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

Effect of the Hydrophilic Layer in Double Microporous Layer Coated Gas Diffusion Layer on PEFC Performance, ECS Transactions, Vol.109, No.9, pp.85-93

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

Hydrophilic and Hydrophobic Microporous Layer Coated Gas Diffusion Layer for Enhancing PEFC Performance, ECS Transactions, Vol.104, No.8, pp.117-127

Language：English   Publishing type：Research paper (international conference proceedings)  

Diagnosis of Abnormal Operational Conditions and Performance Enhancement of Marine Fuel Cells, Proceedings of the 29th CIMAC World Congress on Combustion Engines Technology for Ship Propulsion, Power Generation, Rail Traction, Paper No.21, pp.1-13

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

Gas Diffusion Media and NaCl contamination of Polymer Electrolyte Fuel Cells for Marine Applications, ECS Transactions, Vol.86, No.13, pp.271-279

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

Impedance Spectroscopy to Prevent Performance Degradation due to Sea Salt for Marine Polymer Electrolyte Fuel Cells, Journal of The Japan Institute of Marine Engineering, Vol.53, No.3, pp.417-422

Language：English   Publishing type：Research paper (international conference proceedings)  

Impedance Spectroscopy to Prevent Performance Degradation due to Sea Salt for Marine Polymer Electrolyte Fuel Cells, Proceedings of the 11th International Symposium on Marine Engineering, pp.456-461

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

Microporous Layer-coated Gas Diffusion Layer for Performance Enhancement of Polymer Electrolyte Fuel Cells without Humidification Using Anode Gas Recirculation, Journal of The Electrochemical Society, Vol.163, No.13, pp.F1366-F1372

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

Gas Diffusion Layer Coated with a Microporous Layer Containing Hydrophilic CNTs to Enhance PEFC Performance without Humidification Using Anode Gas Recirculation, ECS Transactions, Vol.75, No.14, pp.209-217

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

Microporous Layer-Coated Gas Diffusion Layer to Reduce Oxygen Transport Resistance in a Polymer Electrolyte Fuel Cell under High Humidity Conditions , International Journal of Hydrogen Energy, pp.9547-9555

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

Influence of Hydrophilic and Hydrophobic Triple MPL Coated GDL on the Oxygen Transport Resistance in a PEFC under High Humidity Conditions, ECS Transactions, Vol.69, No.17, pp.1313-1322

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

Gas Diffusion Layers Coated with a Microporous Layer Containing Hydrophilic Carbon Nanotubes for Performance Enhancement of Polymer Electrolyte Fuel Cells under both Low and High Humidity Conditions, Journal of Power Sources, Vol.283, pp.115-124

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

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

Influence of GDL Coated with MPL Containing CNTs on PEFC Performance under Low and High Humidity Conditions ,Vol.64, No.3, 477-483

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

Triple Microporous Layer Coated Gas Diffusion Layer for Performance Enhancement of Polymer Electrolyte Fuel Cells under both Low and High Humidity Conditions, Journal of Power Sources, Vol.248, pp.1256-1263

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

Influence of Triple MPL Coated GDL on the PEFC Performance under Low aand High Humidity,Vol.58, No.1, pp.1401-1408

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

Novel Hydrophilic and Hydrophobic Double Microporous Layer Coated Gas Diffusion Layer to Enhance Performance of Polymer Electrolyte Fuel Cells under both Low and High Humidity, Journal of Power Sources, Vol.234, pp.129-138

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

Influence of Hydrophilic and Hydrophobic Double MPL Coated GDL on PEFC Performance

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

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

Water Vapor Exchange System Using a Hydrophilic Microporous Layer Coated Gas Diffusion Layer to Enhance Performance of Polymer Electrolyte Fuel Cells without Cathode Humidification, Journal of Power Sources, Vol.214, pp.100-106

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

Hydrophilic and Hydrophobic double MPL Coated Gas Diffusion Layer for Enhanced Performance of Polymer Electrolyte Fuel Cells under No-Humidification at the Cathode, Journal of Power Sources, Vol.199, pp.29-36

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

Hydrophilic and Hydrophobic Double MPL Coated GDL to enhance PEFC Performance under Low and High Humidity Conditions

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

Influences of Microporous Layer Design Parameters for Gas Diffusion Layer on Permeability and PEFC Performance, Journal of Environment and Engineering, Vol.6, No.1, pp.17-27

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

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

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

Influence of Hydrophilic and Hydrophobic Double MPL Coated GDL on PEFC Performance without Cathode Humidification

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

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

Microporous Layer Coated Gas Diffusion Layer for Enhanced Performance of Polymer Electrolyte Fuel Cells

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

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

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

Influence of Gas Diffusion Layers with Microporous Layer on the Performance of Polymer Electrolyte Fuel Cells

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

Effects of Design Parameters in Paper Type Gas Diffusion Layer on the Performance of Polymer Electrolyte Fuel Cells

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

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

Best Combination of Gas Diffusion Layers for Polymer Electrolyte Fuel Cell under Cathode Condition of Very Low Humidity

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

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

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

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

Language：English   Publishing type：Research paper (international conference proceedings)  

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

Vibration Monitoring to Diagnose Incipient Seizure of Crosshead Bearings

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

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

Influence of Taper Geometry Modified Oil-Grooves on Load Carrying Capacity of Crosshead Bearings

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

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

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

大形ディーゼル機関のピストンリングとシリンダライナの潤滑状態は苛酷であり，スカッフィング発生を防止することが重要な課題である。本論文ではシリンダ油の油膜拡がり性と耐スカッフィング性が密接に関連していることを示し，高塩基価シリンダ油の耐スカッフィング性を向上させる方策として，耐熱分散剤および拡がり性向上剤の添加により油膜拡がり性を改善させると同時に，極圧剤を添加することが有効であることを明らかにした。

Language：English   Publishing type：Research paper (international conference proceedings)  

Detection of Abnormal Vibration to Prevent Seizure of Crosshead Bearings in Large Two-Stroke Diesel Engines

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

Monitoring of Abnormal Vibration to Prevent Seizure of Crosshead Bearings

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

Language：English   Publishing type：Research paper (international conference proceedings)  

Improved Load-Carrying Capacity of Crosshead Bearings by Incorporating Taper Geometry in Oil Grooves

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

大形２サイクルディーゼル機関のクロスヘッド軸受は，軸受面に形成される油膜が薄く焼損や破損を起こしやすい滑り軸受であり，損傷発生を防止して機関の信頼性を向上させる方策を検討することが重要な課題である。本研究ではクロスヘッド軸受の振動状態，油膜形成状態，並びに軸受温度をモニタリングすることにより，摺動面に苛酷な固体接触が発生した初期段階で潤滑状態の異常を検出し，焼付き発生を防止する診断法について開発した。

