Faculty Profiles - TACHIKAWA YUYA

Information

写真a

TACHIKAWA YUYA

Organization

Faculty of Engineering Department of Mechanical Engineering Associate Professor
International Research Center for Hydrogen Energy （Joint Appointment）
Next-Generation Fuel Cell Research Center （Joint Appointment）

School of Engineering （Joint Appointment）
Graduate School of Engineering Department of Hydrogen Energy Systems（Joint Appointment）

Profile

<研究活動> CO2削減を目指した高効率発電の実現をテーマに、高温型燃料電池の開発およびその分析手法の開発を進めている。また、水素を基盤とした社会の将来像をもとに、再生可能エネルギーによる水素製造の効果の検討やCO2フリーエネルギーに向けた開発を進めている。

Homepage

http://www.mech.kyushu-u.ac.jp/~hup/index_en.html
Hydrogen utilization process laboratory

External link

Degree

Ph.D. Eng.

Research Interests・Research Keywords

Research theme：water electrolysis and co-electrolysis

Keyword：Electrolysis

Research period： 2017.3
Research theme：Development of power generation system for carbon free energy

Keyword：Carbon free, power generation

Research period： 2015.4
Research theme：Development of highly efficient SOFC system

Keyword：SOFC, efficiency, system analysis

Research period： 2014.4
Research theme：In-situ visualization of electrochemical reaction on SOFC electrode

Keyword：SOFC, visualization, image analysis technique

Research period： 2013.4

Awards

ポスター奨励賞

2022.9 九州大学水素社会実現に向けた水素モビリティインフラの効果的な配置の検討
優秀賞（ポスターセッション）

2017.1 九州大学高効率発電のさらなる低炭素化実現のための炭素成分分離手法の検討
WHEC Award in World Hydrogen Energy Conference 2014

2014.6 International Association for Hydrogen Energy

Papers

Simulation of SOFC performance using a modified exchange current density for pre-reformed methane-based fuels Reviewed

K. Takino, Y. Tachikawa, K. Mori, S. M. Lyth, Y. Shiratori, S. Taniguchi, K. Sasaki

International Journal of Hydrogen Energy 45 ( 11 ) 6912 - 6925 2020.2

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1016/j.ijhydene.2019.12.089
Self-Supporting Microporous Layer for Polymer Electrolyte Fuel Cells Reviewed

Makoto Yoshikawa, Kotaro Yamamoto, Zhiyun Noda, Masahiro Yasutake, Tatsumi Kitahara, Yuya Tachikawa, Stephen Matthew Lyth, Akari Hayashi, Junko Matsuda, Kazunari Sasaki

ECS Transactions 112 ( 4 ) 83 - 91 2023.9 （ ISSN:1938-5862 eISSN:1938-6737 ）

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The gas diffusion layer (GDL) used in a PEFC is thicker than the electrode catalyst layer and electrolyte membrane. Thinning down the GDL can reduce gas diffusion resistance and volumetric power density of PEFC stacks. In this study, MPL/GDL is prepared by printing microporous layers (MPLs) on carbon meshes of several tens of micrometers thick as substrates for thin-layer GDLs. Through various current-voltage and overvoltage measurements and microstructural analysis of the cells using these thin-layer MPL/GDLs, cell performance has been improved, equivalent to that of the state of the MPL/GDL.

DOI： 10.1149/11204.0083ecst

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A Study on Electrochemical Properties of Fuel-Electrode-Supported Reversible Solid Oxide Cells Reviewed

Ryota Ozaki, Kei Yamada, Kazutaka Ikegawa, Tsutomu Kawabata, Chie Uryu, Yuya Tachikawa, Junko Matsuda, Kazunari Sasaki

ECS Transactions 112 ( 5 ) 141 - 147 2023.9 （ ISSN:1938-5862 eISSN:1938-6737 ）

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Reversible solid oxide cells (r-SOCs) enable both fuel cell power generation and steam-electrolysis hydrogen production by changing the direction of the current in the cells. They are attractive electrochemical devices because of their ability to regulate power supply derived from renewable energy sources. In this study, initial performance was evaluated, and an electrolyte-supported cell and fuel-electrode-supported cells were compared and evaluated with changing operating temperatures. The performances for fuel-electrode-supported cells with various combinations of fuel electrode and electrolyte materials were also evaluated. In addition, the Ni-YSZ/YSZ fuel-electrode-supported cell, which exhibited the highest current-voltage characteristics, was subjected to r-SOC cycling tests to evaluate the cycle durability.

DOI： 10.1149/11205.0141ecst

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Distribution of Relaxation Times of Fuel Electrodes for Reversible Solid Oxide Cells Fabricated Under Various Conditions Reviewed

Yohei Nagatomo, Yuya Tachikawa, Stephen Matthew Lyth, Junko Matsuda, Kazunari Sasaki

ECS Transactions 112 ( 5 ) 121 - 128 2023.9 （ ISSN:1938-5862 eISSN:1938-6737 ）

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Reversible solid oxide cells (r-SOCs) are electrochemical energy devices that can reversibly switch between power generation by solid oxide fuel cells (SOFCs), and hydrogen production by solid oxide electrolysis cells (SOECs) the reverse operation of SOFCs. For the development of high-performance and durable r-SOCs, it is essential to understand not only the I-V characteristics but also the electrode reaction processes systematically. Here in this study, Ni-GDC cermet fuel electrodes, a composite of Ni and mixed-conducting Gd-doped ceria (GDC), were prepared at different sintering temperatures and electrode thicknesses. Electrochemical impedance measurements and distribution of relaxation times (DRT) analysis were performed in both SOFC and SOEC modes to investigate the influence of fabrication conditions on the fuel electrode reaction processes.

DOI： 10.1149/11205.0121ecst

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Effects of Current Collector on Internal Visualization of Solid Oxide Cells Reviewed

Ko Yoshiga, Takeaki Okamoto, Yuya Tachikawa, Kazunari Sasaki

ECS Transactions 112 ( 5 ) 129 - 140 2023.9 （ ISSN:1938-5862 eISSN:1938-6737 ）

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Visualization of reactions occurring inside a solid oxide cell (SOC) during operation is difficult due to the limitation of the operatable temperature to use various sensors and measurement equipment. Therefore, we are investigating a visualization method to combine three-dimensional simulation with in-operando temperature observation inside SOCs. In this study, we focused on evaluating the effect of a current collector shape on the cell performance and temperature distribution. As a result, we confirmed that the effects of several current collector shape modifications appeared in the temperature distribution. Based on the calculated temperature and current density distributions, we proposed an appropriate current collector shape for observing the temperature distribution inside the cell by experiment. Using the practical observation setup model considered in this study, the influence of sulfur poisoning on the temperature distribution was also calculated and evaluated.

DOI： 10.1149/11205.0129ecst

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In-Situ Observation of Temperature Distribution on a Planar Type SOEC During Start-Stop Cycle Operation Reviewed

Takeaki Okamoto, Masahiro Yasutake, Yuya Tachikawa, Kazunari Sasaki

ECS Transactions 111 ( 6 ) 223 - 230 2023.5 （ ISSN:1938-5862 eISSN:1938-6737 ）

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It is important to establish various analytical methods for solid oxide electrolysis cells (SOECs) under practical operating conditions to improve their performance and to analyze their degradation phenomena. In-situ observation of temperature distribution on a planar-type SOEC enables to reveal the distributions of electrochemical reactions and the cell degradation over time. In this study, 600-hour operation tests under start-stop cycling and constant current loading conditions have conducted using a 5 cm × 5 cm planar-type cell to evaluate the SOEC electrochemical performance and to observe the cell surface by infrared camera. The effect of cell performance degradation on the temperature distribution during operation has been evaluated. As a result, it was found that the temperature distribution on the cell surface is affected by the gas flow and current distribution, and that the temperature distribution on the cell surface changes after long-term operation even with constant-current loading operation.

DOI： 10.1149/11106.0223ecst

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Reversible Solid Oxide Cells: Cycling and Long-Term Durability of Air Electrodes Reviewed

Kazutaka Ikegawa, Kengo Miyara, Yuya Tachikawa, Stephen Matthew Lyth, Junko Matsuda, Kazunari Sasaki

ECS Transactions 111 ( 6 ) 313 - 321 2023.5 （ ISSN:1938-5862 eISSN:1938-6737 ）

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Durability and diffusion of various elements in the LSCF-based air electrode of reversible solid oxide cells (r-SOC) are studied. The r-SOC cycling durability tests are conducted by continuously switching between SOFC and SOEC operations. The performance and durability of air electrodes are verified especially after ca. 500 r-SOC cycles.

DOI： 10.1149/11106.0313ecst

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Reversible Solid Oxide Cells: Selection of Fuel Electrode Materials for Improved Performance and Durability Reviewed

Kazunari Sasaki, Katsuya Natsukoshi, Kei Yamada, Kazutaka Ikegawa, Masahiro Yasutake, Yuya Tachikawa, Stephen Matthew Lyth, Junko Matsuda, Bilge Yildiz, Harry L. Tuller

ECS Transactions 111 ( 6 ) 1901 - 1906 2023.5 （ ISSN:1938-5862 eISSN:1938-6737 ）

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Different fuel electrodes for reversible solid oxide cells (r-SOC) are investigated with the aim of improving performance in both solid oxide electrolysis cell (SOEC) and solid oxide fuel cell (SOFC) modes, and durability in reversible operation mode. Electrodes based on gadolinium-doped ceria (GDC) as a mixed ionic electronic conductor, and lanthanum-doped strontium titanate (LST) as an electronic conductor are selected. The current-voltage characteristics of r-SOC single cells, and their cycling durability up to 1000 cycles are evaluated. LST-GDC co-impregnated with Ni and GDC prove to be highly durable in reversible operation, as a suitable fuel electrode material for r-SOCs.

DOI： 10.1149/11106.1901ecst

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Serum immunoglobulin G as a discriminator of infection in follicular lymphoma patients undergoing chemotherapy with bendamustine in combination with rituximab

Hirata, A; Miyashita, K; Tanaka, T; Hirata, K; Narazaki, T; Utsunomiya, H; Ohno, H; Nakashima, E; Tachikawa, Y; Choi, I; Taguchi, K; Suehiro, Y

HEMATOLOGY 27 ( 1 ) 384 - 395 2022.12 （ ISSN:1024-5332 eISSN:1607-8454 ）

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DOI： 10.1080/16078454.2022.2051863

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PubMed
Cold start cycling durability of fuel cell stacks for commercial automotive applications

Tsuyoshi Takahashi, Yohsuke Kokubo, Kazuya Murata, Osamu Hotaka, Shigeki Hasegawa, Yuya Tachikawa, Masamichi Nishihara, Junko Matsuda, Tatsumi Kitahara, Stephen M. Lyth, Akari Hayashi, Kazunari Sasaki

International Journal of Hydrogen Energy 47 ( 97 ) 41111 - 41123 2022.11 （ ISSN:0360-3199 eISSN:1879-3487 ）

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System durability is crucial for the successful commercialization of polymer electrolyte fuel cells (PEFCs) in fuel cell electric vehicles (FCEVs). Besides conventional electrochemical cycling durability during long-term operation, the effect of operation in cold climates must also be considered. Ice formation during start up in sub-zero conditions may result in damage to the electrocatalyst layer and the polymer electrolyte membrane (PEM). Here, we conduct accelerated cold start cycling tests on prototype fuel cell stacks intended for incorporation into commercial FCEVs. The effect of this on the stack performance is evaluated, the resulting mechanical damage is investigated, and degradation mechanisms are proposed. Overall, only a small voltage drop is observed after the durability tests, only minor damage occurs in the electrocatalyst layer, and no increase in gas crossover is observed. This indicates that these prototype fuel cell stacks successfully meet the cold start durability targets for automotive applications in FCEVs.

