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Research paper : Durable polymer electrolyte fuel cells (PEFC) for residential co-generation application (K. Tanimoto et al.)−63−Synthesiology - English edition Vol.5 No.1 (2012) Ubiquitous Energy Devices, and leader of the Fuel Cell Durability Research Group in 2004. Currently, leader of the Ionics Research Group. Achieved the 40,000-hour continuous generation using the MCFC (Molten Carbonate Fuel Cell) in 1995, and engaged in the material research for MCFC to improve durability. From 2004 to 2007, was in charge of organizing the Project for Fundamental Research of Degradation of PEFC Stacks presented in this paper.Kazuaki YasudaJoined the Osaka National Research Institute, Agency of Industrial Science and Technology in 1994. Advanced Fuel Cell Research Group, Special Division for Green Life Technology, AIST in 2001. Leader of the Advanced Fuel Cell Research Group, Research Institute for Ubiquitous Energy Devices in 2004. Currently, Director of the Research Planning Office of Environment and Energy. Since joining AIST, has engaged in basic research on the polymer membrane of fuel cells. Prior to the Project for Fundamental Research of Degradation of PEFC Stacks presented in this paper, engaged in the basic research for degradation in the industry-academia-government collaborative project for clarifying the PEFC degradation factors from 2001, and proposed the topics in practical use based on this experience.Zyun SiromaCompleted the master’s program at the Graduate School of Engineering, Kyoto University in 1996. Joined the Osaka National Research Institute, Agency of Industrial Science and Technology in 1996. Engaged in research for the assessment of material and cell using electrochemical methods to clarify the degradation factors and to improve the performance of PEFC. Received doctorate in 2008 (Engineering, Kyoto University). Currently, Senior Researcher of the Advanced Fuel Cell Research Group, Research Institute for Ubiquitous Energy Devices, AIST. In this paper, was in charge of the clarification of the degradation mechanism using the model cell.Tomoki AkitaCompleted the doctoral program at the Department of Applied Physics, Graduate School of Engineering, Osaka University in 1998 (Doctor, Engineering). Special Researcher at the Osaka National Research Institute in 1998; joined the Osaka National Research Institute in 1999. Nano Interface Function Research Group, Special Division for Green Life Technology, AIST in 2001. Senior Researcher of the Nano Material Science Research Group, Research Institute for Ubiquitous Energy Devices, AIST in 2004. Engages in the structural analysis of functional materials using the analytic electron microscope. In this paper, was in charge of analyzing the degradation of the fuel cell material using EM.References[1]NEDO Report “Heisei 17 Nendo ~ Heisei 19 Nendo Seika Hokokusho Kotaikobunshigata Nenryodenchi Jitsuyokasenryakuteki-gijutsukaihatsu; Kisoteki Kyotsuteki Kadai Ni Kansuru Gijutsukaihatu; Kotaikobunshigata-Nenryodenchi Sutakku No Rekka Kaiseki Kiban Kenkyu ‘Sutakku Rekka Mekanizumu Kaimei Ni Kanshite No Kisoteki-shien Kenkyu’” (Fiscal Year 2005~2007 Final Report: Strategic Development of PEFC Techonologies for Practical Application; Development of Technologies on Basic and Common Issues; Fundamental Research of Degradation of Polymer Electrolyte Fuel Cell Stacks [Basic Support Research on the Clarification of Stack Degradation Mechanism]) No. 100012431. Can be downloaded from NEDO homepage (in Japanese).[2]A. Taniguchi, T. Akita, K. Yasuda and Y. Miyazaki: Analysis of electrocatalyst degradation in PEMFC caused by cell reversal during fuel starvation, J. Power Sources 130, 42-49 (2004).[3]K. Yasuda, A. Taniguchi, T. Akita, T. Ioroi and Z. Siroma: Platinum dissolution and deposition in the polymer electrolyte membrane of a PEM fuel cell as studied by potential cycling, Phys. Chem. Chem. Phys., 8, 746-752 (2006).[4]T. Akita, A. Taniguchi, J. Maekawa, Z. Siroma, K. Tanaka, M. Kohyama and K. Yasuda: Analytical TEM study of Pt particle deposition in the proton-exchange membrane of a membrane- electrode-assembly, J. Power Sources 159, 461-467 (2006).[5]C. A. Reiser, L. Bregoli, T. W. Patterson, J. S. Yi, J. D. Yang, M. L. Perry and T. D. Jarvi: A reverse-current decay mechanism for fuel cells, Electrochem. Solid-State Lett., 8, A273-A276 (2005).[6]Z. Siroma, N. Fujiwara, T. Ioroi, S. Yamazaki, H. Senoh, K. Yasuda and K. Tanimoto: Transient phenomena in a PEMFC during the start-up of gas feeding observed with a 97-fold segmented cell, J. Power Sources, 172, 155 -162 (2007).[7] Z. Siroma, M. Tanaka, K. Yasuda, K. Taninoto, M. Inaba and A. Tasaka: Electrochemical corrosion of carbon materials in an aqueous acid solution, Electrochemistry, 75, 258-260 (2007).[8]Z. Siroma, K. Ishii, K. Yasuda, Y. Miyazaki, M. Inaba and A. Tasaka: Imaging of highly oriented pyrolytic graphite corrosion accelerated by Pt particles, Electrochem. Commun., 7, 1153-1156 (2005).[9]Z. Siroma, K. Ishii, K. Yasuda, M. Inaba and A. Tasaka: Stability of platinum particles on a carbon substrate investigated by atomic force microscopy and scanning electron microscopy, J. Power Sources, 171, 524-529 (2007).AuthorsKazumi TanimotoJoined the Osaka National Research Institute, Agency of Industrial Science and Technology in 1984. Head of the Collaborative Research Team for Molten Carbonate Fuel Cell, AIST Kansai Collaboration Center, Collaboration Promotion Department in 2001. Deputy Director of the Research Institute for

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