| Hironori NAKAJIMA | Last modified date：2024.04.18 |
Assistant Professor /
Hydrogen Utilization Engineering /
Department of Mechanical Engineering /
Faculty of Engineering
Presentations
| 1. | Shima, Asuka, Shima, Asuka, Sakurai, Masato, Sone, Yoshitsugu, Nakajima, Hironori, Inoue, Mitsuhiro, Abe, Takayuki, Development of CO2 Reduction-Water Electrolysis Tandem Device as a Full-Scale Model, 52nd International Conference on Environmental Systems. |
| 2. | Hironori Nakajima, Jin Yamashita, Keiichi Okai, Takayuki Kojima, Numerical Modeling of a Pressurized Solid Oxide Fuel Cell for Electric Aircraft, 243rd ECS Meeting with the 18th International Symposium on Solid Oxide Fuel Cells (SOFC-XVIII), 2023.05, Electric aircraft have attracted attention to reducing carbon dioxide emissions and fuel consumption. Compared with conventional aircraft, distributed propulsion with electric motors is expected to increase the efficiency of the propulsion systems for the above purpose. Furthermore, the application of solid oxide fuel cell (SOFC) – gas turbine (GT) hybrid systems to their electric power sources is promising for higher efficiency. We have thus developed a three-dimensional numerical model of a planar SOFC pressurized for the combination with a GT for the optimal design and operation of practical cells. A software package with the finite element method (COMSOL Multiphysics 5.4) is employed to analyze the current and temperature distributions in a cell. Exchange current densities under pressurized conditions are experimentally evaluated using a symmetric test cell for the electrochemical kinetics in the model.. |
| 3. | Ammonia decomposition for hydrogen production with Ni/ZnO nanowire catalysts. |
| 4. | Liquid Water Permeability Test for a Microporous Layer Applied to a Gas-Liquid Separating Polymer Electrolyte Membrane Water Electrolyzer. |
| 5. | Peng Wang, Hironori Nakajima, Tatsumi Kitahara, Effect of Hydrophilic Layer in Double Microporous Layer Coated Gas Diffusion Layer on PEFC Performance, 242nd ECS Meeting, 2022.10. |
| 6. | Asuka Shima, Masato Sakurai, Yoshitsugu Sone, Hironori Nakajima, Mitsuhiro Inoue, Takayuki Abe, Development of CO2 hydrogenation-water electrolysis tandem reactor, 51st International Conference on Environmental Systems, 2022.07. |
| 7. | Development of CO2 hydrogenation-water electrolysis tandem reactor. |
| 8. | Shintaro Iwasaki, Hironori, Nakajima, Tatsumi Kitahara, Pore Network Modeling of Hydrophilic / Hydrophobic Composite Microporous Layers for Polymer Electrolyte Fuel Cells, 240th ECS Meeting, 2021.10. |
| 9. | Hironori Nakajima, Shintaro Iwasaki, Tatsumi Kitahara, Mass Transfer in Microporous Layers for Polymer Electrolyte Fuel Cells Analyzed with Pore Network Modeling, 240th ECS Meeting, 2021.10. |
| 10. | Peng Wang, Hironori Nakajima, Tatsumi Kitahara, Hydrophilic and Hydrophobic Microporous Layer Coated Gas Diffusion Layer for Enhancing PEFC Performance, 240th ECS Meeting, 2021.10. |
| 11. | Wang Xuefeng, Hironori Nakajima, Kohei Ito, Spatial Current and Temperature Variations in a Microtubular Solid Oxide Electrolysis Cell In-Situ Analyzed with Electrode-Segmentation Method, SOFC17, 2021.07. |
| 12. | Tasuku Higa, Hironori Nakajima, Evaluation of Three-Dimensional Placement of Built-in Catalytic Partial Oxidation Catalyst in an Anode-Supported Honeycomb SOFC, SOFC17, 2021.07. |
| 13. | Tandem system by the combination of a novel water elctrolyzer with CO2 hydrogenation reactor. |
| 14. | Koichiro Otaguro, Ryo Saito, Hironori Nakajima, Kohei Ito, Analysis of Influence of Cathode Current Collector Wettability on Current Loss By Crossover Evaluation Both at Cathode and Anode Side, PRiME 2020, 2020.10, [URL]. |
