High performance Ni–Sm₂O₃ cermet anodes for intermediate-temperature solid oxide fuel cells

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• 作者：Dong Ding ; Lei Li ; Kai Feng ; Zhangbo Liu ; Changrong Xia
• 关键词：Ni– ; Sm₂O₃ anode ; Doped ceria ; Electrocatalytic activity ; Samaria ; Solid oxide fuel cells
• 刊名：Journal of Power Sources
• 出版年：2009
• 出版时间：15 February 2009
• 年：2009
• 卷：187
• 期：2
• 页码：400-402
• 全文大小：710 K

文摘

A novel anode consisting of Ni and Sm₂O₃ with negligible oxygen-ion conductivity was developed for intermediate-temperature solid oxide fuel cells (SOFCs). Its triple phase boundary length is pretty small compared with the conventional Ni-samaria doped ceria (SDC) anode, of which SDC is one of the electrolytes having high oxygen-ion conductivity. Even so, single cells with Ni–Sm₂O₃ anodes generated peak power density of 542 mW cm⁻² at 600 °C, comparable to, if not higher than those with the Ni–SDC anodes when the same cathodes and electrolytes were applied. In addition, Ni–Sm₂O₃ exhibited lower interfacial polarization resistance than Ni–SDC. The high electrochemical performance, which might be related to the high catalytic activity of Sm₂O₃ and the unique microstructures of the Ni–Sm₂O₃, suggests a viable alternative to the conventional anodes for SOFCs.