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

✍ Scribed by Dong Ding; Lei Li; Kai Feng; Zhangbo Liu; Changrong Xia

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 711 KB
• Volume: 187
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/j.jpowsour.2008.11.013

✦ Synopsis

A novel anode consisting of Ni and Sm 2 O 3 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-Sm 2 O 3 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-Sm 2 O 3 exhibited lower interfacial polarization resistance than Ni-SDC. The high electrochemical performance, which might be related to the high catalytic activity of Sm 2 O 3 and the unique microstructures of the Ni-Sm 2 O 3 , suggests a viable alternative to the conventional anodes for SOFCs.