| 15. | Hiroyuki MISE, Masahiro Nakamura, Yuya Tachikawa, Hironori Nakajima, Kohei Ito, Characteristics of a Planar SOFC With Load Variation (A1515), 14th European SOFC & SOE Forum, 2020.10, Renewable energy such as solar power and wind power has been widely introduced to mitigate environmental impacts in energy consumption, but it needs power output leveling for demand. SOFCs can be a candidate for the component thanks to their high efficiency. However, load variation for the leveling gives rise to time variation in distributions of fuel/oxidant concentration, current, and temperature in a cell, affecting the power output stability and the durability of a cell. We have therefore developed a finite element method model of a planar SOFC verified with measurement using segmented electrodes, and investigated corresponding cell behavior assumed in a model of a stationary combined heat and power (CHP) system and limitation of load variation for durable cell/interconnector designs and operating conditions.. |
| 16. | Hironori Nakajima, Experimental and Numerical Analyses of Mass Transfer in Solid Oxide Cells, PRiME 2020, 2020.10, [URL]. |
| 17. | Tasuku Higa, Hironori Nakajima, Fabrication and Evaluation of an Anode-Supported Honeycomb SOFC with Built-in Catalytic Partial Oxidation Micro-Reformer, PRiME 2020, 2020.10, [URL]. |
| 18. | Shintaro Iwasaki, Hironori Nakajima, Tatsumi Kitahara, Pore Network Modeling of Microporous Layers for Polymer Electrolyte Fuel Cells, PRiME 2020, 2020.10, [URL]. |
| 19. | Hydrogen Production From Methanol Steam Reforming With ZnO/CuO Nanowire Catalyst. |
| 20. | 中島 裕典, カーボンリサイクル社会に向けた燃料電池研究, 第11回エネルギー理工学研究所国際シンポジウム（コロナ禍におけるゼロエミッションエネルギー研究活動）, 2020.09, [URL]. |
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| 26. | Yoshihiro Iwanaga, Hironori NAKAJIMA, Kohei ITO, Electrolytic Performance of a Cathode-Supported Honeycomb Solid Oxide Electrolysis Cell, 236th Meeting of the Electrochemical Society, 2019.10, [URL]. |
| 27. | Kohei Sasaki, Hironori NAKAJIMA, Tatsumi KITAHARA, Electrochemical Impedance Spectroscopy Analysis of Carbon Deposition in an Anode-Supported Planar Solid Oxide Fuel Cell By Segmented Electrodes, 236th Meeting of the Electrochemical Society, 2019.10, [URL]. |
| 28. | Y. Iwanaga, H. Nakajima, and K. Ito, Fuel Production with a Cathode-Supported Honeycomb Solid Oxide Electrolysis Cell, 16th International Symposium on Solid Oxide Fuel Cells (SOFC-XVI), 2019.09, [URL]. |
| 29. | Kohei Sasaki, Hironori Nakajima, Tatsumi Kitahara, Influence of Carbon Deposition on the Current Distribution in an Anode-Supported Planar Solid Oxide Fuel Cell in-Situ Assessed by Segmented Electrodes, 16th International Symposium on Solid Oxide Fuel Cells (SOFC-XVI), 2019.09, [URL]. |
| 30. | Hiroki IINUMA, Yoshio MATSUZAKI, Koki SATO, Yoshitaka BABA, Yuya TACHIKAWA, Hironori NAKAJIMA, Shunsuke TANIGUCHI, Junichiro OTOMO, Conceptual Design for Significant Improvement in Efficiency of Long-Term Energy Storage with Reversible Solid Oxide Cells (R-SOC), Asian Pacific Confederation of Chemical Engineering (APCChE), 2019.09, [URL]. |
| 31. | Hironori NAKAJIMA, Mass Transfer in Fuel Cells, NGRC (Nucleation & Growth Research Conference) – International Workshop of Electrochemical/Materials Processing for Renewable Energy –, 2019.06, [URL]. |
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| 39. | Hironori NAKAJIMA, In-plane Current Variations in Solid Oxide Fuel Cells In-situ Identified by Cathode Segmentation, The 10th Kyoto International Forum for Environment and Energy (KIFEE) Symposium, 2018.10, [URL]. |