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

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

Language：English   Publishing type：Research paper (international conference proceedings)  

Influence of Used Oil on Piston Ring Friction

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

Language：English   Publishing type：Research paper (international conference proceedings)  

Development of Lead-Free Tin-Copper Overlay Plated Aluminum-Tin Alloy for Crosshead-Pin Bearings

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

Language：Japanese   Publisher：The Japan Institute of Marine Engineering  

DOI： 10.5988/jime.59.463

CiNii Research

Language：Japanese   Publisher：The Japan Institute of Marine Engineering  

DOI： 10.5988/jime.59.399

CiNii Research

Language：Japanese   Publisher：The Japan Institute of Marine Engineering  

DOI： 10.5988/jime.59.131

CiNii Research

Language：Japanese   Publisher：The Japan Institute of Marine Engineering  

DOI： 10.5988/jime.59.173

CiNii Research

Language：Japanese   Publisher：The Japan Institute of Marine Engineering  

DOI： 10.5988/jime.59.179

CiNii Research

Language：Japanese   Publisher：The Japan Institute of Marine Engineering  

DOI： 10.5988/jime.59.132

CiNii Research

Publisher：Journal of the Electrochemical Society  

A novel microporous layer (MPL) coated gas diffusion layer (GDL) is developed to improve water management of polymer electrolyte fuel cells (PEFCs) by incorporating hydrophobic and hydrophilic pores within the same layer. This MPL expels excess water at the interface between the catalyst layer and MPL through hydrophilic pores while maintaining efficient oxygen transport through hydrophobic pores, reducing oxygen transport resistance under high humidity conditions. The water permeability and relative oxygen permeance tests demonstrate the presence of separate hydrophobic and hydrophilic pores in the appropriate composite MPL. The effects of combinations of hydrophilic and hydrophobic binders used in the composite MPLs on the oxygen transport resistance are evaluated. The hydrophobic polytetrafluoroethylene (PTFE) binder and the hydrophilic polyvinyl alcohol (PVA) binder cannot enhance performance due to mismatched sintering temperatures. Although the hydrophobic polyvinylidene fluoride (PVDF) and PVA binders have the same sintering temperature, the performance was degraded due to the strong hydrophilicity of PVA. Another combination of composite MPL incorporates hydrophobic PVDF and Nafion binders. Hydrophilic TiO2 particles are introduced in the Nafion binder to reinforce the hydrophilicity. The appropriate composite MPL significantly reduced the total oxygen transport resistance compared to those obtained with the hydrophobic MPL.

DOI： 10.1149/1945-7111/ad170d

Web of Science

Scopus

Publisher：Journal of the Electrochemical Society  

Water flooding under high current and humidity conditions is a main barrier to enhancing the performance of polymer electrolyte fuel cells (PEFCs). This study evaluated a double microporous layer (MPL) coated gas diffusion layer (GDL) consisting of a thin hydrophilic layer coated on a hydrophobic MPL coated GDL. An accurate measurement of the contact angle was introduced to assess the wettability of the MPL. Besides, the water breakthrough pressure and water vapor permeance values were measured to evaluate the water transport ability of the MPL. The oxygen transport resistance was measured using the limiting current density in polarization curves. Appropriate hydrophilic MPL containing 5% Nafion, 25% TiO2, and carbon black in the double MPL enhanced the ability of the GDL to discharge water at the catalyst layer, effectively reducing water flooding. The total oxygen transport resistance obtained with the double MPL was reduced by about 20% compared to that obtained with a hydrophobic MPL. Moreover, the pressure-independent and pressure-dependent resistances were separated from the total oxygen transport resistance measured under various back pressure conditions. The double MPL exhibited a substantially reduced pressure-independent resistance at the interface between the MPL and the catalyst layer.

DOI： 10.1149/1945-7111/ad13da

Web of Science

Scopus

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

Self-Supporting Microporous Layer for Polymer Electrolyte Fuel Cells, ECS Transactions, Vol.112, No.4, p.83-91

Publisher：SAE Technical Papers  

Regarding the solution for various issues on engine tribology, in order to understand the involvement of temperature in the friction and scuffing under the mixed and/or boundary lubrication regime, the two cases of piston ring & cylinder liner and cam & tappet were analytically studied. The friction between sliding interfaces is composed of four shear stresses from the viscous oil-films, the adsorbed oil molecules, the tribofilms due to oil additives, and the true metal contacts on surface asperities. Since all the shear stress have exponential temperature dependences, the relationship between the frictional shear stress and temperature is assumed to be expressed by the Arrhenius equation. Through analyzing friction data measured in laboratory tests conducted under the same temperature and sliding conditions as during the break-in of engines, various levels of temperature involvement were clarified.

DOI： 10.4271/2023-32-0115

Scopus

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

Analytical Study on Involvement of Temperature in Friction and Scuffing for Engine Tribo-Components, SAE Transactions, No.2023-32-0115, pp.1-21

Language：Japanese   Publisher：The Japan Institute of Marine Engineering  

DOI： 10.5988/jime.58.433

CiNii Research

Language：Japanese   Publisher：The Japan Institute of Marine Engineering  

DOI： 10.5988/jime.58.496

CiNii Research

Language：English   Publishing type：Research paper (international conference proceedings)  

Analytical Study on Involvement of Temperature in Friction and Scuffing of Sliding Surface in an Engine, Proceedings of the 309th CIMAC World Congress on Combustion Engines Technology for Ship Propulsion, Power Generation, Rail Traction, Paper No.185, pp.1-17

Publisher：Journal of Power Sources  

The gas diffusion layers (GDLs) of polymer electrolyte fuel cells have been developed with applying microporous layers (MPLs) in their catalyst layer (CL) side to alleviate the accumulation of liquid water in the CL for oxygen transport to the cathode CL. A three-dimensional porous structure of our in-house hydrophobic MPL is numerically modeled with a pore network model (PNM). The convective air permeability and oxygen diffusivity, which depend on liquid saturation, are evaluated. To construct the PNM, focused ion beam scanning electron microscopy (FIB-SEM) is used to derive the pore size distribution (PSD). The model is ex-situ validated through air permeability and oxygen diffusivity tests with controlled saturation of non-volatile wetting liquid that is stable in the hydrophobic MPL. Oxygen diffusivity of the MPL is obtained by identifying the diffusion resistances of the concentration boundary layers and GDL substrate in the tests. The model predicts the effects of liquid water saturation in the MPL on the air and liquid water permeations, and the oxygen diffusion, and thus can be used to design optimal PSDs for practical cells.