DOI： 10.1016/j.ijhydene.2022.09.172

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Design Optimization of Highly Efficient SOEC Co-Electrolysis Processes

Yuhei Nakashima, Yuya Tachikawa, Kanzunari Sasaki

ECS Transactions 109 ( 11 ) 25 - 35 2022.9 （ ISSN:1938-5862 ISBN:9781607685395 eISSN:1938-6737 ）

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High-temperature co-electrolysis of water and carbon dioxide using solid oxide electrolysis cells (SOECs) has attracted interest as an efficient synthesis gases production method. The SOECs and a fuel synthesis reactor are usually combined to produce hydrocarbon-rich fuel. In this study, we focused on investigating the effects of H2O/CO2 ratio of feed gas to the SOEC fuel electrode and gas and heat recycles on the fuel production efficiency were evaluated by mass and heat balance analysis. The results described that the amount of fuel production depended on the feed gas composition. In the case of increasing CO2 flow rate to the fuel electrode, the maximum amount of methane was produced and the efficiency of fuel production became 93.1% when the feed gas composition was controlled as H2O/CO2 = 4.32. These results indicate that the fuel production efficiency significantly depended on the operation condition of SOEC co-electrolysis and the system design.

DOI： 10.1149/10911.0025ecst

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Visualization and Observation of Spatial Temperature Distribution in Reversible Solid Oxide Cells through Simulation and Thermal Imaging Reviewed

Takuro Fukumoto, Naoki Endo, Katsuya Natsukoshi, Yuya Tachikawa, George Frederick Harrington, Stephen Matthew Lyth, Junko Matsuda, Kazunari Sasaki

ECS Transactions 109 ( 11 ) 15 - 24 2022.9 （ ISSN:1938-5862 ISBN:9781607685395 eISSN:1938-6737 ）

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Understanding the phenomena which occur inside a solid oxide cell in operation is important in the development of more efficient devices. However, it is difficult to experimentally visualize the distribution of the internal power generation state due to the very high temperature operation. In this study, the performance of a reversible solid oxide cell (r-SOC) was simulated to visualize current-voltage (I-V) characteristics and internal temperature distribution. The validity of the model was verified by comparing with the I-V characteristics and temperature distribution experimentally measured by an actual cell. The establishment of this technique will eventually enable the simulation of cell stacks and systems.

DOI： 10.1149/10911.0015ecst

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Temperature Distribution Analysis of PEM Electrolyzer in High Current Density Operation By Numerical Simulation Reviewed

Masahiro Yasutake, Zhiyun Noda, Yuya Tachikawa, Stephen Matthew Lyth, Junko Matsuda, Masamichi Nishihara, Kohei Ito, Akari Hayashi, Kazunari Sasaki

ECS Transactions 109 ( 9 ) 437 - 450 2022.9 （ ISSN:1938-5862 ISBN:9781607685395 eISSN:1938-6737 ）

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An advantage of polymer electrolyte membrane water electrolysis (PEMWE) over other water electrolysis technologies is its ability to operate at high current densities. However, resistive heating during . In this study, the internal cell temperature distribution at high current densities up to 12 A cm-2 is evaluated through numerical simulation. The correlation between the temperature gradient in the cell and the flow rate of water supplied is examined. An increase in water supply is effective in minimizing high temperature gradients at higher current densities.

DOI： 10.1149/10909.0437ecst

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Polarization Resistance of Ceria-Containing Fuel Electrodes in Solid Oxide Cells Studied By Impedance and DRT Analysis Reviewed

Naoki Endo, Takuro Fukumoto, Yuya Tachikawa, Stephen Matthew Lyth, Junko Matsuda, Kazunari Sasaki

ECS Transactions 109 ( 11 ) 3 - 13 2022.9 （ ISSN:1938-5862 ISBN:9781607685395 eISSN:1938-6737 ）

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Solid oxide electrolysis cells (SOECs) can be used to perform steam electrolysis in a process which is the reverse of power generation using a solid oxide fuel cell (SOFCs). They are capable of highly efficient hydrogen production. In this study, various model fuel electrode materials were compared and evaluated over a wide range of current densities in both SOFC and SOEC modes. Here, we prepared three types of cells: (i) with a conventional Ni-scandia-stabilized-zirconia (Ni-ScSZ) cermet fuel electrode, (ii) with a Ni-gadolinia-doped ceria (Gd0.1Ce0.9O2, Ni-GDC) cermet fuel electrode, and (iii) with a Ni-GDC co-impregnated fuel electrode fabricated by the co-impregnation method. The electrode reactions are characterized through measurements of electrochemical impedance spectra (EIS) and subsequent analysis of distribution of relaxation times (DRT). The results suggest that the use of mixed ionic and electronic conductor GDC as a fuel electrode material is advantageous especially in SOEC operation mode.

DOI： 10.1149/10911.0003ecst

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Performance and Durability of Solid Oxide Electrolysis Cell Air Electrodes Prepared By Various Conditions Reviewed

Kazutaka Ikegawa, Kengo Miyara, Yuya Tachikawa, Stephen Matthew Lyth, Junko Matsuda, Kazunari Sasaki

ECS Transactions 109 ( 11 ) 71 - 78 2022.9 （ ISSN:1938-5862 ISBN:9781607685395 eISSN:1938-6737 ）

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Fuel electrode materials are important for achieving higher performance and durability in solid oxide fuel cells (SOFCs), solid oxide electrolysis cells (SOECs), and reversible solid oxide cells (r-SOCs). On the other hand, the air electrode also faces performance and durability issues. For air electrodes, studies have been conducted on their performance and durability in SOFC operation, but the performance and durability of air electrodes in SOEC and r-SOC operation needs to be investigated in more detail. The electrochemical performance and durability of SOEC and r-SOC are evaluated by conducting electrolysis performance tests of LSCF-based air electrodes with different preparation conditions, electrolysis durability tests at the thermoneutral potential, and a 1000-cycle test in r-SOC mode.

DOI： 10.1149/10911.0071ecst

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Ni-Alloy Fuel Electrodes for Reversible Solid Oxide Cells

Kei Yamada, Yuya Tachikawa, Stephen Matthew Lyth, Junko Matsuda, Kazunari Sasaki

ECS Transactions 109 ( 11 ) 63 - 69 2022.9 （ ISSN:1938-5862 ISBN:9781607685395 eISSN:1938-6737 ）

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Reversible solid oxide cells (r-SOCs) are devices that can operate efficiently in both fuel cell and electrolysis operation modes. Nickel is widely used as an anode in conventional solid oxide fuel cells (SOFCs), but this agglomerates due to redox cycling, leading to irreversible performance degradation, making it unsuitable for r-SOCs. Here, we apply alternative electrodes to r-SOCs, in which Ni-Co alloy functions as a catalyst and an electronic conductor, whilst Ce0.9Gd0.1O2 (GDC) functions as a mixed ionic-electronic conductor. The electrochemical performance of these Ni-Co-GDC electrodes and their reverse-operation durability in r-SOCs are evaluated, and the effect of varying the amount of Co is investigated, compared with conventional cermet fuel electrodes. These novel materials exhibit high electrochemical performance and durability against SOFC/SOEC reverse-operation cycling.

DOI： 10.1149/10911.0063ecst

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Performance and durability of Ni–Co alloy cermet anodes for solid oxide fuel cells

Kohei Matsumoto, Yuya Tachikawa, Stephen M. Lyth, Junko Matsuda, Kazunari Sasaki

International Journal of Hydrogen Energy 47 ( 68 ) 29441 - 29455 2022.8 （ ISSN:0360-3199 eISSN:1879-3487 ）

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Ni alloys are examined as redox-resistant alternatives to pure Ni for solid oxide fuel cell (SOFC) anodes. Among the various candidate alloys, Ni–Co alloys are selected due to their thermochemical stability in the SOFC anode environment. Ni–Co alloy cermet anodes are prepared by ammonia co-precipitation, and their electrochemical performance and microstructure are evaluated. Ni–Co alloy anodes exhibit high durability against redox cycling, whilst the current-voltage characteristics are comparable to those of pure Ni cermet anodes. Microstructural observation reveals that cobalt-rich oxide layers on the outer surface of the Ni–Co alloy particles protect against further oxidation within the Ni alloy. In long-term durability tests using highly humidified hydrogen gas, the use of a Ni–Co cermet with Gd-doped CeO2 suppresses degradation of the power generation performance. It is concluded that Ni–Co alloy cermet anodes are highly attractive for the development of robust SOFCs.

DOI： 10.1016/j.ijhydene.2022.06.268

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Exchange current density of reversible solid oxide cell electrodes Reviewed International journal

Takuro Fukumoto, Naoki Endo, Katsuya Natsukoshi, Yuya Tachikawa, George F Harrington, Stephen M Lyth, Junko Matsuda, Kazunari Sasaki

International Journal of Hydrogen Energy 2022.4

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DOI： 10.1016/j.ijhydene.2022.03.164
Exchange current density of reversible solid oxide cell electrodes

Takuro Fukumoto, Naoki Endo, Katsuya Natsukoshi, Yuya Tachikawa, George F. Harrington, Stephen M. Lyth, Junko Matsuda, Kazunari Sasaki

International Journal of Hydrogen Energy 47 ( 37 ) 16626 - 16639 2022.4

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DOI： 10.1016/j.ijhydene.2022.03.164
Accelerated Durability Testing of Fuel Cell Stacks for Commercial Automotive Applications: A Case Study

Tsuyoshi Takahashi, Takuya Ikeda, Kazuya Murata, Osamu Hotaka, Shigeki Hasegawa, Yuya Tachikawa, Masamichi Nishihara, Junko Matsuda, Tatsumi Kitahara, Stephen M. Lyth, Akari Hayashi, Kazunari Sasaki

JOURNAL OF THE ELECTROCHEMICAL SOCIETY 169 ( 4 ) 2022.4 （ ISSN:0013-4651 eISSN:1945-7111 ）

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Language：English Publishing type：Research paper (scientific journal) Publisher：ELECTROCHEMICAL SOC INC

System durability is crucially important for the successful commercialization of fuel cell electric vehicles (FCEVs). Conventional accelerated durability testing protocols employ relatively high voltage to hasten carbon corrosion and/or platinum catalyst degradation. However, high voltages are strictly avoided in commercialized FCEVs such as the Toyota MIRAI to minimize these degradation modes. As such, conventional durability tests are not representative of real-world FCEV driving conditions. Here, modified start-stop and load cycle durability tests are conducted on prototype fuel cell stacks intended for incorporation into commercial FCEVs. Polarization curves are evaluated at beginning of test (BOT) and end of test (EOT), and the degradation mechanisms are elucidated by separating the overvoltages at both 0.2 and 2.2 A cm(-2). Using our modified durability protocols with a maximum cell voltage of 0.9 V, the prototype fuel cell stacks easily meet durability targets for automotive applications, corresponding to 15-year operation and 200,000 km driving range. These findings have been applied successfully in the development of new fuel cell systems for FCEVs, in particular the second-generation Toyota MIRAI.