| 40. | Shunzaburo Murakami, Hironori NAKAJIMA, Current Distributions in Anode-Supported Honeycomb Solid Oxide Fuel Cells, The 10th Kyoto International Forum for Environment and Energy (KIFEE) Symposium, 2018.10, [URL], An anode-supported honeycomb solid oxide fuel cell (SOFC) gives high volumetric power density and improves thermo-mechanical durability at high temperatures. We have so far shown the promising power densities and investigated the effect of the internal flow channel configurations on the cell performance in terms of the hydrogen partial pressure distributions in the cell under operation. In this study, we have investigated the current distribution of anode-supported honeycomb solid oxide fuel cells by finite element analysis and proposed new flow channel structures for practical use. |
| 41. | Wataru Matsunaka, Hironori NAKAJIMA, Alejandro Santis, Dimos Poulikakos, Evaluation of a Micro CPOX Reformer for Solid Oxide Fuel Cells, The 10th Kyoto International Forum for Environment and Energy (KIFEE) Symposium, 2018.10, [URL]. |
| 42. | H.-W. Li, L. He, H. Nakajima, S.-J. Hwang, Y. Filinchuk, H. Hagemann, T. R. Jensen, E. Akiba, Metal Boron Hydrides for Multiple Energy Applications, The 5th International Conference on Nanomechanics and Nanocomposites (ICNN5), 2018.08, [URL]. |
| 43. | Kohei Sasaki, Hironori Nakajima, Tatsumi Kitahara, Spatial Electrochemical Impedance Spectroscopy Analysis of an Anode-supported Planar Solid Oxide Fuel Cell with Segmented Electrodes, The 5th Asian SOFC Symposium, 2018.08, [URL]. |
| 44. | Masahiro Joki, Yuto Wakita, Yuya Tachikawa, Hironori Nakajima, Kohei Ito, Analysis of Resistance Components of a Practical Planar-Type SOFC with the Distribution of Relaxation Time Method, The 5th Asian SOFC Symposium, 2018.08, [URL]. |
| 45. | Yuto Wakita, Yuya Tachikawa, Hironori Nakajima, Kohei Ito, Effect of Glass Wettability on the Mechanical Reliability of the Planar SOFC, The 5th Asian SOFC Symposium, 2018.08, [URL]. |
| 46. | H.-W. Li, L. He, H. Nakajima, Y. Filinchuk, H. Hagemann, T. R. Jensen, E. Akiba, Metal born hydrides for high density hydrogen storage and fast ionic conductivity, THERMEC2018, 2018.07, [URL]. |
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| 49. | H.-W. Li, L. He, H. Nakajima, S. Hwang, Y. Filinchuk, H. Hagemann, T. R. Jensen, E. Akiba, Facile Synthesis of Metal Boron Hydrides for Fast Ionic Conductivity, 22nd World Hydrogen Energy Conference (WHEC2018), 2018.06, [URL]. |
| 50. | Hironori Nakajima, Kohei Sasaki, Kenta Dan, Özgür Aydın, Tatsuhiro Ochiai, Tatsumi Kitahara, Kohei Ito, In-plane Current Distribution in the Planar Solid Oxide Fuel Cell In-situ Identified by Segmented Cathodes, 22nd World Hydrogen Energy Conference (WHEC2018), 2018.06, [URL]. |
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| 57. | Shunzaburo Murakami, Hironori NAKAJIMA, Tatsumi KITAHARA, Anode-Supported Honeycomb Solid Oxide Fuel Cell Depending on the Flow Channel Configurations, 2017 The 3rd International Conference on Inventions, 2017.10. |
| 58. | Hironori Nakajima, Akiko Inada, Tatsumi Kitahara, Electrochemical Impedance Spectroscopy Study of the Electrode Microstructure of the Lithium-Ion Battery, 2017 The 3rd International Conference on Inventions, 2017.10. |
| 59. | Hironori Nakajima, Mass Transfer in the Solid Oxide Fuel Cell, 2017 The 3rd International Conference on Inventions, 2017.10. |
| 60. | Hironori NAKAJIMA, Tatsumi KITAHARA, Eisaku TSUDA, In-situ Segmented Electrode Analysis of In-plane Current Distributions in an Anode-Supported Planar Solid Oxide Fuel Cell for Marine Power Applications, The 11th International Symposium on Marine Engineering (ISME2017), 2017.10. |