DOI： 10.1016/j.jpowsour.2023.232677

Web of Science

Scopus

Language：Japanese   Publisher：The Japan Institute of Marine Engineering  

<p>  Similar to vehicle engines, marine engines are required to realize zero emissions of poisonous gas like SO_x and GHG like CO_2. Therefore, fuels used for future engines will be needed to reduce the content of sulfur and carbon. Under such requirements, the lubricated sliding interface of a piston ring and a cylinder liner often suffers damage, such as excessive wear and scuffing failure, caused by changes in lubrication condition due to in-cylinder combustion and/or fuel-derived substances mixed in the lubricating oil. Given this, appropriate measures are eagerly required to prevent such damage. The thermal friction characteristics of the ring / liner interface under the mixed / boundary lubrication regime during engine break-in procedure are thought to be almost the same as those of cam / tappet under the boundary lubrication regime when using low-viscosity lubricating oil with additives, which was the key subject the authors investigated in their previous study. By analyzing changes in frictional shear stress and the surface temperature and examining a correlation between them, just like the Arrhenius’ equation, it has been clarified that the temperature of the interface displays lubrication functions that can reduce friction, wear and scuffing. Concerning the viscosity and additives of the lubricating oil, the surface roughness of the interface, the ring profile, the contact pressure and the sliding velocity the authors have also investigated how the surface temperature contributed to reducing friction. To this aim, they analyzed the ring / liner data measured with a rotary disk type reciprocating friction test apparatus, which makes it possible to detect the friction force and the ring temperature under the same contact pressure and sliding velocity as those during engine break-in procedure.</p>

DOI： 10.5988/jime.58.104

CiNii Research

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

Pore Network Modeling of a Microporous Layer for Polymer Electrolyte Fuel Cells under Wet Conditions, Journal of Power Sources, Vol.560, No.232677, pp.1-7

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

Publisher：International Journal of Hydrogen Energy  

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

Web of Science

Scopus

Publisher：Journal of Power Sources  

Under high current density operation, the efficiency of polymer electrolyte fuel cells (PEFCs) can dramatically decrease. This is due to water accumulation at the cathode side, preventing oxygen diffusion to the electrocatalyst. As such, effective water management is of vital importance by use of a suitable gas diffusion layer (GDL) and/or microporous layer (MPL). MPLs generally consist of carbon black as the porous electron conducting phase, and polytetrafluoroethylene (PTFE) as a hydrophobic binder. Here, we instead use superhydrophobic fluorinated carbon powder in the MPL as a novel material to decrease the required PTFE content. It is confirmed that the water contact angle of the MPL can be increased from 131° to 151° by using fluorinated carbon. Moreover, the fluorinated carbon MPL shows lower oxygen transport resistance at high humidity. Furthermore, in single fuel cell tests at various temperatures and relative humidity values, the I–V performance is significantly and consistently better than for the conventional MPL. These results confirm that fluorinated carbon is a promising new material for water management in the MPLs of PEFCs.

DOI： 10.1016/j.jpowsour.2022.232098

Web of Science

Scopus

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

Cold Start Cycling Durability of Fuel Cell Stacks for Commercial Automotive Applications, Vol.47, pp.41111-41123

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

Superhydrophobic Fluorinated Carbon Powders for Improved Water Management in Hydrogen Fuel Cells, Journal of Power Sources, Vol.548, No. 232098, pp.1-11

Language：Japanese   Publisher：The Japan Institute of Marine Engineering  

DOI： 10.5988/jime.57.407

CiNii Research

Language：Japanese   Publisher：The Japan Institute of Marine Engineering  

DOI： 10.5988/jime.57.469

CiNii Research

Language：Japanese   Publisher：The Japan Institute of Marine Engineering  

<p>  As low-viscosity oil is used more widely to reduce friction losses in IC engines, concerns are growing about an increase in friction, wear and scuffing at the sliding surfaces on tribo-components. The authors conducted an analytical study on thermal friction characteristics of boundary lubrication based on the physical and chemical properties of interface materials and lubricants. The study was intended to investigate the effect of temperature on the function of oil additives as a friction modifier and/or anti-scuffing agent. Three low viscosity base oils, three extreme pressure and anti-wear agents and two organo-molybdenum friction modifiers were used to measure friction changes with a cam/follower test apparatus. The authors analyzed a relationship between friction and temperature in the running-in process of interfaces in consideration of the functional sensitivity of additives in low-viscosity oils. This analysis was focused on physicochemical properties on the basis that the oil viscosity, the adsorption of oil molecules, the chemical reaction of oil additives that forms a tribo-film low in shear stress, and the strength of interface materials are all under the influence of the exponential function of temperature, just like the Arrhenius’ equation. The results of the analysis found that the frictional shear stress changes depending on the intensity of involvement of surface temperature that affects oil viscosity, molecular adsorption / desorption and tribo-film formation in each running-in term.</p>

DOI： 10.5988/jime.57.373

CiNii Research

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

Publisher：Journal of the Electrochemical Society  

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

Web of Science

Scopus

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

Accelerated Durability Testing of Fuel Cell Stacks for Commercial Automotive Applications: A Case Study, Journal of The Electrochamical Sociaty, Vol.169, No.044523, pp.1-10

Language：Japanese   Publisher：The Japan Institute of Marine Engineering  

DOI： 10.5988/jime.57.3

CiNii Research

Language：Japanese   Publisher：The Japan Society of Mechanical Engineers  

<p>Energy losses inherit in PEFC structure was analyzed to find optimum cell structure. As for a representative cell, JARI cell was examined and analyzed with simple model. In the model, the losses are calculated with distinguishing current loss, mass transport loss, heat flow loss, which are irreversible losses when current, mass transport and heat flow occur in cell. Loss analysis found that current loss, in particular activation overvoltage, is the largest of the components, and current loss determines the efficiency of the fuel cell. An enlarged electrode area embedded in the cell was proposed to reduce the current loss. Since there is a trade-off relationship between the three losses, we calculated the electrode area so that the total loss is minimized. We also examined the effect of expanding the electrode area on the output density.</p>

DOI： 10.1299/jsmepes.2022.26.d133

CiNii Research

Publisher：Proceedings of WHEC 2022 - 23rd World Hydrogen Energy Conference: Bridging Continents by H2  

Liquid water accumulated in the catalyst layer and gas diffusion layer (GDL) of a polymer electrolyte fuel cell (PEFC, PEMFC) results in performance deterioration due to inhibition of transport of the reactant oxygen in the cathode (Flooding). To enhance the drainage in the GDL, the application of a microporous layer (MPL) is effective to the catalyst layer side of the GDL substrate. To elucidate the effects of two-phase flow on the oxygen transport in an MPL for its optimized designs, we model three-dimensional porous structures of in-house MPLs with pore network model (PNM) for convective air permeation and oxygen diffusion. Pore diameter distribution derived by a focused ion beam scanning electron microscope is employed in the PNM. Air permeation measurements combined with oxygen diffusion measurements with changing liquid saturation by using gas chromatography validate the model.

