Perovskite Sr1鈥?i>xCexCoO3鈭捨?/sub> (0.05 鈮?x 鈮?0.15) as Superior Cathodes for Intermediate Temperature Solid Oxide Fuel Cells

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• 作者：Wei Yang ; Tao Hong ; Shuai Li ; Zhaohui Ma ; Chunwen Sun ; Changrong Xia ; Liquan Chen
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：February 13, 2013
• 年：2013
• 卷：5
• 期：3
• 页码：1143-1148
• 全文大小：454K
• 年卷期：v.5,no.3(February 13, 2013)
• ISSN：1944-8252

文摘

Perovskite Sr_1鈥?i>xCe_xCoO3鈭捨?/sub> (0.05 鈮?x 鈮?0.15) have been prepared by a sol鈥揼el method and studied as cathodes for intermediate temperature solid oxide fuel cells. As SOFC cathodes, Sr_1鈥?i>xCe_xCoO3鈭捨?/sub> materials have sufficiently high electronic conductivities and excellent chemical compatibility with SDC electrolyte. The peak power density of cells with Sr_0.95Ce_0.05CoO3鈭捨?/sub> is 0.625 W cm^鈥? at 700 掳C. By forming a composite cathode with an oxygen ion conductor SDC, the peak power density of the cell with Sr_0.95Ce_0.05CoO3鈭捨?/sub>-30 wt %SDC composite cathode, reaches 1.01 W cm^鈥? at 700 掳C, better than that of Sm_0.5Sr_0.5CoO₃-based cathode. All these results demonstrates that Sr_1鈥?i>xCe_xCoO3鈭捨?/sub> (0.05 鈮?x 鈮?0.15)-based materials are promising cathodes for an IT-SOFC.

Keywords:

solid oxide fuel cell; oxygen-reduction reaction; Sr_1鈭?i>xCe_xCoO_{3鈭捨?/sub>; composite cathode; intermediate temperature}