| 61. | Tatsumi KITAHARA, Hironori NAKAJIMA, Kenta DAN, Impedance Spectroscopy to Prevent Performance Degradation Due to Sea Salt for Marine Polymer Electrolyte Fuel Cells, The 11th International Symposium on Marine Engineering (ISME2017), 2017.10. |
| 62. | Shunzaburo Murakami, Hironori NAKAJIMA, Tatsumi KITAHARA, Development of the Flow Channel Structure of an Anode-Supported Honeycomb Solid Oxide Fuel Cell for High Power Density, 2017 The 3rd International Conference on Inventions, SPINTECH Technology Thesis Awards Section, 2017.09, An anode-supported honeycomb solid oxide fuel cell (SOFC) gives high volumetric power density and improves thermo-mechanical durability at high temperatures. We have so far shown the promising power densities and investigated the effect of the internal flow channel assignments and the porous anode support thicknesses on the cell performance in terms of the hydrogen partial pressure distributions in the cell under operation. In this study, we measure ohmic resistances of the honeycomb cells by current interrupt method, and indicate the impact of Ni reoxidation in the anode support resulting in high internal ohmic resistances. Fuel depletion in the cell causes the Ni reoxidation, and deteriorates the performance of the honeycomb cell.. |
| 63. | Y. Wakita, Y. Tachikawa, H. Nakajima, and K. Ito, Glass Shape Change during Firing for Improving the Seal of Planar SOFCs, 15th International Symposium on Solid Oxide Fuel Cells (SOFC-XV), 2017.07, [URL]. |
| 64. | Ö. Aydın, H. Nakajima, and T. Kitahara, In Situ Measured Spatial Temperature Variations for Improving Reliability of Numerical SOFC Tools, 15th International Symposium on Solid Oxide Fuel Cells (SOFC-XV), 2017.07, [URL]. |
| 65. | T. Ochiai, H. Nakajima, T. Karimata, T. Kitahara, K. Ito, and Y. Ogura, In-Situ Analysis of the in-Plane Current Distribution Difference between Electrolyte-Supported and Anode-Supported Planar Solid Oxide Fuel Cells by Segmented Electrodes, 15th International Symposium on Solid Oxide Fuel Cells (SOFC-XV), 2017.07, [URL]. |
| 66. | H. Nakajima, T. Kitahara, and E. Tsuda, Segmented Electrode Analysis of an Anode-Supported Planar Solid Oxide Fuel Cell for the Diagnosis of Marine Power Applications, 15th International Symposium on Solid Oxide Fuel Cells (SOFC-XV), 2017.07, [URL]. |
| 67. | Liqing He, LI Hai-Wen, Hironori NAKAJIMA, Yaroslav Filinchuk, Hans Hagemann, Etsuo Akiba, Zhouguang Lu, Bimetallic Dodecaborate LiNaB12H12 and Its Application in All-solid-state Batteries, The 2017 MRS Spring Meeting and Exhibit, 2017.04, [URL]. |
| 68. | Hironori NAKAJIMA, Power Generation with an Anode-supported Honeycomb Solid Oxide Fuel Cell, 2017 International Conference on Smart Science, 2017.04. |
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| 72. | Tatsumi Kitahara, Hironori NAKAJIMA, Kenta Ishikawa, Gas Diffusion Layer Coated with a Microporous Layer Containing Hydrophilic CNTs to Enhance PEFC Performance without Humidification Using Anode Gas Recirculation, 230th Meeting of the Electrochemical Society (PRIME2016), 2016.10, [URL]. |
| 73. | Hironori NAKAJIMA, Tatsumi Kitahara, Impedance Spectra Associated with Metal Deposition at the Negative Electrode from Contaminated Metal Particles at the Positive Electrode in a Lithium Ion Battery, 230th Meeting of the Electrochemical Society (PRiME2016), 2016.10, [URL]. |
| 74. | Hua Li, Hironori NAKAJIMA, Kohei Ito, Optimization of Annealing Catalyst Powder for High Temperature PEMWE, 230th Meeting of The Electrochemical Society (PRiME 2016), 2016.10, [URL]. |
