Achievements of NEDO Durability Projects on SOFC Stacks in the Light of Physicochemical Mechanisms

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  • H. Yokokawa
    The University of Tokyo Institute of Industrial Science 4‐6‐1 Komaba, Meguro‐ku 153‐8505 Tokyo Japan
  • M. Suzuki
    Osaka Gas. Co. Ltd. 6‐19‐9 Torishima, Konohaha‐ku 554‐0051 Osaka Japan
  • M. Yoda
    Osaka Gas. Co. Ltd. 6‐19‐9 Torishima, Konohaha‐ku 554‐0051 Osaka Japan
  • T. Suto
    Mitsubishi Hitachi Power Systems, Ltd. Fuel Cell Business Department 1‐1 Akunoura‐machi, Nagasaki 850‐8610 Nagasaki Japan
  • K. Tomida
    Mitsubishi Hitachi Power Systems, Ltd. Fuel Cell Business Department 1‐1 Akunoura‐machi, Nagasaki 850‐8610 Nagasaki Japan
  • K. Hiwatashi
    Mitsubishi Hitachi Power Systems, Ltd. Fuel Cell Business Department 1‐1 Akunoura‐machi, Nagasaki 850‐8610 Nagasaki Japan
  • M. Shimazu
    TOTO Ltd. 2‐8‐1Honson, Chigasaki 253‐8577 Kanagawa Japan
  • A. Kawakami
    TOTO Ltd. 2‐8‐1Honson, Chigasaki 253‐8577 Kanagawa Japan
  • H. Sumi
    NGK SPARK PLUG 2808 Oaza‐Iwasaki, Komaki 485‐8510 Aichi Japan
  • M. Ohmori
    NGK INSULATORS, Ltd. 2‐56 Suda‐cho, Mizuho, Nagoya 467‐8530 Aichi Japan
  • T. Ryu
    NGK INSULATORS, Ltd. 2‐56 Suda‐cho, Mizuho, Nagoya 467‐8530 Aichi Japan
  • N. Mori
    Murata Manufacturing Co., Ltd. 1‐10‐1, Higashikotari, Nagaokakyo‐shi 617‐8555 Kyoto Japan
  • M. Iha
    Murata Manufacturing Co., Ltd. 1‐10‐1, Higashikotari, Nagaokakyo‐shi 617‐8555 Kyoto Japan
  • S. Yatsuzuka
    DENSO CORPORATION 1‐1 Showa‐cho, Kariya 448‐8661 Aichi Japan
  • K. Yamaji
    The National Institute of Advanced Industrial Science and Technology (AIST) Department of Energy and Environment 305‐8565 Ibaraki Japan
  • H. Kishimoto
    The National Institute of Advanced Industrial Science and Technology (AIST) Department of Energy and Environment 305‐8565 Ibaraki Japan
  • K. Develos‐Bagarinao
    The National Institute of Advanced Industrial Science and Technology (AIST) Department of Energy and Environment 305‐8565 Ibaraki Japan
  • T. Shimonosono
    The National Institute of Advanced Industrial Science and Technology (AIST) Department of Energy and Environment 305‐8565 Ibaraki Japan
  • K. Sasaki
    Kyushu University Next‐Generation Fuel Cell Research Center (NEXT‐FC); International Research Center for Hydrogen Energy 744 Motooka Nishi‐ku 819‐0325 Fukuoka Japan
  • S. Taniguchi
    Kyushu University Next‐Generation Fuel Cell Research Center (NEXT‐FC); International Research Center for Hydrogen Energy 744 Motooka Nishi‐ku 819‐0325 Fukuoka Japan
  • T. Kawada
    Tohoku University Graduate School of Environmental Studies 980‐8579 Sendai Japan
  • M. Muramatsu
    Tohoku University Graduate School of Environmental Studies 980‐8579 Sendai Japan
  • K. Terada
    Tohoku University Graduate School of Environmental Studies 980‐8579 Sendai Japan
  • K. Eguchi
    Kyoto University Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering Nishikyo‐ku 615‐8510 Kyoto Japan
  • T. Matsui
    Kyoto University Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering Nishikyo‐ku 615‐8510 Kyoto Japan
  • H. Iwai
    Kyoto University Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering Nishikyo‐ku 615‐8510 Kyoto Japan
  • M. Kishimoto
    Kyoto University Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering Nishikyo‐ku 615‐8510 Kyoto Japan
  • N. Shikazono
    The University of Tokyo Institute of Industrial Science 4‐6‐1 Komaba, Meguro‐ku 153‐8505 Tokyo Japan
  • Y. Mugikura
    Central Research Institute of Electric Power Industry (CRIEPI) 2‐6‐1 Nagasaka, Yokosuka 240‐0196 Kanagawa Japan
  • T. Yamamoto
    Central Research Institute of Electric Power Industry (CRIEPI) 2‐6‐1 Nagasaka, Yokosuka 240‐0196 Kanagawa Japan
  • M. Yoshikawa
    Central Research Institute of Electric Power Industry (CRIEPI) 2‐6‐1 Nagasaka, Yokosuka 240‐0196 Kanagawa Japan
  • K. Yasumoto
    Central Research Institute of Electric Power Industry (CRIEPI) 2‐6‐1 Nagasaka, Yokosuka 240‐0196 Kanagawa Japan
  • K. Asano
    Central Research Institute of Electric Power Industry (CRIEPI) 2‐6‐1 Nagasaka, Yokosuka 240‐0196 Kanagawa Japan
  • Y. Matsuzaki
    Tokyo Gas Co., Ltd. Energy System Research Institute 3‐13‐1 Minami‐Senju, Arakawa‐ku 116‐0003 Tokyo Japan
  • K. Sato
    Tokyo Gas Co., Ltd. Energy System Research Institute 3‐13‐1 Minami‐Senju, Arakawa‐ku 116‐0003 Tokyo Japan
  • T. Somekawa
    Tokyo Gas Co., Ltd. Energy System Research Institute 3‐13‐1 Minami‐Senju, Arakawa‐ku 116‐0003 Tokyo Japan

Description

<jats:title>Abstract</jats:title><jats:p>Achievements of NEDO durability projects on SOFC mode are summarized with a focus on the physicochemical mechanisms characterized by diffusion properties of cell components and chemical reactions of cell components with gaseous impurities. Ni sintering and depletion including impurity (P, B, S) effects have been examined in terms of the surface/interface energies of Ni/oxide cermet anodes. The conductivity degradation due to the transformation of the cubic YSZ electrolyte was found to be characterized in terms of two time constants for the reductive and the oxidative regions to be determined by the Y‐diffusivity and its enhancement on NiO internal reduction in YSZ, while observed gaps in conductivity degradation behavior between stacks and button cells were ascribed to differences in those physicochemical properties involved, namely cation diffusion and kinetics associated with NiO internal reduction. The cathode performance degradation due to sulfur poisoning exhibits a variety of dependences on the microstructure (dense or porous) of doped‐ceria interlayers, the thickness of YSZ electrolyte and the humidity in the anode atmosphere, suggesting effects of protons in the cathode vicinity and the SrO activity changes during fabrication the LSCF/GDC/YSZ multilayers. Some defect chemical considerations were made on how such defects are affected by fabrication processes.</jats:p>

Journal

  • Fuel Cells

    Fuel Cells 19 (4), 311-339, 2019-06-03

    Wiley

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