2021•MATERIALS TRANSACTIONSOpen access
Cobalt Alloying Effect on Improvement of Ni/YSZ Anode-Supported Solid Oxide Fuel Cell Operating with Dry Methane
Nicharee Wongsawatgul, Soamwadee Chaianansutcharit, Kazuhiro Yamamoto, Makoto Nanko, Kazunori Sato
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Abstract
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 Ni 0.75 Co 0.25 /YSZ cermet anode, YSZ film electrolyte, and La 0.8 Sr 0.2 MnO 3 cathode exhibited a prolonged stable SOFC performance at 750°C for dry methane (CH 4 ) feeding compared to the one using the Ni/YSZ anode.The microstructural modification of the cermet anode caused a carbon tolerance effect against CH 4 accompanied by a low anodic polarization resistance.[
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