DOI： 10.1149/1945-7111/ac662d

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Reversible Solid Oxide Cells: Durability of fuel electrodes against voltage cycling

Katsuya Natsukoshi, Kengo Miyara, Yuya Tachikawa, Junko Matsuda, Shunsuke Taniguchi, George F. Harrington, Kazunari Sasakia-E

ECS Transactions 103 ( 1 ) 375 - 382 2021.7

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DOI： 10.1149/10301.0375ecst
Preparation of Model SOFCs with Proton-Conducting Electrolyte on Metal Support Using Pulse Laser Deposition

Katsuya Miyamoto, Tsutomu Kawabata, Yuya Tachikawa, Junko Matsuda, Shunsuke Taniguchi, Yoshio Matsuzaki, Akari Hayashi, Kazunari Sasaki

ECS Transactions 103 ( 1 ) 2033 - 2040 2021.7

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DOI： 10.1149/10301.2033ecst
Exchange Current Density of Solid Oxide Electrolysis Cell Electrodes

Takuro Fukumoto, Naoki Endo, Kouki Mori, Yuya Tachikawa, Junko Matsuda, Shunsuke Taniguchi, Kazunari Sasaki

ECS Transactions 103 ( 1 ) 2007 - 2016 2021.7

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DOI： 10.1149/10301.2007ecst
DRT Analysis of Solid Oxide Electrolysis Cells: Polarization Resistance of Fuel Electrodes

Naoki Endo, Takuro Fukumoto, Rei Ushijima, Katsuya Natsukoshi, Yuya Tachikawa, Junko Matsuda, Shunsuke Taniguchi, Kazunari Sasaki

ECS Transactions 103 ( 1 ) 1981 - 1989 2021.7

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DOI： 10.1149/10301.1981ecst
Redox Durability of Ni-Co Alloy Cermet Anodes for SOFCs

Kohei Matsumoto, Yuya Tachikawa, Junko Matsuda, Shunsuke Taniguchi, Kazunari Sasaki

ECS Transactions 103 ( 1 ) 1549 - 1556 2021.7

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DOI： 10.1149/10301.1549ecst
Numerical study on biogas refining system combined with proton-conducting solid oxide electrolyzer

Y. Tachikawa, Y. Matsuzaki, Y. Kawabata, S. Taniguchi, K. Sasaki

ECS Transactions 103 ( 1 ) 845 - 851 2021.7

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DOI： 10.1149/10301.0845ecst
Visualization and mechanical strength of glass seal in planar type solid oxide fuel cells Reviewed

Yuto Wakita, Yuya Tachikawa, Hironori Nakajima, Shigeru Hamada, Kohei Ito

International Journal of Hydrogen Energy 45 ( 41 ) 21754 - 21766 2020.8

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DOI： 10.1016/j.ijhydene.2020.05.153
Visualization and mechanical strength of glass seal in planar type solid oxide fuel cells

Yuto Wakita, Yuya Tachikawa, Hironori Nakajima, Shigeru Hamada, Kohei Ito

International Journal of Hydrogen Energy 45 ( 41 ) 21754 - 21766 2020.8

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DOI： 10.1016/j.ijhydene.2020.05.153
Proposal of ultra-high-efficiency zero-emission power generation systems

Yasuharu Kawabata, Tatsuya Nakajima, Kazuo Nakamura, Toru Hatae, Yuya Tachikawa, Shunsuke Taniguchi, Yoshio Matsuzaki, Kazunari Sasaki

Journal of Power Sources 448 2020.2

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DOI： 10.1016/j.jpowsour.2019.227459
Simulation of SOFC performance using a modified exchange current density for pre-reformed methane-based fuels

K. Takino, Y. Tachikawa, K. Mori, S. M. Lyth, Y. Shiratori, S. Taniguchi, K. Sasaki

International Journal of Hydrogen Energy 45 ( 11 ) 6912 - 6925 2020.2

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DOI： 10.1016/j.ijhydene.2019.12.089
Suppression of Leakage Current in Proton-Conducting BaZr_0.8Y_0.2O_3-δ Electrolyte by Forming Hole-Blocking Layer Reviewed

167 ( 8 ) 2020.1

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Solid oxide fuel cells (SOFCs) with proton-conducting solid electrolyte, instead of the oxide-ion conducting solid electrolyte have attracted attentions because of their high potential to reduce operating temperatures and to enhance the electrical efficiencies of SOFCs. In addition, the proton-conducting SOFCs with multistage electrochemical oxidation configuration will be promising technology for critically-high electric efficiencies. However, it is known that there are non-negligible charge -carriers other than protons in typical proton-conducting solid oxide electrolytes at relatively high temperatures. The existence of the partial conductivities of holes and/or electrons will cause the internal leakage current that consumes fuel but never generates any electrical power output. The higher ratio of the leakage current to external current will more deteriorate the electrical efficiency. In this study, the effects of blocking -layers formed on the air side surface of base electrolyte layer consisting of BaZr_0.8Y_0.2O_3-δ (BZY82) for suppressing the leakage current have been investigated by using electrochemical parameters of the partial conduction of the materials. The chemical potential profile and leakage current showed large dependence on the material of the blocking-layer. Lanthanum tungstate was found to play a role as unique and strong blocking-layer against the leakage current.

DOI： 10.1149/1945-7111/ab904f
Suppression of Leakage Current in Proton-Conducting BaZr<inf>0.8</inf>Y<inf>0.2</inf>O<inf>3-δ</inf> Electrolyte by Forming Hole-Blocking Layer

167 ( 8 ) 2020.1

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Solid oxide fuel cells (SOFCs) with proton-conducting solid electrolyte, instead of the oxide-ion conducting solid electrolyte have attracted attentions because of their high potential to reduce operating temperatures and to enhance the electrical efficiencies of SOFCs. In addition, the proton-conducting SOFCs with multistage electrochemical oxidation configuration will be promising technology for critically-high electric efficiencies. However, it is known that there are non-negligible charge -carriers other than protons in typical proton-conducting solid oxide electrolytes at relatively high temperatures. The existence of the partial conductivities of holes and/or electrons will cause the internal leakage current that consumes fuel but never generates any electrical power output. The higher ratio of the leakage current to external current will more deteriorate the electrical efficiency. In this study, the effects of blocking -layers formed on the air side surface of base electrolyte layer consisting of BaZr0.8Y0.2O3-δ (BZY82) for suppressing the leakage current have been investigated by using electrochemical parameters of the partial conduction of the materials. The chemical potential profile and leakage current showed large dependence on the material of the blocking-layer. Lanthanum tungstate was found to play a role as unique and strong blocking-layer against the leakage current.

DOI： 10.1149/1945-7111/ab904f
Improved Redox Cycling Durability in Alternative Ni Alloy-Based SOFC Anodes

Yusuke Ishibashi, Kohei Matsumoto, Shotaro Futamura, Yuya Tachikawa, Junko Matsuda, Stephen M. Lyth, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

Journal of the Electrochemical Society 167 ( 12 ) 2020.1

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DOI： 10.1149/1945-7111/abac87
Improved Redox Cycling Durability in Alternative Ni Alloy-Based SOFC Anodes Reviewed

Yusuke Ishibashi, Kohei Matsumoto, Shotaro Futamura, Yuya Tachikawa, Junko Matsuda, Stephen M. Lyth, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

Journal of the Electrochemical Society 167 ( 12 ) 2020.1

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DOI： 10.1149/1945-7111/abac87
Proposal of ultra-high-efficiency zero-emission power generation systems Reviewed International journal

Yasuharu Kawabata, Tatsuya Nakajima, Kazuo Nakamura, Toru Hatae, Yuya Tachikawa, Shunsuke Taniguchi, Yoshio Matsuzaki, Kazunari Sasaki

Journal of Power Sources 448 2019.11

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DOI： 10.1016/j.jpowsour.2019.227459
水素ステーションの設置・配置計画 Reviewed

立川雄也, 佐々木一成

火力原子力発電 70 ( 10 ) 36 - 41 2019.10

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Alternative Ni-alloy cermet anode materials for SOFCs

Yusuke Ishibashi, Shotaro Futamura, Yuya Tachikawa, Junko Matsuda, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

ECS Transactions 91 ( 1 ) 1889 - 1896 2019.7

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DOI： 10.1149/09101.1889ecst
SOFC Anodes Impregnated with Noble Metal Catalyst Nanoparticles for High Fuel Utilization Reviewed

Shotaro Futamura, Aki Muramoto, Yuya Tachikawa, Junko Matsuda, Stephen Matthew Lyth, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

ECS Transactions 91 ( 1 ) 1905 - 1913 2019.7

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DOI： 10.1149/09101.1905ecst
Leakage current and chemical potential profile in proton-conducting bi-layered solid oxide electrolyte with Bzy and hole-blocking layers

Y. Matsuzaki, Y. Tachikawa, Y. Baba, K. Sato, H. Iinuma, G. Kojo, H. Matsuo, J. Otomo, H. Matsumoto, S. Taniguchi, K. Sasaki

ECS Transactions 91 ( 1 ) 1009 - 1018 2019.7

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DOI： 10.1149/09101.1009ecst
Modified Energy Efficiencies of Proton-conducting SOFCs with Partial Conductions of Oxide-ions and Holes

Y. Matsuzaki, Y. Tachikawa, H. Iinuma, K. Sato, Y. Baba, J. Otomo, H. Matsumoto, S. Taniguchi, K. Sasaki

Fuel Cells 19 ( 4 ) 503 - 511 2019.6

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DOI： 10.1002/fuce.201800181
Modified Energy Efficiencies of Proton-conducting SOFCs with Partial Conductions of Oxide-ions and Holes Reviewed

Y. Matsuzaki, Y. Tachikawa, H. Iinuma, K. Sato, Y. Baba, J. Otomo, H. Matsumoto, S. Taniguchi, K. Sasaki

Fuel Cells 19 ( 4 ) 503 - 511 2019.6

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DOI： 10.1002/fuce.201800181
Oxidation-induced degradation and performance fluctuation of solid oxide fuel cell Ni anodes under simulated high fuel utilization conditions Reviewed

Tatsuya Kawasaki, Junko Matsuda, Yuya Tachikawa, Stephen Matthew Lyth, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

International Journal of Hydrogen Energy 44 ( 18 ) 9386 - 9399 2019.4

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DOI： 10.1016/j.ijhydene.2019.02.136
Oxidation-induced degradation and performance fluctuation of solid oxide fuel cell Ni anodes under simulated high fuel utilization conditions

Tatsuya Kawasaki, Junko Matsuda, Yuya Tachikawa, Stephen Matthew Lyth, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