Scopus

Publisher：ECS Transactions  

Water management is always one of the main problems of polymer electrolyte fuel cells performance enhancement because it dramatically influences oxygen transport resistance. Typically, the MPL coated GDL with strong hydrophobicity effectively prevents flooding between the catalyst layer and the MPL. To further improve PEFC performance, directly coating an extra hydrophilic MPL on the hydrophobic MPL coated GDL as double MPL can further promote performance. The double MPL using Nafion binder cannot provide enough hydrophilicity to lower the oxygen transport resistance. Combining utilization of the Nafion and TiO2 is efficacious in decreasing the breakthrough pressure and contact angle and ameliorating water drainage from the MEA so that the gas transport ability can be improved. Besides, the appropriate thickness of the double MPL was investigated to better design the double MPL coated GDL.

DOI： 10.1149/10909.0085ecst

Scopus

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

Mass Transfer in Microporous Layers for Polymer Electrolyte Fuel Cells Analyzed with Pore Network Modeling, ECS Transactions, Vol.104, No.8, pp.129-135

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

Pore Network Modeling of Hydrophilic / Hydrophobic Composite Microporous Layers for Polymer Electrolyte Fuel Cells, ECS Transactions, Vol.104, No.8, p.157-160

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

Impedance Diagnosisi of Abnormal Operational Conditions to Enhance Reliability of Marine Fuel Cells, Award Paper 2019, AP2, pp.1-16

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

Electrochemical Impedance Diagnosis of Abnormal Operational Conditions for Reliability of Polymer Electrolyte Fuel Cells in Marine Power Application -Sea Salt Contamination-, ECS Transactions, Vol.92, No.8, pp.341-349

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

Influence of Carbon Deposition on the Current Distribution in an Anode-Supported Planar Solid Oxide Fuel Cell In-Situ Assessed by Segmented Electrodes, ECS Transactions, Vol.91, No.1, pp.549-554

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

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

Mass Transport Limitation in the Inlet Periphery of Fuel Cells: Studied on a Planar Solid Oxide Fuel
Cell, Vol.43, pp.17420-17430

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

Real-Time Electrochemical Impedance Spectroscopy Diagnosis of the Solid Oxide Fuel Cell for Marine Power Applications, Vol.54, No.8, pp.2551-2558

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

Three-Dimensional Flow Channel Arrangements in an Anode-supported Honeycomb Solid Oxide Fuel Cell, Vol.54, No.8, pp.2545-2550

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

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

Segmented Electrode Analysys of an Anode-Supported Planar Solid Oxide Fuel Cell for Diagnosis of Marine Power Applications, Vol.78, No.1, pp.2109-2113

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

In-situ Analysis of the In-plane Current Distribution Difference Between Electrolyte-Supported Planar Solid Oxide Fuel Cells by Segmental Electrodes, Vol.78, No.1, pp.2203-2209

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

In Situ Measured Spatial Temperature Variations for Improving Reliability of Numerical SOFC Tools, Vol.78, No.1, pp.2191-2201

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

Impedance Spectra Associated with Metal Deposition at the Negative Electrode from Contaminated Metal Particles at the Positive Electrode in a Lithium Ion Battery, Vol.75, No.23, pp.27-36

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

In-Situ Analysis of the in-Plane Current Distributions in an Electrolyte-Supported Planar Solid Oxide Fuel Cell by Segmented Electrodes, Vol.75, No.52, pp.91-98

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

Real-Time Electrochemical Impedance Spectroscopy Diagnosis of the Marine Solid Oxide Fuel Cell, Vol.745, No.032149, pp.1-8

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

Enhanced of Fuel Transfer in Anode-supported Honeycomb Solid Oxide Fuel Cells, Vol.745, No.032082, pp.1-7

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

Reliability of the Numerical SOFC Models for Estimating the Spatial Current and Temperature Variations , Vol.41, pp.15311-15324

Language：English   Publishing type：Research paper (international conference proceedings)  

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

Processes Involving in the Temperature Variations in Solid Oxide Fuel Cells In-Situ Analyzed Through Electrode-Segmentation Method, Vol.163(3), pp.F216-F224

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

Effect of Through-plane Polytetrafluoroethylene Distribution in Gas Diffusion Layers on Performance of Polymer Electrolyte Fuel Cells, Vol.306, pp.289-299

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

Current and Temperature Distributions In-situ Acquired by Electrode-Segmentation along a Microtubular Solid Oxide Fuel Cell Operating with Syngas, Vol.293, pp.1053-1061

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

Diagnosis Method to Detect the Incorporation of Metallic Particles in a Lithium-Ion Batteriy,Vol.68, No.2, pp.59-74

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

Influence of Convective Heat Transfer by Air Flow on Local Current/Temperatures along Microtubular Solid Oxide Fuel Cells In-Situ Identified by Electrode-Segmentation Method for Co- and Counter-Flow Configurations, Vol.68, No.1, pp.2141-2150

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

Direct Current Distribution Measurement of an Electrolyte-Supported Planar Solid Oxide Fuel Cell under the Rib and Channel by Segmented Electrodes, Vol.68, No.1, pp.2141-2150

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

Mass Transfer in an Anode-Supported Honeycomb Solid Oxide Fuel Cell, Vol.64, No.45, pp.135-142

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

In-situ Diagnosis and Assessment of Longitudinal Current Variation by Electrode-Segmentation Method in Anode-Supported Microtubular Solid Oxide Fuel Cells, Vol.279, pp.218-223

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

Effect of Electrode Mixing Conditions on the Performance of Lithium-Ion Batteries Analyzed by Fast Fourier Transform Electrochemical Impedance pectroscopy,Vol.64, No.22, pp.87-95

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

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

Comparison of Humidified Hydrogen and Partly Pre-Reformed Natural Gas as Fuel for Solid
Oxide Fuel Cells Applying Computational Fluid Dynamics, Vol.77, pp.1008-1022

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

Effect of Through-plane Distribution of Polytetrafluoroethylene in Carbon Paper on In-plane Gas Permeability, Vol.248, pp.822-830