| 75. | Kohei Ito, Takuya Sakaguchi, Yuta Tsuchiya, Akiko Inada, Hironori NAKAJIMA, Ryo Saito, Gas Crossover Suppression by Controlling Wettability of Cathode Current Collector, 230th Meeting of The Electrochemical Society (PRiME 2016), 2016.10, [URL]. |
| 76. | Tatsuhiro OCHIAI, Hironori NAKAJIMA, Takahiro KARIMATA, Tatsumi KITAHARA, Kohei ITO, Yusuke OGURA, Jun SHIMANO, Direct Current Distribution Measurement of an Electrolyte-Supported Planar Solid Oxide Fuel Cell Under the Rib and Channel by Segmented Electrodes, 230th Meeting of the Electrochemical Society (PRiME2016), 2016.10, [URL]. |
| 77. | YanMing Hao, Hironori NAKAJIMA, Akiko Inada, Kazunari SASAKI, Kohei Ito, Separation and Characterization of Overpotentials in Electrochemical Hydrogen Pump with a Reference Electrode, 230th Meeting of The Electrochemical Society (PRiME 2016), 2016.10, [URL]. |
| 78. | Hironori NAKAJIMA, Akiko Inada, Tatsumi Kitahara, Impedance Spectra for Metal Deposition at the Negative Electrode in a Lithium Ion Battery from Dissolving Metal Particle Contaminants at the Positive Electrode, NGRC (Nucleation & Growth Research Conference) – International Workshop of Electrochemical/Materials Processing for Renewable Energy –, 2016.09, [URL]. |
| 79. | Hironori NAKAJIMA, Fundamentals of Solid Oxide Fuel Cell and electrochemical evaluation, School on Micro-Nanotechnology (MINATEC 2016), 2016.09. |
| 80. | LI Hai-Wen, Liqing He, Hironori NAKAJIMA, Yaroslav Filinchuk, Son-Jong Hwang, Hans Hagemann, Torben R. Jensen, Etsuo Akiba, Material Designing of Metal Boranes for Energy Storage, 15TH INTERNATIONAL SYMPOSIUM ON METAL-HYDROGEN SYSTEMS, MH 2016, 2016.08, [URL]. |
| 81. | Hironori NAKAJIMA, Tatsumi KITAHARA, Sou IKEDA, Fuel Distributions in Anode-Supported Honeycomb Solid Oxide Fuel Cells, 12th EUROPEAN SOFC & SOE FORUM, 2016.07, [URL]. |
| 82. | Özgür Aydın, Hironori NAKAJIMA, Tatsumi Kitahara, Accuracy of the Numerically Computed Spatial Current and Temperature Variations in SOFCs, 12th EUROPEAN SOFC & SOE FORUM, 2016.07, [URL]. |
| 83. | Sou IKEDA, Hironori NAKAJIMA, Tatsumi KITAHARA, ENHANCEMENT OF FUEL TRANSFER IN ANODESUPPORTED HONEYCOMB SOLID OXIDE FUEL CELLS, 7th European Thermal-Sciences Conference (EUROTHERM 2016), 2016.06, [URL]. |
| 84. | Hironori NAKAJIMA, Tatsumi KITAHARA, REAL-TIME ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY DIAGNOSIS OF THE MARINE SOLID OXIDE FUEL CELL, 7th European Thermal-Sciences Conference (EUROTHERM 2016), 2016.06, [URL]. |
| 85. | YanMing Hao, 中島 裕典, 稲田 顕子, 佐々木 一成, 伊藤 衡平, Overvoltage characterizations of electrochemical hydrogen pump with internal humidifier and anode dead-end channel, 第35回水素エネルギー協会大会, 2015.12. |
| 86. | Sou IKEDA, Shota KOTAKE, Hironori NAKAJIMA, Tatsumi KITAHARA, Mass Transfer Analysis of Anode-Supported Honeycomb Solid Oxide Fuel Cells, The 66th Annual Meeting of the International Society of Electrochemistry, 2015.10, [URL]. |
| 87. | Chiaki MIZUTANI, Tokuma MATSUMOTO, Hironori NAKAJIMA, Tatsumi KITAHARA, Kohei ITO, Analysis of MPL Impact in PEFC with in-Situ Temperature Measurement in through-Plane Direction, ECS Conference on Electrochemical Energy Conversion & Storage with SOFC-XIV, 2015.07. |
| 88. | Özgür Aydın, Hironori NAKAJIMA, Tatsumi Kitahara, Influence of Convective Heat Transfer By Air Flow on Local Current/Temperature Along Microtubular Solid Oxide Fuel Cells in-Situ Identified with Electrode-Segmentation Method for Co- and Counter-Flow Configurations, 14th International Symposium on Solid Oxide Fuel Cells (SOFC-XIV), 2015.07. |