International Journal of Hydrogen Energy 44 ( 18 ) 9386 - 9399 2019.4

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DOI： 10.1016/j.ijhydene.2019.02.136
SOFC anodes impregnated with noble metal catalyst nanoparticles for high fuel utilization Reviewed

Shotaro Futamura, Aki Muramoto, Yuya Tachikawa, Junko Matsuda, Stephen Matthew Lyth, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

International Journal of Hydrogen Energy 44 ( 16 ) 8502 - 8518 2019.3

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DOI： 10.1016/j.ijhydene.2019.01.223
SOFC anodes impregnated with noble metal catalyst nanoparticles for high fuel utilization

Shotaro Futamura, Aki Muramoto, Yuya Tachikawa, Junko Matsuda, Stephen M. Lyth, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

International Journal of Hydrogen Energy 44 ( 16 ) 8502 - 8518 2019.3

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DOI： 10.1016/j.ijhydene.2019.01.223
Solid Oxide Electrolyzer Devices using Proton and Oxide-ion Conducting Electrolyte Reviewed International journal

Yuya TACHIKAWA, Yoshio MATSUZAKI, Takaaki SOMEKAWA, Koki SATO, Shunsuke TANIGUCHI, Kazunari SASAKI

Proceedings of 13th European SOFC & SOE Forum (EFCF2018) 2018.7

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Solid Oxide Electrolyzer Devices using Proton and Oxide-ion Conducting Electrolyte Reviewed International journal

Yuya TACHIKAWA, Yoshio MATSUZAKI, Takaaki SOMEKAWA, Koki SATO, Shunsuke TANIGUCHI, Kazunari SASAKI

Proceedings of 13th European SOFC & SOE Forum (EFCF2018) 05 ( A12 ) 160 - 174 2018.7

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Modified Energy Efficiencies of Proton-conducting SOFCs with Partial Conductions of Oxide-ions and Holes Reviewed International journal

Yoshio MATSUZAKI, Yuya TACHIKAWA, Hiroki IINUMA, Koki SATO, Yoshitaka BABA, Junichiro OTOMO, Hiroshige MATSUMOTO, Shunsuke TANIGUCHI, Kazunari SASAKI

Proceedings of 13th European SOFC & SOE Forum (EFCF2018) 07 ( A15 ) 40 - 49 2018.7

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High-pressure C-H-O diagrams Fuel composition, carbon deposition, and open circuit voltage of pressurized SOFCs Reviewed

Aki Muramoto, Yudai Kikuchi, Yuya Tachikawa, Stephen Matthew Lyth, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

International Journal of Hydrogen Energy 42 ( 52 ) 30769 - 30786 2017.12

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DOI： 10.1016/j.ijhydene.2017.10.122
High-pressure C-H-O diagrams: Fuel composition, carbon deposition, and open circuit voltage of pressurized SOFCs

Aki Muramoto, Yudai Kikuchi, Yuya Tachikawa, Stephen M. Lyth, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

International Journal of Hydrogen Energy 42 ( 52 ) 30769 - 30786 2017.12

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DOI： 10.1016/j.ijhydene.2017.10.122
Correlating Cathode Microstructure with PEFC Performance Using FIB-SEM and TEM Reviewed

M. Okumura, Z. Noda, J. Matsuda, Y. Tachikawa, M. Nishihara, S. M. Lyth, A. Hayashi, K. Sasaki

Journal of The Electrochemical Society 164 ( 9 ) F928 - F934 2017.7

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DOI： 10.1149/2.0581709jes
Physicochemical properties of Ba(Zr,Ce)O_3-Δ-based proton-conducting electrolytes for solid oxide fuel cells in terms of chemical stability and electrochemical performance Reviewed

42 ( 26 ) 16722 - 16730 2017.6

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To enhance the power generation efficiency of solid oxide fuel cells (SOFCs), the use of proton-conducting solid solutions of doped BaCeO₃ and doped BaZrO₃, with formulas of the Ba(Zr_0.1Ce_0.7Y_0.1X_0.1)O_3-δ (X = Ga, Sc, In, Yb, Gd), was investigated as SOFCs electrolyte materials with respect to both chemical stability and electrical conductivity. Regarding chemical stability, the weight changes of each material were measured under a CO₂ atmosphere in a temperature range of 1200 °C–600 °C. Higher chemical stability was observed for dopant ions with smaller radii. Regarding conductivity, the dependences of the total conductivities on the oxygen partial pressure and temperature were measured in the temperature range of 600 °C–900 °C. In each material, the total conductivity was proportional to the oxygen partial pressure to the 1/4 power at high oxygen partial pressures, as previously observed for accepter-doped proton-conducting perovskite-type oxides. The derived conductivities for each type of charge carrier showed that the hole conductivity increased with the ionic conductivity. Based on the measured data, the leakage current densities were calculated for SOFCs with each of the investigated electrolyte materials and an area-specific resistance of 0.383 Ωcm². BZCYSc showed the minimum leakage current density, with a value of 3.7% of the external current density at 600 °C. Therefore, this study indicates that BZCYSc is the most desirable among the materials investigated for use as SOFCs electrolyte. However, for BZCYSc to be used as SOFCs electrolyte material, a protective layer is needed to ensure its chemical stability.

DOI： 10.1016/j.ijhydene.2017.04.267
Physicochemical properties of Ba(Zr,Ce)O<inf>3-Δ</inf>-based proton-conducting electrolytes for solid oxide fuel cells in terms of chemical stability and electrochemical performance

42 ( 26 ) 16722 - 16730 2017.6

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To enhance the power generation efficiency of solid oxide fuel cells (SOFCs), the use of proton-conducting solid solutions of doped BaCeO3 and doped BaZrO3, with formulas of the Ba(Zr0.1Ce0.7Y0.1X0.1)O3-δ (X = Ga, Sc, In, Yb, Gd), was investigated as SOFCs electrolyte materials with respect to both chemical stability and electrical conductivity. Regarding chemical stability, the weight changes of each material were measured under a CO2 atmosphere in a temperature range of 1200 °C–600 °C. Higher chemical stability was observed for dopant ions with smaller radii. Regarding conductivity, the dependences of the total conductivities on the oxygen partial pressure and temperature were measured in the temperature range of 600 °C–900 °C. In each material, the total conductivity was proportional to the oxygen partial pressure to the 1/4 power at high oxygen partial pressures, as previously observed for accepter-doped proton-conducting perovskite-type oxides. The derived conductivities for each type of charge carrier showed that the hole conductivity increased with the ionic conductivity. Based on the measured data, the leakage current densities were calculated for SOFCs with each of the investigated electrolyte materials and an area-specific resistance of 0.383 Ωcm2. BZCYSc showed the minimum leakage current density, with a value of 3.7% of the external current density at 600 °C. Therefore, this study indicates that BZCYSc is the most desirable among the materials investigated for use as SOFCs electrolyte. However, for BZCYSc to be used as SOFCs electrolyte material, a protective layer is needed to ensure its chemical stability.

DOI： 10.1016/j.ijhydene.2017.04.267
Alternative Ni-Impregnated Mixed Ionic-Electronic Conducting Anode for SOFC Operation at High Fuel Utilization Reviewed

S. Futamura, Y. Tachikawa, J. Matsuda, S. M. Lyth, Y. Shiratori, S. Taniguchi, K. Sasaki

Journal of The Electrochemical Society 164 ( 10 ) F3055 - F3063 2017.6

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DOI： 10.1149/2.0071710jes
Alternative SOFC anode materials with ion- and electron-conducting backbones for higher fuel utilization

S. Futamura, Yuya Tachikawa, Junko Matsuda, Stephen Matthew Lyth, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 ECS Transactions 78 1179 - 1187 2017.5

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DOI： 10.1149/07801.1179ecst
Relationship between electrochemical properties and electrolyte partial conductivities of proton-conducting ceramic fuel cells

Y. Matsuzaki, Y. Tachikawa, T. Somekawa, K. Sato, Y. Kawabata, M. Sugahara, H. Matsumoto, S. Taniguchi, K. Sasaki

ECS Transactions 78 ( 1 ) 441 - 450 2017.5

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DOI： 10.1149/07801.0441ecst
New applications of SOFC-MGT hybrid power generation system for low-carbon society

Y. Kawabata, Y. Tachikawa, S. Taniguchi, Y. Matsuzaki, K. Sasaki

ECS Transactions 78 ( 1 ) 197 - 208 2017.5

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DOI： 10.1149/07801.0197ecst
Glass shape change during firing for improving the seal of planar SOFCs

Y. Wakita, Y. Tachikawa, H. Nakajima, K. Ito

ECS Transactions 78 ( 1 ) 1731 - 1737 2017.5

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DOI： 10.1149/07801.1731ecst
Fuel composition in pressurized SOFCs

A. Muramoto, Y. Kikuchi, Y. Tachikawa, Y. Shiratori, S. Taniguchi, K. Sasaki

ECS Transactions 78 ( 1 ) 2497 - 2504 2017.5

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DOI： 10.1149/07801.2497ecst
Effect of exchange current density on current distribution at planar-type SOFC anodes

K. Takino, Y. Tachikawa, Y. Shiratori, S. Taniguchi, K. Sasaki

ECS Transactions 78 ( 1 ) 1523 - 1531 2017.5

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DOI： 10.1149/07801.1523ecst
Effect of carbon-neutral fuel fed solid oxide fuel cell system on CO<inf>2</inf> emission reduction

Y. Tachikawa, Y. Matsuzaki, Y. Kawabata, M. Sugahara, T. Somekawa, S. Taniguchi, K. Sasaki

ECS Transactions 78 ( 1 ) 2563 - 2568 2017.5

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DOI： 10.1149/07801.2563ecst
Degradation of SOFCs by various impurities: Impedance spectroscopy and microstructural analysis

Y. Kikuchi, J. Matsuda, Y. Tachikawa, Y. Shiratori, S. Taniguchi, K. Sasaki

ECS Transactions 78 ( 1 ) 1253 - 1260 2017.5

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DOI： 10.1149/07801.1253ecst
Alternative SOFC anode materials with ion- and electron-conducting backbones for higher fuel utilization

S. Futamura, Y. Tachikawa, J. Matsuda, S. M. Lyth, Y. Shiratori, S. Taniguchi, K. Sasaki

ECS Transactions 78 ( 1 ) 1179 - 1187 2017.5

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DOI： 10.1149/07801.1179ecst
Relationship between electrochemical properties and electrolyte partial conductivities of proton-conducting ceramic fuel cells

Y. Matsuzaki, Yuya Tachikawa, T. Somekawa, K. Sato, Y. Kawabata, M. Sugahara, Hiroshige Matsumoto, Shunsuke Taniguchi, Kazunari Sasaki

15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 ECS Transactions 78 441 - 450 2017.5

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DOI： 10.1149/07801.0441ecst
New applications of SOFC-MGT hybrid power generation system for low-carbon society

Y. Kawabata, Yuya Tachikawa, Shunsuke Taniguchi, Y. Matsuzaki, Kazunari Sasaki

15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 ECS Transactions 78 197 - 208 2017.5

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DOI： 10.1149/07801.0197ecst
Glass shape change during firing for improving the seal of planar SOFCs

Y. Wakita, Yuya Tachikawa, Hironori Nakajima, Kohei Ito

15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 ECS Transactions 78 1731 - 1737 2017.5