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

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

Water Vapor Exchange Flow Channels to Enhance the Performance of Polymer Electrolyte Fuel Cells without Cathode Humidification,Vol.58, No.1, pp.1799-1805

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

Current Distribution Measurement of a Microtubular Solid Oxide Fuel Cell

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

Flow Channel Configurations of an Anode-supported Honeycomb Solid Oxide Fuel Cell

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

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

Performance Evaluation of an Anode-supported Honeycomb Solid Oxide Fuel Cell

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

In-plane Liquid Water Distribution at the Interface Between the Gas Diffusion Layer and Catalyst Layer in the Cathode of a Polymer Electrolyte Fuel Cell with a Hybrid Pattern Flow Field

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

近年の大形ディーゼル機関は高効率・高出力化が進み，ピストンリングとシリンダライナ摺動面の潤滑状態が苛酷化する傾向にあり，高温下におけるシリンダ油の耐スカッフィング性を向上させることが重要な研究課題になっている．本論文では高温下におけるシリンダ油の油膜拡がり性と耐スカッフィング性が密接に関連していることを明らかにしたうえで，油膜拡がり性を改善し耐スカッフィング性を向上させる方策として，シリンダ油中のフェネート配合量を増大させるとともに酸化防止剤を添加することによりカルボン酸の生成を抑制することが重要であることを明らかにした。

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

Evaluation of Tribological Properties of Bearing Materials for Marine Diesel Engines Utilizing Acoustic Emission Technique

Language：English   Publishing type：Research paper (international conference proceedings)  

Effect of Gas Flow Channel without Cathode Humidification Analyzed with Electrochemical Impedance Spectroscopy

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

Current Distribution Analysis of a Microtubular Solid Oxide Fuel Cell with Surface Temperature Measurements

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

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

Electrochemical Impedance Spectroscopy Analysis of an Anode-Supported Microtubular Solid Oxide Fuel Cell

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

Development of a PEFC with Serpentine-Interdigitated Hybrid Pattern Gas Channels

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

Effect of Flow Field Pattern and Microporous Layer on Gas Purge of a Polymer Electrolyte Fuel Cell

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

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

Language：English   Publishing type：Research paper (international conference proceedings)  

Thermal Degradation and Scuffing Resistance of Marine Cylinder Oil under High Temperature

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

Thermal Analysis of a Micro Tubular Solid Oxide Fuel Cell Using Electrochemical Impedance Spectroscopy

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

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

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

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

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

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

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

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

Electrochemical Impedance Parameters for the Diagnosis of a Polymer Electrolyte Fuel Cell Poisoned by Carbon Monoxide in Reformed Hydrogen Fuel

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

Estimation of Water Layer Thickness Adjacent to the Cathode Catalyst Layer of a PEFC

Language：English   Publishing type：Research paper (international conference proceedings)  

An Analytical Study on the Mixed Lubrication of a Piston Ring Pack in a Reciprocating Engine

Language：English   Publishing type：Research paper (international conference proceedings)  

Studies on Reduction of Frictional Power Loss for Diesel Engine

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

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

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

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

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

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

Language：English   Publishing type：Research paper (international conference proceedings)  

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

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

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：English   Publishing type：Research paper (international conference proceedings)  

Studies on Microtopography of Oil-Film for Piston Rings

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

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

Language：English   Publishing type：Research paper (international conference proceedings)  

Characteristics of Trouble-Making Bunker Fuel Oil

Language：English   Publishing type：Research paper (international conference proceedings)  

Studies on Tribology between Cylinder Liner and Piston Ring in Marine Diesel Engine-Past 30 years

Language：Others   Publishing type：Research paper (international conference proceedings)  

How to Detect Trouble-making Bunker Fuel Oil

Language：Japanese  

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

Effects of Lubricant Viscosity on the Mixed Lubrication of a Piston Ring Pack in an Internal Combustion Engine

Publishing type：Research paper (international conference proceedings)  

Effects of Lubricant Viscosity on the Mixed Lubrication of a Piston Ring Pack in an Internal Combustion Engine

Language：English   Publishing type：Research paper (international conference proceedings)  

Some Studies on the Tribology of Diesel Engines

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

Studies on the Mixed Lubrication of Piston Rings

Language：English   Publishing type：Research paper (international conference proceedings)  

Mixed Lubrication of a Crosshead-Pin Bearing in a Large Marine Diesel Engine

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

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

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

Improvement of Lubrication for Cam and Follower

DOI： 10.1080/10402009908982279

Language：English   Publishing type：Research paper (international conference proceedings)  

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

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

Language：English   Publishing type：Research paper (international conference proceedings)  

Friction Characteristics of Piston Rings in a Diesel Engine

Language：English   Publishing type：Research paper (international conference proceedings)  

Mixed Lubrication of an Oil-Control Ring in a Piston Engine

Language：English   Publishing type：Research paper (international conference proceedings)  

Piston Assembly Friction and Wear: The influence of Lubricant Viscometry

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

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

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

Studies on Friction Characteristics of Reciprocating Engines

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

Characteristics of Piston Ring Friction (Influences of Lubricating Oil Properties)

Language：English   Publishing type：Research paper (international conference proceedings)  

Studies on the Friction Characteristics of Piston Rings in Internal Combustion Engines

Language：English   Publishing type：Research paper (international conference proceedings)  

Measurement Method of Total Friction Loss in Internal Combustion Engines

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

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

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

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

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

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

Friction Characteristics of Piston Rings in a Reciprocating Engine

Language：English   Publishing type：Research paper (international conference proceedings)  

Studies on the Friction Characteristics of Piston Ring in a Diesel Engine

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

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

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

Piston Ring Friction in Internal Combustion Engines

DOI： 10.1016/0301-679X(92)90027-K

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

Language：English   Publishing type：Research paper (international conference proceedings)  

Friction Characteristics of Piston Ring in a Reciprocating Engine

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

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

Experimental Studies on Friction and Scuffing Resistance of Ceramics for Cylinder Liner and Piston Ring

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

Language：English   Publishing type：Research paper (international conference proceedings)  

Evaluation of Friction and Scuffing Resistance of Ceramics for Cylinder Liner and Piston Ring

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

Studies on the Characteristics of Piston Ring Friction

Event date： 2015.10

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：富山市   Country：Japan  

Language：English  

Country：Korea, Republic of  

Tatsumi Kitahara, Diagnosis of Abnormal Lubrication Conditions to Prevent Seizure of Crosshead Bearings, The 30th CIMAC World Congress on Combustion Engines Technology for Ship Propulsion, Power Generation, Rail Traction