| 89. | Takahiro KOSHIYAMA, Hironori NAKAJIMA, Takahiro KARIMATA, Tatsumi KITAHARA, Kohei ITO, Soichiro MASUDA, Yusuke OGURA, Jun SHIMANO, Direct Current Distribution Measurement of an Electrolyte-Supported Planar Solid Oxide Fuel Cell Under the Rib and Channel by Segmented Electrodes, 14th International Symposium on Solid Oxide Fuel Cells (SOFC-XIV), 2015.07. |
| 90. | Hironori NAKAJIMA, Tatsumi KITAHARA, Diagnosis Method to Detect the Incorporation of Metallic Particles in a Lithium Ion Battery, ECS Conference on Electrochemical Energy Conversion & Storage with SOFC-XIV, 2015.07. |
| 91. | D121 Improvement of current efficiency in polymer electrolyte electrolysis cell by controlling wettability High pressure PEECs (Polymer Electrolyte Electrolysis Cells) possibly suffer from hydrogen gas crossover driven by the large pressure difference between cathode and anode, and the crossover decreases the current efficiency. As a countermeasure of the crossover, controlling wettability of cathode porous current supplier is proposed here. Higher wettability may promote detachment of bubbles from the supplier, and reduce the retention time of the bubbles there, resulting in less crossover. This study evaluates this wettability effect on the crossover experimentally. Experiments with changing the wettability of the supplier revealed that higher wettability reduces the crossover and increases the current efficiency. However, under high pressure condition, the wettability effect does not appear clearly. In the experiments, accuracy in hydrogen crossover measurement value is important. This issue is addressed with the new measurement device which measures hydrogen concentration in oxygen evolution side.. |
| 92. | Özgür Aydın, Takahiro KOSHIYAMA, Hironori NAKAJIMA, Tatsumi Kitahara, Experimental Evaluation of Internal Hydrocarbon Reforming Reaction in Microtubular SOFCs by Segmentation Method, The 18th International Symposium on Batteries, Fuel Cells and Capacitors, 2014.11. |
| 93. | H112 Mass Transfer in an Anode-Supported Honeycomb Solid Oxide Fuel Cell An anode-supported honeycomb SOFC can achieve high volumetric power density and improve thermo-mechanical durability at high temperatures. We have so far fabricated the honeycomb cell with a cathode layer of LSM and an electrolyte layer of 8YSZ on a porous anode honeycomb substrate of Ni/8YSZ. The anode-supported honeycomb cell exhibited promising volumetric power densities. In the present study, current-voltage and current-power density characteristics of the cells having different porous substrate thicknesses and anode/cathode flow channel configurations are studied under different flow rates and partial pressures of fed hydrogen to clarify the effect of fuel transport in the anode porous substrate.. |
| 94. | H113 Current and Temperature Distribution Analyses for a Microtubular Solid Oxide Fuel Cell One of the problems of solid oxide fuel cells is current distribution since it decays total cell performance and efficiency. Current and temperature distributions also cause the electrode degradation thermo-mechanically and chemically. In particular, this behavior is complicated in the case of the hydrocarbon fuel. Elucidation of those distributions is therefore required to optimize the gas flow condition under operation, and to develop new cell design with higher performance and durability, and diagnosis method for the distribution. The aim of this work is thus to measure the current distribution in an anode-supported microtubular cell having segmented cathodes, comparing with the measured surface temperature at each segmented cathode caused by the current distribution.. |