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DOI： 10.1149/07801.1731ecst
Fuel composition in pressurized SOFCs

A. Muramoto, Y. Kikuchi, Yuya Tachikawa, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 ECS Transactions 78 2497 - 2504 2017.5

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DOI： 10.1149/07801.2497ecst
Effect of exchange current density on current distribution at planar-type SOFC anodes

K. Takino, Yuya Tachikawa, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 ECS Transactions 78 1523 - 1531 2017.5

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DOI： 10.1149/07801.1523ecst
Effect of carbon-neutral fuel fed solid oxide fuel cell system on CO₂ emission reduction

Yuya Tachikawa, Y. Matsuzaki, Y. Kawabata, M. Sugahara, T. Somekawa, Shunsuke Taniguchi, Kazunari Sasaki

15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 ECS Transactions 78 2563 - 2568 2017.5

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DOI： 10.1149/07801.2563ecst
Degradation of SOFCs by various impurities Impedance spectroscopy and microstructural analysis

Y. Kikuchi, Junko Matsuda, Yuya Tachikawa, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 ECS Transactions 78 1253 - 1260 2017.5

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DOI： 10.1149/07801.1253ecst
Characterization of yttrium-doped ceria with various yttrium concentrations as cathode interlayers of SOFCs Reviewed

T. Somekawa, Y. Matsuzaki, Yuya Tachikawa, Shunsuke Taniguchi, Kazunari Sasaki

Ionics 23 ( 1 ) 95 - 103 2017.1

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DOI： 10.1007/s11581-016-1816-9
Characterization of yttrium-doped ceria with various yttrium concentrations as cathode interlayers of SOFCs

T. Somekawa, Y. Matsuzaki, Y. Tachikawa, S. Taniguchi, K. Sasaki

Ionics 23 ( 1 ) 95 - 103 2017.1

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DOI： 10.1007/s11581-016-1816-9
Physicochemical properties of proton-conductive Ba(Zr_0.1Ce_0.7Y_0.1Yb_0.1)O_3−δ solid electrolyte in terms of electrochemical performance of solid oxide fuel cells Reviewed

41 ( 39 ) 17539 - 17547 2016.10

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Previously, most studies of proton-conductive electrolytes for SOFCs were conducted to achieve lower-temperature operation. In this study, we investigate a proton-conductive electrolyte to realize high-efficiency SOFCs. To this end, the dependencies of the total conductivity of Ba(Zr_0.1Ce_0.7Y_0.1Yb_0.1)O_3−δ on the oxygen partial pressure and temperature under wet and dry conditions were measured. Based on the measurement data, we analyzed the ratio of ionic current density to electronic current density in the temperature range of 550–900 °C. Assuming that the area-specific resistance of the electrolyte and the external current density were 0.383 Ω cm² and 0.25 A cm⁻², respectively, the leakage current densities caused by the minority carriers were calculated to be 5.4% and 9.7% of the external current density at 550 °C and 600 °C, respectively. This study developed a method to evaluate proton-conductive electrolyte materials and established guidelines for the development of new materials for high-efficiency SOFCs.

DOI： 10.1016/j.ijhydene.2016.07.265
Physicochemical properties of proton-conductive Ba(Zr<inf>0.1</inf>Ce<inf>0.7</inf>Y<inf>0.1</inf>Yb<inf>0.1</inf>)O<inf>3−δ</inf> solid electrolyte in terms of electrochemical performance of solid oxide fuel cells

41 ( 39 ) 17539 - 17547 2016.10

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Previously, most studies of proton-conductive electrolytes for SOFCs were conducted to achieve lower-temperature operation. In this study, we investigate a proton-conductive electrolyte to realize high-efficiency SOFCs. To this end, the dependencies of the total conductivity of Ba(Zr0.1Ce0.7Y0.1Yb0.1)O3−δ on the oxygen partial pressure and temperature under wet and dry conditions were measured. Based on the measurement data, we analyzed the ratio of ionic current density to electronic current density in the temperature range of 550–900 °C. Assuming that the area-specific resistance of the electrolyte and the external current density were 0.383 Ω cm2 and 0.25 A cm−2, respectively, the leakage current densities caused by the minority carriers were calculated to be 5.4% and 9.7% of the external current density at 550 °C and 600 °C, respectively. This study developed a method to evaluate proton-conductive electrolyte materials and established guidelines for the development of new materials for high-efficiency SOFCs.

DOI： 10.1016/j.ijhydene.2016.07.265
Anode gas recirculation for improving the performance and cost of a 5-kW solid oxide fuel cell system Reviewed

Ryohei Torii, Yuya Tachikawa, Kazunari Sasaki, Kohei Ito

Journal of Power Sources 325 229 - 237 2016.9

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DOI： 10.1016/j.jpowsour.2016.06.045
Anode gas recirculation for improving the performance and cost of a 5-kW solid oxide fuel cell system

Ryohei Torii, Yuya Tachikawa, Kazunari Sasaki, Kohei Ito

Journal of Power Sources 325 229 - 237 2016.9

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DOI： 10.1016/j.jpowsour.2016.06.045
Preparation of Iridium-SnO₂/VGCF Electrocatalysts for Water Electrolysis Reviewed

Hiroki Anai, Junko Matsuda, Zyiyun Noda, Yuya Tachikawa, Akari Hayashi, Kohei Ito, Kazunari Sasaki

ECS Transactions 75 ( 14 ) 1129 - 1135 2016.8

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DOI： 10.1149/07514.1129ecst
Potential for critically-high electrical efficiency of multi-stage SOFCs with proton-conducting solid electrolyte Reviewed International journal

Yoshio Matsuzaki, Yuya Tachikawa, Takaaki Somekawa, Kouki Sato, Hiroshige Matsumoto, Shunsuke Taniguchi, Kazunari Sasaki

Proceedings of 12th European SOFC & SOE Forum (EFCF2016) 2016.7

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Multi-stage highly-efficient SOFC system using proton and oxide-ion conducting electrolyte Reviewed International journal

Yuya Tachikawa, Yoshio Matsuzaki, Takaaki Somekawa, Shunsuke Taniguchi, Kazunari Sasaki

Proceedings of 12th European SOFC & SOE Forum (EFCF2016) 2016.7

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Symbolic Analysis of Multi-Stage Electrochemical Oxidation for Enhancement of Electric Efficiency of SOFCs

Y. Matsuzaki, Yuya Tachikawa, T. Hatae, Hiroshige Matsumoto, Shunsuke Taniguchi, Kazunari Sasaki

Ceramic Transactions 255 41 - 46 2016.5

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DOI： 10.1002/9781119234531.ch4
Symbolic Analysis of Multi-Stage Electrochemical Oxidation for Enhancement of Electric Efficiency of SOFCs

Y. Matsuzaki, Y. Tachikawa, T. Hatae, H. Matsumoto, S. Taniguchi, K. Sasaki

Ceramic for Energy Conversion, Storage, and Distribution Systems 255 41 - 46 2016.5

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DOI： 10.1002/9781119234531.ch4
Preparation of iridium/SnO₂/VGCF electrocatalysts for water electrolysis

H. Anai, Junko Matsuda, Z. Noda, Yuya Tachikawa, Akari Hayashi, Kohei Ito, Kazunari Sasaki

Symposium on Polymer Electrolyte Fuel Cells 16, PEFC 2016 - PRiME 2016/230th ECS Meeting Polymer Electrolyte Fuel Cells 16, PEFC 16 75 1129 - 1135 2016

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DOI： 10.1149/07514.1129ecst
Conceptual design for critically-high power generation efficiency by using multi-stage solid oxide fuel cells (SOFCs) or proton-conducting ceramic fuel cells (PCFCs) Reviewed

Yuya Tachikawa

Science Proceedings 2016

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DOI： 10.14800/sp.1272
革新的高効率SOFCに向けた取り組み Reviewed

松崎良雄, Yuya Tachikawa, 染川貴亮

燃料電池 15 ( 3 ) 63 - 68 2016

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電気化学的多段酸化を用いた固体酸化物形燃料電池(SOFC)による革新的高効率発電の可能性 Reviewed

松崎良雄, Yuya Tachikawa, 染川貴亮, 佐藤洸基, Hiroshige Matsumoto, 谷口俊介, Kazunari Sasaki

エネルギーと動力 66 ( 286 ) 50 - 57 2016

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新規材料とシステム開発の融合による革新的新規高性能SOFCの創出

Yuya Tachikawa, 松崎良雄, Kazunari Sasaki

34 ( 1 ) 27 - 31 2016

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Study of the solid-state reaction at the interface between lanthanoid-doped ceria and yttria-stabilized zirconia for solid-oxide fuel cell applications Reviewed

T. Somekawa, Y. Matsuzaki, Yuya Tachikawa, Shunsuke Taniguchi, Kazunari Sasaki

Solid State Ionics 282 1 - 6 2015.12

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DOI： 10.1016/j.ssi.2015.09.005
Study of the solid-state reaction at the interface between lanthanoid-doped ceria and yttria-stabilized zirconia for solid-oxide fuel cell applications

T. Somekawa, Y. Matsuzaki, Y. Tachikawa, S. Taniguchi, K. Sasaki

Solid State Ionics 282 1 - 6 2015.12

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DOI： 10.1016/j.ssi.2015.09.005
A FIB-SEM Study on Correlations between PEFC Electrocatalyst Microstructure and Cell Performance Reviewed

Makito Okumura, Yohei Nagamatsu, Zhiyun Noda, Yuya Tachikawa, Takeshi Daio, Akari Hayashi, Kazunari Sasaki

ECS Transactions 69 ( 17 ) 709 - 714 2015.9

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DOI： 10.1149/06917.0709ecst
In Operando Visualization of SOFC Electrodes by Thermography and Visible Light Imaging

Y. Tachikawa, J. Sugimoto, M. Takada, T. Kawabata, S. M. Lyth, Y. Shiratori, K. Sasaki

ECS Electrochemistry Letters 4 ( 11 ) F61 - F64 2015.8

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DOI： 10.1149/2.0031511eel
Effect of proton-conduction in electrolyte on electric efficiency of multi-stage solid oxide fuel cells Reviewed

Yoshio Matsuzaki, Yuya Tachikawa, Takaaki Somekawa, Toru Hatae, Hiroshige Matsumoto, Shunsuke Taniguchi, Kazunari Sasaki

Scientific Reports 5 2015.7

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DOI： 10.1038/srep12640
Effect of proton-conduction in electrolyte on electric efficiency of multi-stage solid oxide fuel cells

Yoshio Matsuzaki, Yuya Tachikawa, Takaaki Somekawa, Toru Hatae, Hiroshige Matsumoto, Shunsuke Taniguchi, Kazunari Sasaki

Scientific Reports 5 2015.7

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DOI： 10.1038/srep12640
A Parametric Study of SOFC Performances with Multi-Stage Electrochemical Oxidation for Enhancement of Electric Efficiency

Yoshio Matsuzaki, Yuya Tachikawa, Toru Hatae, Hiroshige Matsumoto, Shunsuke Taniguchi, Kazunari Sasaki

