Performance and durability of Ni–Co alloy cermet anodes for solid oxide fuel cells

Ni alloys are examined as redox-resistant alternatives to pure for solid oxide fuel cell (SOFC) anodes. Among the various candidate alloys, Ni–Co selected due their thermochemical stability in SOFC anode environment. alloy cermet anodes prepared by ammonia co-precipitation, and electrochemical performance microstructure evaluated. exhibit high durability against redox cycling, whilst current-voltage characteristics comparable those of Microstructural observation reveals that cobalt-rich layers on outer surface particles protect further oxidation within alloy. In long-term tests using highly humidified hydrogen gas, use a with Gd-doped CeO2 suppresses degradation power generation performance. It is concluded attractive development robust SOFCs.