| 95. | Hironori NAKAJIMA, Tatsumi KITAHARA, Yuta HIGASHINAKA, Yusaku NAGATA, Effect of Electrode Mixing Conditions on the Performance of Lithium-Ion Batteries Analyzed by Fast Fourier Transform Electrochemical Impedance Spectroscopy, 226th Electrochemical Society Meeting, 2014.10. |
| 96. | Tatsumi KITAHARA, Hironori NAKAJIMA, Kosuke OKAMURA, Influence of GDL Coated with MPL Containing CNTs on PEFC Performance under Low and High Humidity Conditions, 226th Electrochemical Society Meeting, 2014.10. |
| 97. | Kohei Ito, Yusuke Maeda, Takuya Sakaguchi, Akiko Inada, Hironori NAKAJIMA, Impact of Water Flow Rate on Current Efficiency in Solid Polymer Water Electrolyzer Under 2 MPa Condition, 226th Electrochemical Society Meeting, 2014.10. |
| 98. | Özgür Aydın, Takahiro KOSHIYAMA, Hironori NAKAJIMA, Tatsumi Kitahara, Impact of Inhomogeneous Fuel Distribution on Performance Degradation of Microtubular SOFCs Analyzed by Segmentation Method, 7th Kyushu University-KAIST Workshop, 2014.09. |
| 99. | Özgür Aydın, Takahiro KOSHIYAMA, Hironori NAKAJIMA, Tatsumi Kitahara, Spacial Characterization of Microtublar SOFCs by Segmentation Method, 第68回マテリアルズテーラリング研究会, 2014.07. |
| 100. | Takahiro KOSHIYAMA, Hironori NAKAJIMA, Tatsumi Kitahara, Current Distribution Measurements of a Microtubular Solid Oxide Fuel Cell Fed with Simulated Syngas, 20th World Hydrogen Energy Conference, 2014.06. |
| 101. | Hironori NAKAJIMA, Daeho Lee, Ming-Tsang Lee, Costas P. Grigoropoulos, HYDROGEN PRODUCTION WITH CuO/ZnO NANOWIRE CATALYST FOR A NANOCATALYTIC SOLAR THERMAL STEAM-METHANOL REFORMER, International Conference on Hydrogen Production ICH2P-2014, 2014.02. |
| 102. | Hironori NAKAJIMA, Performance of an Anode-Supported Honeycomb Solid Oxide Fuel Cell, THERMEC’2013, International Conference on PROCESSING & MANUFACTURING OF ADVANCED MATERIALS, 2013.12. |
| 103. | Tatsumi Kitahara, Hironori NAKAJIMA, Masaoki Inamoto, Kosuke Shinto, Influence of Triple MPL Coated GDL on the PEFC Performance under Low and High Humidity, 224th ECS Meeting, 2013.10. |
| 104. | Hironori NAKAJIMA, Tatsumi Kitahara, Kazuto Tsuda, Water Vapor Exchange Flow Channels to Enhance the Performance of Polymer Electrolyte Fuel Cells without Cathode Humidification, 224th ECS Meeting, 2013.10. |
| 105. | Kohei Ito, Yan Ming Hao, Hironori NAKAJIMA, Hiroshi Yoshizumi, Kazunari SASAKI, Electrochemical Characterization of Hydrogen Pump with Internal Humidifier and Dead-End Anode Channel, 224th ECS Meeting, 2013.10. |
| 106. | Shota Kotake, Hironori NAKAJIMA, Tatsumi Kitahara, Flow Channel Configurations of an Anode-Supported Honeycomb Solid Oxide Fuel Cell, 13th International Symposium on Solid Oxide Fuel Cells, 2013.10. |
| 107. | Akira Shimizu, Hironori NAKAJIMA, Tatsumi Kitahara, Current Distribution Measurement of a Microtubular Solid Oxide Fuel Cell, 13th International Symposium on Solid Oxide Fuel Cells, 2013.10. |
| 108. | I112 Performance of an Anode-Supported Honeycomb Solid Oxide Fuel Cell with Different Flow Channel Configurations An anode-supported honeycomb SOFC can achieve high power density and improve thermo-mechanical durability at high temperatures. We have fabricated the honeycomb cell with an electrolyte layer of 8YSZ on an anode honeycomb substrate of Ni/8YSZ. The cathode layer is LSM-YSZ composite. Current-voltage and current-power density characteristics of the cells having different anode and cathode flow channel configurations are measured under different hydrogen flow rates and partial pressures. We also evaluate the hydrogen mole fraction distributions in the honeycomb cell using finite element method, and discuss appropriate anode and cathode flow channel configurations.. |