ECS Transactions 68 ( 1 ) 1961 - 1968 2015.6

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DOI： 10.1149/06801.1961ecst
Visualization of SOFC Anode by Dual Imaging Method Using Infrared and Visible Light Cameras Reviewed

Yuya Tachikawa, Tsutomu Kawabata, Yusuke Shiratori, Kazunari Sasaki

ECS Transactions 68 ( 1 ) 1115 - 1120 2015.6

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DOI： 10.1149/06801.1115ecst
Smart Fuel Cell Demonstration Project: A Challenge to Realize SOFC-Powered Campus

Kazunari Sasaki, Shunsuke Taniguchi, Yusuke Shiratori, Akari Hayashi, Toshihiro Oshima, Masamichi Nishihara, Yuya Tachikawa, Takeshi Daio, Tsutomu Kawabata, Miki Fujita, Ayumi Zaitsu

ECS Transactions 68 ( 1 ) 171 - 178 2015.6

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DOI： 10.1149/06801.0171ecst
Process Analysis for Achieving Highly Enhanced Total Efficiency on Multi-Stage Fuel Supplied SOFC System

Yuya Tachikawa, Yoshio Matsuzaki, Toru Hatae, Shunsuke Taniguchi, Kazunari Sasaki

ECS Transactions 68 ( 1 ) 3107 - 3113 2015.6

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DOI： 10.1149/06801.3107ecst
Oxidation-Induced Degradation of SOFC Ni Anodes at High Fuel Utilizations

Tatsuya Kawasaki, Junki Sugimoto, Yuya Tachikawa, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

ECS Transactions 68 ( 1 ) 1345 - 1352 2015.6

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DOI： 10.1149/06801.1345ecst
Oxidation-induced degradation of SOFC Ni anodes at high fuel utilizations

T. Kawasaki, J. Sugimoto, Yuya Tachikawa, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage Solid Oxide Fuel Cells 14, SOFC 2015 68 1345 - 1352 2015.1

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DOI： 10.1149/06801.1345ecst
A FIB-SEM study on correlations between PEFC electrocatalyst microstructure and cell performance

Makito Okumura, Yohei Nagamatsu, Zhiyun Noda, Yuya Tachikawa, Takeshi Daio, Akari Hayashi, Kazunari Sasaki

Symposium on Polymer Electrolyte Fuel Cells 15, PEFC 2015 - 228th ECS Meeting Polymer Electrolyte Fuel Cells 15, PEFC 15 69 709 - 714 2015

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DOI： 10.1149/06917.0709ecst
Visualization of SOFC anode by dual imaging method using infrared and visible light cameras

Yuya Tachikawa, T. Kawabata, Yusuke Shiratori, Kazunari Sasaki

14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage Solid Oxide Fuel Cells 14, SOFC 2015 68 1115 - 1120 2015

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DOI： 10.1149/06801.1115ecst
Smart fuel cell demonstration project A challenge to realize SOFC-powered campus

Kazunari Sasaki, Shunsuke Taniguchi, Yusuke Shiratori, Akari Hayashi, T. Oshima, Masamichi Nishihara, Yuya Tachikawa, T. Daio, T. Kawabata, M. Fujita, A. Zaitsu

14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage Solid Oxide Fuel Cells 14, SOFC 2015 68 171 - 178 2015

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DOI： 10.1149/06801.0171ecst
Process analysis for achieving highly enhanced total efficiency on multi-stage fuel supplied SOFC system

Yuya Tachikawa, Y. Matsuzaki, T. Hatae, Shunsuke Taniguchi, Kazunari Sasaki

14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage Solid Oxide Fuel Cells 14, SOFC 2015 68 3107 - 3113 2015

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DOI： 10.1149/06801.3107ecst
A parametric study of SOFC performances with multi-stage electrochemical oxidation for enhancement of electric efficiency

Y. Matsuzaki, Yuya Tachikawa, T. Hatae, Hiroshige Matsumoto, Shunsuke Taniguchi, Kazunari Sasaki

14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage Solid Oxide Fuel Cells 14, SOFC 2015 68 1961 - 1968 2015

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DOI： 10.1149/06801.1961ecst
A solid polymer water electrolysis system utilizing natural circulation Reviewed

Yoshinori Kobayashi, Kenichiro Kosaka, Takashi Yamamoto, Yuya Tachikawa, Kohei Ito, Kazunari Sasaki

International Journal of Hydrogen Energy 39 ( 29 ) 16263 - 16274 2014.10

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DOI： 10.1016/j.ijhydene.2014.07.153
A solid polymer water electrolysis system utilizing natural circulation

Yoshinori Kobayashi, Kenichiro Kosaka, Takashi Yamamoto, Yuya Tachikawa, Kohei Ito, Kazunari Sasaki

International Journal of Hydrogen Energy 39 ( 29 ) 16263 - 16274 2014.10

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DOI： 10.1016/j.ijhydene.2014.07.153
SOFC Durability against Standby and Shutdown Cycling Reviewed

M. Hanasaki, C. Uryu, T. Daio, T. Kawabata, Y. Tachikawa, S. M. Lyth, Y. Shiratori, S. Taniguchi, K. Sasaki

Journal of The Electrochemical Society 161 ( 9 ) F850 - F860 2014.6

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DOI： 10.1149/2.0421409jes
Computational Study of Performance Drop Phenomena Based on Sulfur Adsorption and Desorption Model in Planar-Type SOFCs

Yuya Tachikawa, Takami Hosoi, Takashi Nishimura, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

ECS Transactions 57 ( 1 ) 2841 - 2848 2013.10

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DOI： 10.1149/05701.2841ecst
In-Plane Distribution of Carbon Deposition on SOFCs Reviewed

Takashi Nishimura, Tsutomu Kawabata, Yuya Tachikawa, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

ECS Transactions 57 ( 1 ) 1593 - 1598 2013.10

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DOI： 10.1149/05701.1593ecst
Influence of Cathode Polarization on the Chromium Poisoning of SOFC Cathodes Consisting of LSM, LSCF and LNF Reviewed

Eunjoo Park, Shunsuke Taniguchi, Jyh-Tyng Chou, Yuya Tachikawa, Yusuke Shiratori, Kazunari Sasaki

ECS Transactions 50 ( 30 ) 21 - 25 2013.4

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DOI： 10.1149/05030.0021ecst
Numerical analysis for evaluating the effect of hydrophilic anode support for water management in polymer electrolyte fuel cells Reviewed

Yuya Tachikawa, Zhiyun Noda, Akari Hayashi, Yusuke Shiratori, Kazunari Sasaki

Theoretical and Applied Mechanics Japan 61 161 - 172 2013

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Influence of cathode polarization on the chromium poisoning of SOFC cathodes consisting of LSM, LSCF and LNF

Eunjoo Park, Shunsuke Taniguchi, Jyh Tyng Chou, Yuya Tachikawa, Yusuke Shiratori, Kazunari Sasaki

Symposium on Materials Degradation in Energy Systems: Corrosion and Hydrogen-Material Interactions - 22nd ECS Meeting/PRiME 2012 Materials Degradation in Energy Systems: Corrosion and Hydrogen-Material Interactions 50 21 - 25 2012

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DOI： 10.1149/05030.0021ecst
Exchange current density of solid oxide fuel cell electrodes

T. Yonekura, Yuya Tachikawa, T. Yoshizumi, Yusuke Shiratori, Kohei Ito, Kazunari Sasaki

12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting Solid Oxide Fuel Cells 12, SOFC XII 35 1007 - 1014 2011.12

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DOI： 10.1149/1.3570081
Exchange Current Density of Solid Oxide Fuel Cell Electrodes Reviewed

Takahiro Yonekura, Yuya Tachikawa, Tomoo Yoshizumi, Yusuke Shiratori, Kohei Ito, Kazunari Sasaki

ECS Transactions 35 ( 1 ) 1007 - 1014 2011.4

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DOI： 10.1149/1.3570081
Numerical Analysis of a Three-Dimensional Sandwich Model for Investigating the Effect of Using the Pore Size Distribution Reviewed

Yuya Tachikawa, Yuya Matsuda, Hiroshi Kanayama

Journal of Computational Science and Technology 4 ( 2 ) 89 - 104 2010

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DOI： 10.1299/jcst.4.89
Finite Element Analysis of a Two-Dimensional Sandwich Model for the Inspection of Fuel Cell Internal Characteristics Reviewed

TACHIKAWA Yuya, KANAYAMA Hiroshi, ISHII Chiaki, HASEGAWA Hiroshi

Journal of Computational Science and Technology 3 ( 2 ) 488 - 498 2009.7

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Finite Element Analysis of a Two-Dimensional Sandwich Model for the Inspection of Fuel Cell Internal Characteristics
In this paper, numerical modeling methods for a fuel cell are explained. The aim of this study is to make an analysis system to perform investigation on the whole behavior of a fuel cell with higher precision. Through numerical analysis, the effects of changing the structure and the control can be made clear. Liquid water distribution and temperature distribution inside the fuel cell are analyzed and evaluated in general under various situations. This paper describes through a two-phase two-dimensional analysis effects of pressure and temperature for liquid water distribution in fuel cells.

DOI： 10.1299/jcst.3.488
Finite element analysis of a two-dimensional sandwich model for inspection of fuel cell inside characteristics

Yuya Tachikawa, Hiroshi Kanayama, Chiaki Ishii, Hiroshi Hasegawa

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B 75 ( 754 ) 1357 - 1362 2009.6

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DOI： 10.1299/kikaib.75.754_1357
Finite element analysis of a two-dimensional sandwich model for inspection of fuel cell inside characteristics Reviewed

Yuya Tachikawa, Hiroshi Kanayama, Chiaki Ishii, Hiroshi Hasegawa

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B 75 ( 754 ) 1357 - 1362 2009.1

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DOI： 10.1299/kikaib.75.754_1357
燃料電池内部特性検証用二次元サンドイッチモデルの有限要素解析(熱工学,内燃機関,動力など) Reviewed

Yuya Tachikawa, 金山寛, 石井千明, 長谷川弘

75 ( 754 ) 1357 - 1362 2009

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In this paper, numerical modeling methods for a fuel cell are explained. The aim of this study is to make an analysis system to perform investigation on the whole behavior of a fuel cell with higher precision. Through numerical analysis, the effects of changing the structure and the control will be able to be made clear. Liquid water distribution and temperature distribution inside the fuel cell are analyzed and evaluated in general under various situations. This paper describes through a two-phase two-dimensional analysis effects of pressure and temperature for liquid water distribution in fuel cells.