Presentation type：Oral presentation (general)  

Country：United Kingdom  

Studies on the Friction Characteristics of Piston Ring in a Diesel Engine

Presentation type：Oral presentation (general)  

Country：Canada  

Studies on Friction Characteristics of Reciprocating Engines

Presentation type：Oral presentation (general)  

Country：Denmark  

Load Carrying Capacity of an Externally Pressurized Crosshead-Pin Bearing for Large Size Two-Stroke Diesel Engines

Presentation type：Oral presentation (general)  

Country：Japan  

Piston Assembly Friction and Wear: The influence of Lubricant Viscometry

Presentation type：Oral presentation (general)  

Country：Japan  

Tatsumi Kitahara, Hidetsugu Yamamoto, Influence of Used Oil on Piston Ring Friction, International Tribology Conference, ITC2000

Presentation type：Oral presentation (general)  

Country：Germany  

Tatsumi Kitahara, Masaru Otsubo, Atsushi Okado, Motohira Yamada, Development of Lead-Free Tin-Copper Overlay Plated Aluminum-Tin Alloy for Crosshead-Pin Bearings, 23rd CIMAC World Congress on Combustion Engine Technology

Presentation type：Oral presentation (general)  

Country：Japan  

Tatsumi Kitahara, Daisuke Nakahara, Niels Nojgaard, Improved Load Carrying Capacity of Crosshead Bearings by Incorporating Taper Geometry in Oil-Grooves, 24th CIMAC World Congress on combustion Engine Technology

Presentation type：Oral presentation (general)  

Country：Japan  

Tatsumi Kitahara, Daisuke Nakahara, Detection of Abnormal Vibration to Prevent Seizure of Crosshead Bearings in Large Two-Stroke Diesel Engines, 7th International Symposium on Marine Engineering, ISME 2005

Country：United States  

Tatsumi Kitahara, Toshiaki Konomi, Makoto Murata, Norbert Berg, Peter Wilde, Influences of GDL Design Parameters on PEFC Performance, 2006 Fuel Cell Seminar

Presentation type：Oral presentation (general)  

Country：Austria  

Tatsumi Kitahara, Daisuke Nakahara, Accurate Measurement of Oil Film Thickness Using LIF Method to Improved Load Carrying Capacity of Crosshead Bearings, 25th CIMAC World Congress on Combustion Engine Technology

Country：United States  

Makoto Murata, Tatsumi Kitahara, Toshiaki Konomi, Hironori Nakajima, Nico Haak, Peter Wilde, New Approach to Understanding Dominant Factors for GDL Water Management Capability, 2007 Fuel Cell Seminar

Country：United States  

Tatsumi Kitahara, Toshiaki Konomi, Hironori Nakajima, Yoshinobu Tateishi, Nico Haak, Peter Wilde, Best Combination of Gas Diffusion Layers for Polymer Electrolyte Fuel Cell under Cathode Condition of Very Low Humidity, ECS Meeting, PRiME2008

Country：Austria  

Tatsumi Kitahara, Toshiaki Konomi, Hironori Nakajima, Influence of Gas Diffusion Layers with Microporous Layer on the Performance of Polymer Electrolyte Fuel Cells, 216th ECS Meeting

Country：United States  

Tatsumi Kitahara, Hironori Nakajima, Toshiaki Konomi, Influence of Hydrophilic and Hydrophobic Double MPL Coated GDL on PEFC Performance without Cathode Humidification, 218th ECS Meeting

Country：United States  

Tatsumi Kitahara, Hironori Nakajima, Kyohei MOri, Hydrophilic and Hydrophobic Double MPL Coated GDL to Enhance PEFC Performance under Low and High Humidity Conditions, 220th ECS Meeting

Country：United States  

Tatsumi Kitahara, Hironori Nakajima, Kyohei MOri, Masaoki Inamoto, Influence of Hydrophilic and Hydrophobic Double MPL Coated GDL on PEFC Performance, PRiME2012

Country：United States  

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

Country：Mexico  

Tatsumi Kitahara, Hironori Nakajima, Kosuke Okamura, Influence of GDL Coated with MPL Containing CNTs on PEFC Performance under Low and High Humidity Conditions, 226th ECS Meeting

Country：United States  

Tatsumi Kitahara, Hironori Nakajima, Kosuke Okamura, Influence of Hydrophilic and Hydrophobic Triple MPL Coated GDL on the Oxygen Transport Resistance in a PEFC under High Humidity Conditionse, 228th ECS Meeting

Language：English  

Country：United States  

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 ECS Meeting

Language：English  

Country：Japan  

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

Language：English  

Country：Canada  

Tatsumi Kitahara, Hironori Nakajima, Diagnosis of Abnormal Operational Conditions and Performance Enhancement of Marine Fuel Cells, The 29th CIMAC World Congress on Combustion Engines Technology for Ship Propulsion, Power Generation, Rail Traction

Event date： 2023.10

Language：English   Presentation type：Oral presentation (general)  

Country：Sweden  

Peng Wang, Hironori Nakajima, Tatsumi Kitahara, Effect of Hydrophilic and Hydrophobic Composite Microporous Layer Coated Gas Diffusion layers on PEFC Performance, 244th ECS Meeting

Event date： 2023.10

Language：English   Presentation type：Oral presentation (general)  

Country：Sweden  

Makoto Yoshikawa, Kotaro Yamamoto, Zhiyun Noda, Masahiro Yasutake, Tatsumi Kitahara, Yuya Tachikawa, Stephen Lyth, Akari Hayashi, Junko Matsuda, Kazunari Sasaki, Self-Supporting Microporous Layer for Polymer Electrolyte Fuel Cells, 244th ECS Meeting

Event date： 2023.9

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：神戸市   Country：Japan  

Event date： 2023.8 - 2023.9

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Mitsuhiro Soejima, Toshiro Hamatake, Tatsumi Kitahara, Edward Smith, Ian Sherrington, Analytical Study on Involvement of Temperature in Friction and Scuffing for Engine Tribo-Components, 2023 JASE/SAE International Meeting for Powertrain, Energy & Lubricants

Event date： 2017.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京都   Country：Japan  

Event date： 2017.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京都   Country：Japan  

Event date： 2016.11 - 2016.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：千葉市   Country：Japan  

Event date： 2016.10

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：姫路市   Country：Japan  

Event date： 2016.10

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：姫路市   Country：Japan  

Event date： 2016.6

Language：English   Presentation type：Oral presentation (general)  