| 109. | I113 Experimental Analysis of the Current Distribution in a Microtubular Solid Oxide Fuel Cell Fuel starvation in the downstream part of the flow channel in a solid oxide fuel cell decays the cell performance giving rise to current distribution. In particular, this behavior is complicated in the case of the hydrocarbon fuel. Elucidation of the current distribution is therefore required to optimize the gas flow condition under operation, and to develop new cell design and diagnosis method for the distribution. We have thus measured the current distribution in an anode-supported microtubular cell having segmented cathodes under different fuel flow rates at around 800℃.. |
| 110. | I134 Measurement and analysis of proton conductivity in polymer electrolyte membrane under sub-zero degree One of the technical problems for the commercialization of FCV is a sub-zero performance improvement. During 0℃ to -30℃, generation water in channel and GDL freezes. Therefore, gas supply is obstructed and diffusion overvoltage increases. The solution has been solved by the optimization of the purge condition and the improvement of the heater. On the other hand, under the extremely low temperature less than -30℃, the water even in polymer electrolyte membrane freeze, the conductivity of the proton decreases and the operation of PEFC cannot start. This problem does not have a solution. The key to the solution is to make clear the drop mechanism of the proton conductivity due to the solidification of the generation water. This paper investigates the transport property of the proton under sub-zero degree.. |
| 111. | I141 Investigation of generated water phase in PEFC based on equilibrium potential To achieve the high performance of PEFC, understanding generated water phase (liquid and gas) in it is an important issue. In this study, we try to clarify the phase through open circuit voltages (OCVs) for a cell. We experimentally investigated the OCVs under the pressure of 1 atm and temperature of 40℃, with changing the humidity of supplied gases and compared theoretical potentials estimated by the Nernst equation, with considering hydrogen crossover and cathode Pt oxidation. The measured OCVs decreased with increasing the relative humidity. This characteristic corresponded to the prediction by the theory. However, the quantitative agreement between them was not obtained. This considered to be caused by the dynamic change of OCVs.. |
| 112. | R. Matsumoto, H. Nakajima, and T. Kitahara, Current Distribution in a Microtubular SOFC Estimated from Temperature Measurement, The 51th Battery Symposium in Japan. |
| 113. | Recovery System of Cathode Water Vapor for Enhancing PEFC Performance under No-humidification, The 51th Battery Symposium in Japan. |
| 114. | MPL Coated GDL for Enhancing PEFC Performance under No-humidification at cathode, The 51th Battery Symposium in Japan. |
| 115. | T. Jo, H. Nakajima, and T. Kitahara, Research on a Test Method for the Incorporation of Metallic Particles in a Lithium Ion Battery, The 51th Battery Symposium in Japan. |
| 116. | Performance Evaluation of Lithium-Ion Batteries by AC Impedance Spectroscopy. |
| 117. | Influences of Anode Gas Recirculation and Gas Diffusion Layer on PEFC performance under No-Humidification at Cathode, The 50th Battery Symposium in Japan.. |
| 118. | MPL Coated GDL with a Hydrophilic Layer for Enhanced PEFC Performance under No-Humidification，The 50th Battery Symposium in Japan. |
| 119. | MPL Coated GDL with a Hydrophilic Layer for Enhanced PEFC Performance under No-Humidification，The 50th Battery Symposium in Japan. |
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