DOI： 10.1299/kikaib.75.754_1357

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Books

Chapters 43 Numerical Analysis of the Optimal Distribution of Hydrogen Filling Stations, in Hydrogen Energy Engineering, A Japanese Perspective

Yuya Tachikawa et al., Kazunari Sasaki, Hai-Wen Li, Akari Hayashi, Junichiro Yamabe, Teppei Ogura, Stephen M. Lyth Eds.（ Role： Joint author）

Springer 2016.10

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Language：English Book type：Scholarly book

DOI： 10.1007/978-4-431-56042-5

Presentations

再生可能エネルギーを用いた水素製造拠点の配置検討シミュレータ

立川雄也, @矢野夏子, @志賀元明, 佐々木　一成

第26回燃料電池シンポジウム 2019.5

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Event date： 2019.5

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京都 Country：Japan
カーボンニュートラルに向けた日本における再エネ水素の導入拡大ステップの検討（その4）ゼロエミッション電源の利用拡大を想定した地域のエネルギーと水素の運用システムの設計

立川雄也、小澤暁人、古林敬顕、吉岡剛、辻本将晴、古川智裕、中島良

第42回水素エネルギー協会大会 2022.11

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Event date： 2022.11

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京 Country：Japan
再エネ普及拡大を踏まえた水素を用いたエネルギー融通ポテンシャルの検討

立川雄也

第41回水素エネルギー協会大会 2021.11

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Event date： 2021.11 - 2021.12

Language：Japanese Presentation type：Oral presentation (general)

Venue：オンライン Country：Japan
Numerical Study on Biogas Refining System Combined with Proton-Conducting Solid Oxide Electrolyzer International conference

Yuya Tachikawa, Yoshio Matsuzaki, Yasuharu Kawabata, Shunsuke Taniguchi, Kazunari Sasaki

The 17th International Symposium on Solid Oxide Fuel Cells (SOFC-XVII) 2021.7

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Event date： 2021.7

Language：English Presentation type：Oral presentation (general)

Country：Japan
プロトン伝導性セルを用いたバイオガス改良システムの熱物質収支解析

@立川雄也、@松崎良雄、川端康晴、馬場好孝、佐藤洸基、飯沼広基、@福永栄一、@谷口俊輔、@佐々木一成

第28回　SOFC研究発表会 2019.12

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Event date： 2019.12

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京 Country：Japan
Process Analysis of Biogas Refining System using Proton Conducting SOEC International conference

@TACHIKAWA Yuya, @MATSUZAKI Yoshio, KAWABATA Yasuharu, SATO Koki, IINUMA Hiroki, BABA Yoshitaka, @FUKUNAGA Eiichi, @TANIGUCHI Shunsuke, @SASAKI Kazunari

The 13th Pacific Rim Conference of Ceramic Societies (PACRIM13) 2019.10

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Event date： 2019.10 - 2019.11

Language：English

Country：Japan
Alternative Ni-alloy cermet anode materials for SOFCs

Yusuke Ishibashi, Shotaro Futamura, Yuya Tachikawa, Junko Matsuda, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019 2019.1

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Event date： 2019.9

Language：English

Country：Japan
SOFC anodes impregnated with noble metal catalyst nanoparticles for high fuel utilization

S. Futamura, A. Muramoto, Y. Tachikawa, J. Matsuda, S. M. Lyth, Y. Shiratori, S. Taniguchi, K. Sasaki

16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019 2019.1

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Event date： 2019.9

Language：English

Country：Japan
Leakage current and chemical potential profile in proton-conducting bi-layered solid oxide electrolyte with Bzy and hole-blocking layers

Y. Matsuzaki, Y. Tachikawa, Y. Baba, K. Sato, H. Iinuma, G. Kojo, H. Matsuo, J. Otomo, H. Matsumoto, S. Taniguchi, K. Sasaki

16th International Symposium on Solid Oxide Fuel Cells, SOFC 2019 2019.1

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Event date： 2019.9

Language：English

Country：Japan
C-H-O Diagrams for Solid Oxide Fuel Cells International conference

#Aki MURAMOTO, #Yudai KiKUCHI, Yuya TACHIKAWA, Yusuke SHIRATORI, Shunsuke TANIGUCHI, Kazunari SASAKI

AiMES2018 2018.10

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Event date： 2019.6

Language：English Presentation type：Oral presentation (general)

Country：Mexico
Modified Energy Efficiencies of Proton-conducting SOFCs with Partial Conductions of Oxide-ions and Holes International conference

@Yoshio MATSUZAKI, Yuya TACHIKAWA, @Koki SATO, @Takaaki SOMEKAWA, @Junichiro OTOMO, Hiroshige MATSUMOTO, Shunsuke TANIGUCHI, Kazunari SASAKI

13th EUROPEAN SOFC & SOE FORUM 2018 2018.7

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Event date： 2019.6

Language：English Presentation type：Oral presentation (general)

Country：Switzerland
Solid Oxide Electrolyzer Devices using Proton and Oxide-ion Conducting Electrolyte International conference

Yuya TACHIKAWA, @Yoshio MATSUZAKI, @Takaaki SOMEKAWA, @Koki SATO, Shunsuke TANIGUCHI, Kazunari SASAKI

13th EUROPEAN SOFC & SOE FORUM 2018 2018.7

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Event date： 2019.6

Language：English Presentation type：Oral presentation (general)

Country：Switzerland
Development of Solid Oxide Fuel Cell System Concept for Low Carbon Emission Invited International conference

Yuya TACHIKAWA, @Yoshio MATSUZAKI, @Yoshitaka BABA, @Hiroki IINUMA, @Koki SATO, Shunsuke TANIGUCHI, Kazunari SASAKI

12th International Conference for Ceramic Materials and Components for Energy and Environmental Applications 2018.7

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Event date： 2019.6

Language：English Presentation type：Oral presentation (general)

Country：Singapore
Preparation and Characterization of Alternative Ni-Based Anode Materials for SOFCs International conference

#Yusuke ISHIBASHI, #Shotaro FUTAMURA, Yuya TACHIKAWA, Junko MATSUDA, Yusuke SHIRATORI, ShunsukeTANIGUCHI, Kazunari SASAKI

AiMES2018 2018.10

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Event date： 2019.6

Language：English Presentation type：Oral presentation (general)

Country：Mexico
Simulation and Visualization of Cell Performance Distribution of SOFCs International conference

#Keisuke TAKINO, Yuya TACHIKAWA, Yusuke SHIRATORI, Shunsuke TANIGUCHI, Kazunari SASAKI

AiMES2018 2018.10

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Event date： 2019.6

Language：English Presentation type：Oral presentation (general)

Country：Mexico
コンビナトリアル化学を用いたdoped-BaZrxCe1-xO3系電解質材料のCO2耐性評価

@佐藤洸基、@飯沼広基、@馬場良孝、@松崎良雄、立川雄也、松本広重、谷口俊輔、佐々木一成

電気化学会第86回大会 2019.3

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Event date： 2019.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都大学吉田キャンパス Country：Japan
SOFCの緩和時間分布と各種依存性に関する研究

#牛島怜、#岩永佳大、立川雄也、白鳥祐介、谷口俊輔、佐々木一成

電気化学会第86回大会 2019.3

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Event date： 2019.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都大学吉田キャンパス Country：Japan
SOFCセルの性能評価とシミュレーションによる内部分布の可視化

#森滉稀、#瀧野恵介、立川雄也、白鳥祐介、谷口俊輔、佐々木一成

電気化学会第86回大会 2019.3

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Event date： 2019.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：京都大学吉田キャンパス Country：Japan
SOFCの高耐久化に向けたNi合金アノードに関する研究

#石橋悠佑、#二村聖太郎、立川雄也、松田潤子、白鳥祐介、谷口俊輔、佐々木一成

九州大学エネルギーウィーク2019 Q-PITプレナリーセッションポスター発表会 2019.1

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Event date： 2019.1

Language：Japanese

Venue：九州大学 Country：Japan
シミュレーションによるSOFCセル特性の可視化に関する研究

#瀧野惠介、立川雄也、白鳥祐介、谷口俊輔、佐々木一成

第4回NEXT-FC基盤研究報告会 2019.1

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Event date： 2019.1

Language：Japanese

Venue：九州大学 Country：Japan
Ni合金アノードの開発

#石橋悠佑、#二村聖太郎、立川雄也、松田潤子、白鳥祐介、谷口俊輔、佐々木一成

第4回NEXT-FC基盤研究報告会 2019.1

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Event date： 2019.1

Language：Japanese

Venue：九州大学 Country：Japan
SOFC燃料の熱力学平衡組成に関する研究

#村本朱、#菊池勇大、立川雄也、白鳥祐介、谷口俊輔、佐々木一成

第4回NEXT-FC基盤研究報告会 2019.1

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Event date： 2019.1

Language：Japanese

Venue：九州大学 Country：Japan
SOFC燃料中不純物の熱力学平衡許容濃度の検討

#村本朱、#菊池勇大、立川雄也、白鳥祐介、谷口俊輔、佐々木一成

第27回SOFC研究発表会 2018.12

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Event date： 2018.12

Language：Japanese Presentation type：Oral presentation (general)

Venue：科学技術館サイエンスホール,　東京都千代田区 Country：Japan
Ni合金を用いたSOFCアノード材料に関する研究

#石橋悠佑、#二村聖太郎、立川雄也、松田潤子、白鳥祐介、谷口俊輔、佐々木一成

第27回SOFC研究発表会 2018.12

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Event date： 2018.12

Language：Japanese Presentation type：Oral presentation (general)

Venue：科学技術館サイエンスホール,　東京都千代田区 Country：Japan
プロトン伝導性電解質を用いたSOECの電解特性

立川雄也、松崎良雄、染川貴亮、佐藤洸基、谷口俊輔、松本広重、佐々木一成

電気化学会第85回大会 2018.3

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Event date： 2018.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京理科大学葛飾キャンパス Country：Japan
SOFCカソードの不純物被毒と電極インピーダンスDRT解析

#岩永佳大、#菊池勇大、松田潤子、立川雄也、白鳥祐介、谷口俊輔、佐々木一成

電気化学会第85回大会 2018.3

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Event date： 2018.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京理科大学葛飾キャンパス Country：Japan
導電骨格を制御したSOFCアノード材料に関する研究

#石橋悠佑、#二村聖太郎、立川雄也、松田潤子、白鳥祐介、谷口俊輔、佐々木一成

電気化学会第85回大会 2018.3

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Event date： 2018.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京理科大学葛飾キャンパス Country：Japan
高燃料利用率発電用SOFCアノード材料に関する研究

#二村聖太郎、#村本朱、立川雄也、松田潤子、白鳥祐介、谷口俊輔、佐々木一成

電気化学会第85回大会 2018.3

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Event date： 2018.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京理科大学葛飾キャンパス Country：Japan
高効率SOFCシステム開発に向けたスタックシミュレーションによる内部特性の可視化

#瀧野惠介、立川雄也、白鳥祐介、谷口俊輔、佐々木一成

電気化学会第85回大会 2018.3

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Event date： 2018.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京理科大学葛飾キャンパス Country：Japan
次世代火力発電に向けた加圧SOFC燃料の熱力学平衡組成に関する研究

#村本朱、#菊池勇大、立川雄也、白鳥祐介、谷口俊輔、佐々木一成

電気化学会第85回大会 2018.3

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Event date： 2018.3

Language：Japanese Presentation type：Oral presentation (general)

Venue：東京理科大学葛飾キャンパス Country：Japan
Alternative SOFC anode materials with ion- and electron-conducting backbones for higher fuel utilization

S. Futamura, Yuya Tachikawa, Junko Matsuda, Stephen Matthew Lyth, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 2017.5

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Event date： 2017.7

Language：English

Country：United States
Relationship between electrochemical properties and electrolyte partial conductivities of proton-conducting ceramic fuel cells

