Cobalt Alloying Effect on Improvement of Ni/YSZ Anode-Supported Solid Oxide Fuel Cell Operating with Dry Methane

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  • Wongsawatgul Nicharee
    Department of Materials Science and Technology, Nagaoka University of Technology
  • Chaianansutcharit Soamwadee
    Department of Chemistry, Faculty of Science, Chulalongkorn University
  • Yamamoto Kazuhiro
    Department of Materials Science and Technology, Nagaoka University of Technology
  • Nanko Makoto
    Department of Mechanical Engineering, Nagaoka University of Technology
  • Sato Kazunori
    Department of Materials Science and Technology, Nagaoka University of Technology Advanced Methane-Utilization Research Center, Nagaoka University of Technology

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<p>Although the cermet consisting of nickel and zirconia is useful as the solid oxide fuel cell anode, the conventional cermet consisting of nickel and yttria-stabilized zirconia (Ni/YSZ) is prone to be deactivated for a direct supply of hydrocarbon fuels. This paper describes a method to retard the deactivation of the Ni/YSZ-based cermet anode by being modified with appropriate incorporation of Co as the alloying element into Ni. The single-type anode-supported solid oxide fuel cell (SOFC) consisting of the Ni0.75Co0.25/YSZ cermet anode, YSZ film electrolyte, and La0.8Sr0.2MnO3 cathode exhibited a prolonged stable SOFC performance at 750°C for dry methane (CH4) feeding compared to the one using the Ni/YSZ anode. The microstructural modification of the cermet anode caused a carbon tolerance effect against CH4 accompanied by a low anodic polarization resistance.</p>

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  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 62 (10), 1541-1548, 2021-10-01

    公益社団法人 日本金属学会

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