Fabrication and performance of Ce_0.85Sm_0.15O_1.925–Fe₂O₃ electrolytes in IT-SOFCs

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• 作者：Dan Xu^a ; ^b ; Xiaomei Liu^a ; ^{xiaomeiliu58@sina.com"" rel=""nofollow} ; Shifeng Xu^b ; Duanting Yan^a ; Li Pei^a ; Chengjun Zhu^a ; Dejun Wang^a ; Wenhui Su^a
• 关键词：Solid oxide fuel cell ; Electrolyte ; SDC-Fe₂O₃ ; Electrochemical performance
• 刊名：Solid State Ionics
• 出版年：2011
• 出版时间：16 June 2011
• 年：2011
• 卷：192
• 期：1
• 页码：510-514
• 全文大小：838 K

文摘

The electrolyte materials Ce_0.85Sm_0.15O_1.925–x at. % FeO_1.5 (x = 0, 0.5, 1, 2, 3) were synthesized by means of glycine–nitrate process (GNP). Their structures and ionic conductivities were characterized by X-ray diffraction, SEM and AC impedance spectroscopy. All the electrolytes were found to be ceria-based solid solutions of fluorite type structures. Grain size increased with increased Fe₂O₃ content up to 0.5 at. % and then became almost constant with further addition of Fe₂O₃. The grain-boundary resistance could be significantly decreased by small addition of Fe₂O₃. Electrolyte-supported solid oxide fuel cells (SOFC) fabricated with Ce_0.85Sm_0.15O_1.925–x at. % FeO_1.5 (x = 0.5, 3) electrolytes were studied and compared with the fuel cell with Ce_0.85Sm_0.15O_1.925 as electrolyte.