Y. Matsuzaki, Yuya Tachikawa, T. Somekawa, K. Sato, Y. Kawabata, M. Sugahara, Hiroshige Matsumoto, Shunsuke Taniguchi, Kazunari Sasaki

15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 2017.5

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Event date： 2017.7

Language：English

Country：United States
New applications of SOFC-MGT hybrid power generation system for low-carbon society

Y. Kawabata, Yuya Tachikawa, Shunsuke Taniguchi, Y. Matsuzaki, Kazunari Sasaki

15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 2017.5

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Event date： 2017.7

Language：English

Country：United States
Glass shape change during firing for improving the seal of planar SOFCs

Y. Wakita, Yuya Tachikawa, Hironori Nakajima, Kohei Ito

15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 2017.5

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Event date： 2017.7

Language：English

Country：United States
Fuel composition in pressurized SOFCs

A. Muramoto, Y. Kikuchi, Yuya Tachikawa, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 2017.5

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Event date： 2017.7

Language：English

Country：United States
Effect of exchange current density on current distribution at planar-type SOFC anodes

K. Takino, Yuya Tachikawa, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 2017.5

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Event date： 2017.7

Language：English

Country：United States
Effect of carbon-neutral fuel fed solid oxide fuel cell system on CO₂ emission reduction

Yuya Tachikawa, Y. Matsuzaki, Y. Kawabata, M. Sugahara, T. Somekawa, Shunsuke Taniguchi, Kazunari Sasaki

15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 2017.5

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Event date： 2017.7

Language：English

Country：United States
Degradation of SOFCs by various impurities Impedance spectroscopy and microstructural analysis

Y. Kikuchi, Junko Matsuda, Yuya Tachikawa, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017 2017.5

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Event date： 2017.7

Language：English

Country：United States
Preparation of iridium/SnO₂/VGCF electrocatalysts for water electrolysis

H. Anai, Junko Matsuda, Z. Noda, Yuya Tachikawa, Akari Hayashi, Kohei Ito, Kazunari Sasaki

Symposium on Polymer Electrolyte Fuel Cells 16, PEFC 2016 - PRiME 2016/230th ECS Meeting 2016

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Event date： 2016.10

Language：English

Country：United States
A FIB-SEM study on correlations between PEFC electrocatalyst microstructure and cell performance

Makito Okumura, Yohei Nagamatsu, Zhiyun Noda, Yuya Tachikawa, Takeshi Daio, Akari Hayashi, Kazunari Sasaki

Symposium on Polymer Electrolyte Fuel Cells 15, PEFC 2015 - 228th ECS Meeting 2015

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Event date： 2015.10

Language：English

Country：United States
Oxidation-induced degradation of SOFC Ni anodes at high fuel utilizations

T. Kawasaki, J. Sugimoto, Yuya Tachikawa, Yusuke Shiratori, Shunsuke Taniguchi, Kazunari Sasaki

14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage 2015.1

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Event date： 2015.7

Language：English

Country：United Kingdom
Visualization of SOFC anode by dual imaging method using infrared and visible light cameras

Yuya Tachikawa, T. Kawabata, Yusuke Shiratori, Kazunari Sasaki

14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage 2015

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Event date： 2015.7

Language：English

Country：United Kingdom
Smart fuel cell demonstration project A challenge to realize SOFC-powered campus

Kazunari Sasaki, Shunsuke Taniguchi, Yusuke Shiratori, Akari Hayashi, T. Oshima, Masamichi Nishihara, Yuya Tachikawa, T. Daio, T. Kawabata, M. Fujita, A. Zaitsu

14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage 2015

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Event date： 2015.7

Language：English

Country：United Kingdom
Process analysis for achieving highly enhanced total efficiency on multi-stage fuel supplied SOFC system

Yuya Tachikawa, Y. Matsuzaki, T. Hatae, Shunsuke Taniguchi, Kazunari Sasaki

14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage 2015

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Event date： 2015.7

Language：English

Country：United Kingdom
A parametric study of SOFC performances with multi-stage electrochemical oxidation for enhancement of electric efficiency

Y. Matsuzaki, Yuya Tachikawa, T. Hatae, Hiroshige Matsumoto, Shunsuke Taniguchi, Kazunari Sasaki

14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015; held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage 2015

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Event date： 2015.7

Language：English

Country：United Kingdom
Influence of cathode polarization on the chromium poisoning of SOFC cathodes consisting of LSM, LSCF and LNF

Eunjoo Park, Shunsuke Taniguchi, Jyh Tyng Chou, Yuya Tachikawa, Yusuke Shiratori, Kazunari Sasaki

Symposium on Materials Degradation in Energy Systems: Corrosion and Hydrogen-Material Interactions - 22nd ECS Meeting/PRiME 2012 2012

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Event date： 2012.10

Language：English

Country：United States
Exchange current density of solid oxide fuel cell electrodes

T. Yonekura, Yuya Tachikawa, T. Yoshizumi, Yusuke Shiratori, Kohei Ito, Kazunari Sasaki

12th International Symposium on Solid Oxide Fuel Cells, SOFC-XII - 219th ECS Meeting 2011.12

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Event date： 2011.5

Language：English

Country：Canada

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Professional Memberships

日本機械学会
日本計算工学会
電気化学会
Electrochemical Society
SOFC研究会
電気化学会

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日本計算工学会

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日本機械学会

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SOFC研究会

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Electrochemical Society

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Committee Memberships

九州大学水素ステーション保安監督者

2017.4 - Present

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Committee type：Other

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Academic Activities

座長

電気化学会第91回大会（名古屋大学東山キャンパス） 2024.3

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Type：Competition, symposium, etc.
座長

電気化学会第85回大会（東京理科大学葛飾キャンパス） 2018.3

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Type：Competition, symposium, etc.

Research Projects

Principle and practice of catalytic decarbonization process constructed by converting industrial GHG to solid carbon and green resources

Grant number：23H00530 2023 - 2025

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

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Grant type：Scientific research funding

CiNii Research
科学研究費助成事業　基盤研究（C）

2021.4 - 2024.3

独立行政法人　日本学術振興会

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Authorship：Principal investigator
NEDO国際共同研究開発事業「⾰新的な可逆⽔蒸気電解セルの国際共同研究開発」

2021.2 - 2024.3

（独）NEDO技術開発機構

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Authorship：Coinvestigator(s)
Interface chemistry of electrochemical reaction on the surface of proton conducting solid oxide

Grant number：21K04981 2021 - 2023

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

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Authorship：Principal investigator Grant type：Scientific research funding

CiNii Research
Systematization of direct-biogas fuel cell technology for creating a new trend of material and energy circulations

Grant number：20KK0248 2020.10 - 2024.3

Grants-in-Aid for Scientific Research Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

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Grant type：Scientific research funding

CiNii Research
NEDO燃料電池等利用の飛躍的拡大に向けた共通課題解決型産学官連携研究開発事業

2020.7 - 2022.6

（独）NEDO技術開発機構

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Authorship：Coinvestigator(s)
Theory and practice of an innovative reaction process for recovering resource from industrial emissions CO2, which is developed by a novel methanation system operated at a room temperature

Grant number：20H00642 2020.4 - 2024.3

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

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Grant type：Scientific research funding

CiNii Research
再エネ対応水電解技術開発

2019

福岡水素エネルギー戦略会議・再エネ利用水素製造実証事業

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Authorship：Coinvestigator(s) Grant type：On-campus funds, funds, etc.
NEDO耐久性迅速評価方法に関する基礎研究

2018.4 - 2020.3

（独）NEDO技術開発機構

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Authorship：Coinvestigator(s)
再エネ対応水電解技術開発

2018

福岡水素エネルギー戦略会議・再エネ利用水素製造実証事業

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Authorship：Coinvestigator(s) Grant type：On-campus funds, funds, etc.
再エネ対応水電解技術開発

2017

福岡水素エネルギー戦略会議・再エネ利用水素製造実証事業

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Authorship：Coinvestigator(s) Grant type：On-campus funds, funds, etc.
高効率発電のさらなる低炭素化実現のための炭素成分分離の研究

2016

平成２８年度エネルギー研究教育機構：若手研究者・博士課程支援プログラム（若手研究者）

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Authorship：Principal investigator Grant type：On-campus funds, funds, etc.
炭素析出を前提とした構造制御によるバイオマス燃料を用いた高温型燃料電池の高性能化

Grant number：15K18327 2015 - 2017

科学研究費助成事業若手研究(B)

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Authorship：Principal investigator Grant type：Scientific research funding
九州大学持続的共進化地域創成拠点

2013.4 - 2022.3

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Authorship：Coinvestigator(s)
固体高分子形燃料電池の新型触媒における性能の評価を目的とした数値解析

Grant number：23760076 2011 - 2012

科学研究費助成事業若手研究(B)

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Authorship：Principal investigator Grant type：Scientific research funding

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Class subject

水素工学概論（Hydrogen Energy Engineering）

2024.4 - 2024.9 First semester
技術マネジメント

2024.4 - 2024.9 First semester
力学基礎演習

2024.4 - 2024.9 First semester
空間表現実習Ⅰ

2023.10 - 2024.3 Second semester
Fuel Cell Engineering（燃料電池工学）

2023.10 - 2024.3 Second semester
Fuel Cell Engineering　GC

2023.10 - 2024.3 Second semester
技術マネジメント

2023.4 - 2023.9 First semester
力学基礎演習

2023.4 - 2023.9 First semester
機械工学実験第二

2022.10 - 2023.3 Second semester
力学基礎演習

2022.4 - 2022.9 First semester
機械工学実験第二

2021.10 - 2022.3 Second semester
力学基礎演習

2021.4 - 2021.9 First semester
機械工学実験第二

2020.10 - 2021.3 Second semester
基幹物理学ⅠＡ演習

2020.4 - 2020.9 First semester
機械工学実験第二

2019.10 - 2020.3 Second semester
基幹物理学ⅠＡ演習

2019.4 - 2019.9 First semester
機械工学実験第二

2018.10 - 2019.3 Second semester
基幹物理学ⅠＡ演習

2018.4 - 2018.9 First semester
機械工学実験第二

2017.10 - 2018.3 Second semester
熱力学・同演習

2017.4 - 2017.9 First semester

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FD Participation

2017.12 Role：Participation Title：アンガーマネジメント～怒りやイライラに振り回されない自分づくり～

Organizer：Undergraduate school department
2017.6 Role：Participation Title：産学連携研究予算と知財の活かし方

Organizer：Undergraduate school department

Other educational activity and Special note

2017 Coaching of Students' Association

Social Activities

福岡県水素グリーン成長戦略会議「人材育成事業・水素専門コース」における「燃料電池の基礎」の講義を担当する。

福岡県水素グリーン成長戦略会議, 九州大学. 2024.3

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Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Seminar, workshop
サイエンスカフェ・「水素エネルギー社会と福岡の未来」

九州大学共進化社会システム創成拠点 2018.2

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Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Lecture
福岡水素エネルギー戦略会議「技術者養成コース」における「燃料電池の特性評価」の解説、実習を担当する。

福岡水素エネルギー戦略会議人材育成センター, 九州大学. 2017.11

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Audience： General,　Scientific,　Company,　Civic organization,　Governmental agency

Type：Seminar, workshop