Country：Finland  

Masaaki Endo, Motohiko Koushima, Takeshi Katagiri, Tatsumi Kitahara, Theoretical and experimental oil film characteristics of an externally-pressurized crosshead bearing to enhance the load charri, 28th CIMAC World Congress on Combustion Engine Technology

Event date： 2015.11

Presentation type：Oral presentation (general)  

Venue：名古屋市   Country：Japan  

Event date： 2015.11

Presentation type：Oral presentation (general)  

Venue：名古屋市   Country：Japan  

Event date： 2015.11

Presentation type：Oral presentation (general)  

Venue：名古屋市   Country：Japan  

Event date： 2015.10

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：富山市   Country：Japan  

Event date： 2014.11

Presentation type：Oral presentation (general)  

Venue：京都市   Country：Japan  

Event date： 2014.11

Presentation type：Oral presentation (general)  

Venue：京都市   Country：Japan  

Event date： 2014.11

Presentation type：Oral presentation (general)  

Venue：東京都   Country：Japan  

Event date： 2014.11

Presentation type：Oral presentation (general)  

Venue：東京都   Country：Japan  

Language：English  

Country：Korea, Republic of  

Mitsuhiro Soejima, Toshiro Hamatake, Tatsumi Kitahara, Edward Smith, Edward Sherrington, Yutaro Wakuri, Analytical Study on Involvement of Temperature in Friction and Scuffing of Sliding Surface in an Engine, The 30th CIMAC World Congress on Combustion Engines Technology for Ship Propulsion, Power Generation, Rail Traction

Presentation type：Oral presentation (general)  

Mixed Lubrication of a Crosshead-Pin Bearing in a Large Marine Diesel Engine

Presentation type：Oral presentation (general)  

Effects of Lubricant Viscosity on the Mixed Lubrication of a Piston Ring Pack in an Internal Combustion Engine

Presentation type：Oral presentation (general)  

Country：Germany  

Some Studies on the Tribology of Diesel Engines

Presentation type：Oral presentation (general)  

Venue：福井大学（福井市）  

Presentation type：Oral presentation (general)  

Venue：東京大学（東京都）  

Venue：松山市  

Presentation type：Oral presentation (general)  

Venue：徳島大学（徳島市）  

Presentation type：Oral presentation (general)  

Venue：神戸大学（神戸市）  

Presentation type：Oral presentation (general)  

Country：Germany  

Characteristics of Trouble-Making Bunker Fuel Oil

Presentation type：Oral presentation (general)  

Country：Japan  

How to Detect Trouble-making Bunker Fuel Oil

Presentation type：Oral presentation (general)  

Country：Japan  

Studies on Tribology between Cylinder Liner and Piston Ring in Marine Diesel Engine

Presentation type：Oral presentation (general)  

Venue：東京   Country：Japan  

Presentation type：Oral presentation (general)  

Country：United Kingdom  

Studies on Microtopography of Oil-Film for Piston Rings

Presentation type：Oral presentation (general)  

Venue：熊本市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：吹田市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：吹田市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：福岡市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：福岡市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：福岡市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：東京都   Country：Japan  

Presentation type：Oral presentation (general)  

Country：Spain  

An Analytical Study on the Mixed Lubrication of a Piston Ring Pack in a Reciprocating Engine

Presentation type：Oral presentation (general)  

Country：Spain  

Study on Reduction of Frictional Power Loss for Diesel Engine

Presentation type：Oral presentation (general)  

Venue：福岡県言飯塚市   Country：Japan  

Country：United States  

Estimation of Water Layer Thickness Adjacent to the Cathode Catalyst Layer of a PEFC

Presentation type：Oral presentation (general)  

Venue：堺市   Country：Japan  

Presentation type：Oral presentation (general)  

Country：Japan  

Separate Analysis of the Anode and Cathode Overpotentials in a Solid Oxide Fuel Cell

Presentation type：Oral presentation (general)  

Venue：堺市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：堺市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：堺市   Country：Japan  

Country：Austria  

Thermal Analysis of a Microtubular Solid Oxide Fuel Cell Using Electrochemical Impedance Spectroscopy

Country：Korea, Republic of  

Thermal Degradation and Scuffing Resistance of Marine Cylinder Oil under High Temperature

Presentation type：Oral presentation (general)  

Venue：京都市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：京都市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：京都市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：京都市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：京都市   Country：Japan  

Country：United Kingdom  

Evaluation of Tribological Properties of Bearing Materials for Marine Diesel Engines Utilizing Acoustic Emission Technique

Country：United States  

Hironori Nakajima, Tatsumi Kitahara, Toshiaki Konomi, Effect of Flow Field Pattern and Microporous Layer on Gas Purge of a Polymer Electrolyte Fuel Cell, 218th ECS Meeting

Country：United States  

Yasutaka Takazono, Kazuto Tsuda, Tatsumi Kitahara, Hironori Nakajima, Toshiaki Konomi, Development of a PEFC with Serpentine-Interdigitated Hybrid Pattern Gas Channels, 218th ECS Meeting

Presentation type：Oral presentation (general)  

Venue：名古屋市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：名古屋市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：名古屋市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：名古屋市   Country：Japan  

Country：Canada  

Hironori Nakajima, Tatsumi Kitahara, Current Distribution Analysis of a Microtubular Solid Oxide Fuel Cell with Surface Temperature Measurements, 219th ECS Meeting

Country：Canada  

Yasutaka Takazono, Hironori Nakajima, Tatsumi Kitahara, Effect of Gas Flow Channel without Cathode Humidification Analized with Electrochemical Impedance Spectroscopy, 4th World Hydrogen Technology Convention

Presentation type：Oral presentation (general)  

Venue：東京都   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：東京都   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：東京都   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：東京都   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：東京都   Country：Japan  

Presentation type：Oral presentation (general)  

Country：United States  

Akira Fukushima, Hironori Nakajima, Tatsumi Kitahara, Performance Evaluation of an Anode-supported Honeycomb Solid Oxide Fuel Cell, PRiME2012

Country：United States  

Hironori Nakajima, Tatsumi Kitahara, Yasutaka Takazono, Satoshi Miyahara, Akira Shimizu, In-plane Water distribution at the Interface Between the Gas Diffusion Layer and Catalyst Layer in the Cathode of a Polymer Electrolyte Fuel Cell with a Hybrid Pattern Flow Field, PRiME2012

Presentation type：Oral presentation (general)  

Venue：福岡市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：福岡市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：福岡市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：福岡市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：大阪市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：大阪市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：大阪市   Country：Japan  

Presentation type：Oral presentation (general)  

Venue：大阪市   Country：Japan  

Country：Japan  

Shota Kotake, Hironori Nakajima, Tatsumi Kitahara, Flow Channel Configurations of an Anode-Supported Honeycomb Solid Oxide Fuel Cell

