NiCu-Zr_0.1Ce_0.9O_2?¦Ä anode materials for intermediate temperature solid oxide fuel cells using hydrocarbon fuels

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• 作者：Shidong Song ; Minfang Han ; ^{hanminfang@sina.com} ; Jianqiang Zhang ; Hui Fan
• 关键词：Solid oxide fuel cell ; Anode ; Ceria&ndash ; zirconia ; Intermediate temperature ; Direct utilization of hydrocarbons
• 刊名：Journal of Power Sources
• 出版年：2013
• 出版时间：1 July, 2013
• 年：2013
• 卷：233
• 期：Complete
• 页码：62-68
• 全文大小：1014 K

文摘

NiCu-Zr_0.1Ce_0.9O_2?¦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 Zr_0.1Ce_0.9O_2?¦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-Zr_0.1Ce_0.9O_2?¦Ä. The cell using the Ni_0.5Cu_0.5-Zr_0.1Ce_0.9O_2?¦Ä anode exhibits a similar performance to that with the Ni-Zr_0.1Ce_0.9O_2?¦Ä anode, but experiences a much lower degradation after a short-term operation in weakly humidified CH₄. The cell using the Cu-Zr_0.1Ce_0.9O_2?¦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-Zr_0.1Ce_0.9O_2?¦Ä based cermets could be promising candidate anodes for direct hydrocarbon IT-SOFCs.