文摘
NiCu-Zr0.1Ce0.9O2?¦Ä based cermets are evaluated as anode materials for intermediate temperature solid oxide fuel cells (IT-SOFCs) using hydrocarbon fuels. Polarization curves and stability tests are conducted for direct methane SOFCs with various anode materials at 700?¡ãC. The performances and thermal stabilities of the cells with Zr0.1Ce0.9O2?¦Ä based anodes are significantly higher than those using pure CeO2-based anodes, indicating by doping 10?mol % Zr into CeO2, the thermal stability and anode performance can be improved. Among the anode materials investigated, the best performing anode is Ni-Zr0.1Ce0.9O2?¦Ä. The cell using the Ni0.5Cu0.5-Zr0.1Ce0.9O2?¦Ä anode exhibits a similar performance to that with the Ni-Zr0.1Ce0.9O2?¦Ä anode, but experiences a much lower degradation after a short-term operation in weakly humidified CH4. The cell using the Cu-Zr0.1Ce0.9O2?¦Ä anode shows the best stability, only 0.61 % degradation after a 48?h operation, but a low performance as well. The results suggest that NiCu-Zr0.1Ce0.9O2?¦Ä based cermets could be promising candidate anodes for direct hydrocarbon IT-SOFCs.