Country：Japan  

Akira Shimizu, Hironori Nakajima, Tatsumi Kitahara, Current Distribution Measurement of a Microtubular Solid Oxide Fuel Cell, 13th International Symposium on Solid Oxide Fuel Cells

Country：United States  

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

Language：English  

Country：Korea, Republic of  

Country：Mexico  

Shota Kotake, Hironori Nakajima, Tatsumi Kitahara, Mass Transfer in an Anode-Supported Honeycomb Solid Oxide Fuel Cell, 226th ECS Meeting

Country：Mexico  

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 ECS Meeting

Language：English  

Country：United States  

Tatsuhiro Ochiai, Hironori Nakajima, Takahiro Karimata, Tatsumi Kitahara, Kohei Ito, In-situ Analysis of the In-plane Current Distribution Difference Between Electrolyte-Supported Planar Solid Oxide Fuel Cells by Segmental Electrodes, 15th Intenaional Symposium on Solid Oxide Fuel Cells (SOFC-VX)

Language：English  

Country：United States  

Özgur Aydin, Hironori Nakajima, Tatsumi Kitahara, Kohei Ito, In Situ Measured Spatial Temperature Variations for Improving Reliability of Numerical SOFC Tools, 15th Intenaional Symposium on Solid Oxide Fuel Cells (SOFC-VX)

Language：English  

Country：United States  

Hironori Nakajima, Tatsumi Kitahara, Eisaku Tsuda, Segmented Electrode Analysys of an Anode-Supported Planar Solid Oxide Fuel Cell for Diagnosis
of Marine Power Applications, 15th Intenaional Symposium on Solid Oxide Fuel Cells (SOFC-VX)

Language：English  

Country：United States  

Shintaro Iwasaki, Hironori Nakajima, Tatsumi Kitahara, Pore Network Modeling of Microporous Layers for Polymer Electrolyte Fuel Cells, 237th ECS Meeting

Language：English  

Country：United States  

Hironori Nakajima, Shintaro Iwasaki, Tatsumi Kitahara, Mass Transfer in Microporous Layers for Polymer Electrolyte Fuel Cells Analyzed with Pore Network Modeling, 237th ECS Meeting

Language：English  

Country：United States  

Peng Wang, Tatsumi Kitahara, Hironori Nakajima, Hydrophilic and Hydrophobic Microporous Layer Coated Gas Diffusion Layer for Enhancing
PEFC Performance, 237th ECS Meeting

Language：English  

Country：United States  

Peng Wang, Hironori Nakajima, Tatsumi Kitahara, Effect of Hydrophilic Layer in Double Microporous Layer Coated Gas Diffusion Layer on PEFC Performance, 242nd ECS Meeting

Language：Japanese  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese  

Language：Japanese  

Language：Japanese  

Language：Japanese  

Language：Japanese  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese  

Language：Japanese  

Language：Japanese  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese  

Language：English  

Tatsumi Kitahara, Hydrogen Combustion Engine and Fuel Cell, World NAOE Forum 2015

Language：Japanese  

Language：Japanese  

Language：Japanese  

Language：Japanese  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

大形２サイクルディーゼル機関のクロスヘッド軸受は，軸受面に形成される油膜が薄く焼損や破損を起こしやすい滑り軸受であり，負荷能力を向上させることが重要な課題である。本研究ではクロスヘッド軸受の油膜厚さを精度良く測定する手法を開発し，負荷能力を向上させるための軸受すき間比，油溝形状，静圧軸受機構の適用などに関する適正な設計指針を明らかにした．さらに摺動面に苛酷な固体接触が発生した初期段階で潤滑状態の異常を検知し，損傷発生を防止するための異常診断法を開発した。

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

大形２サイクルディーゼル機関のクロスヘッド軸受は，軸受面に形成される油膜が薄く焼損や破損を起こしやすい滑り軸受であり，負荷能力を向上させて損傷発生の防止策を検討することが重要な課題である。本研究ではクロスヘッド軸受の油膜厚さを精度良く測定する手法を確立し，負荷能力を向上させるための軸受すき間比，テーパ付き油溝形状，静圧軸受機構の適用などに関する適正な設計指針を明らかにするとともに，摺動面に苛酷な固体接触が発生した初期段階で潤滑状態の異常を検出し，損傷発生を防止する診断法について開発したものである。

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (scientific journal)  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

Type：Scientific advice/Review 

Type：Scientific advice/Review 

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：42

Number of peer-reviewed articles in Japanese journals：7

Proceedings of International Conference Number of peer-reviewed papers：0

Proceedings of domestic conference Number of peer-reviewed papers：0

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Scientific advice/Review 

Type：Scientific advice/Review 

Type：Scientific advice/Review 

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：45

Number of peer-reviewed articles in Japanese journals：2

Proceedings of International Conference Number of peer-reviewed papers：0

Proceedings of domestic conference Number of peer-reviewed papers：0

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：25

Number of peer-reviewed articles in Japanese journals：2

Proceedings of International Conference Number of peer-reviewed papers：11

Proceedings of domestic conference Number of peer-reviewed papers：0

Type：Scientific advice/Review 

Type：Competition, symposium, etc. 

Type：Scientific advice/Review 

Type：Scientific advice/Review 

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：40

Number of peer-reviewed articles in Japanese journals：6

Proceedings of International Conference Number of peer-reviewed papers：0

Proceedings of domestic conference Number of peer-reviewed papers：0

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Academic society, research group, etc. 

Type：Academic society, research group, etc. 

Type：Scientific advice/Review 

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：38

Number of peer-reviewed articles in Japanese journals：3

Proceedings of International Conference Number of peer-reviewed papers：0

Proceedings of domestic conference Number of peer-reviewed papers：0

Type：Scientific advice/Review 

Type：Scientific advice/Review 

Type：Competition, symposium, etc. 

Type：Scientific advice/Review 

Type：Scientific advice/Review 

Type：Scientific advice/Review 

Type：Competition, symposium, etc. 

Type：Academic society, research group, etc. 

Type：Scientific advice/Review 

Type：Academic society, research group, etc. 

Type：Academic society, research group, etc. 

Type：Academic society, research group, etc. 

Type：Academic society, research group, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Number of participants：30

Type：Competition, symposium, etc. 

Type：Scientific advice/Review 

Type：Academic society, research group, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Number of participants：400

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Number of participants：800

Type：Competition, symposium, etc. 

Number of participants：39

Type：Competition, symposium, etc. 

Number of participants：30

Type：Competition, symposium, etc.