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题名: Investigation of Ba1-xSrxCo0.8Fe0.2O3-delta as cathodes for low-temperature solid oxide fuel cells both in the absence and presence of CO2
作者: Yan, Aiyu1, 2;  Yang, Min1, 2;  Hou, Zhifang1;  Dong, Yonglai1;  Cheng, Mojie1
关键词: Ba1-xSrxCo0.8Fe0.2O3-delta ;  Solid oxide fuel cell ;  Cathode ;  Carbon dioxide
刊名: JOURNAL OF POWER SOURCES
发表日期: 2008-10-15
DOI: 10.1016/j.jpowsour.2008.06.088
卷: 185, 期:1, 页:76-84
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Electrochemistry ;  Energy & Fuels
英文摘要: Ba1-xSrxCo0.8Fe0.2O3-delta (BSCF)(0 <= x <= 1) composite oxides were prepared and tested as cathodes for low-temperature solid oxide fuel cells (SOFCs) both in the absence and presence Of CO2. It is found that the BSCF cathodes in the whole range of strontium (loping levels show promising performance at 500-600 degrees C in the absence Of CO2, among which the SrCo0.8Fe0.2O3-delta (SCF) cathode gives the highest power density while BaCo0.8Fe0.2O3-delta (BCF) cathode shows the lowest performance. The impedance analysis reveals that both the ohmic resistance and polarization resistance of the fuel cell increases when the strontium content decreases. It is believed that the microstructure and electrical conductivity simultaneously affect the process of oxygen reduction. The presence of CO2 deteriorates the BSCF performance by adsorbing on the cathode surface and thus obstructing the oxygen surface exchange reaction. The CO2 exerts a more intense influence on BSCF with higher barium content. (c) 2008 Elsevier B.V. All rights reserved.
关键词[WOS]: IT-SOFC ;  PEROVSKITE OXIDES ;  BA0.5SR0.5CO0.8FE0.2O3-DELTA PEROVSKITE ;  IMPEDANCE SPECTROSCOPY ;  PERFORMANCE EVALUATION ;  ELECTRICAL-PROPERTIES ;  OXYGEN-TRANSPORT ;  ETHANOL ;  OPTIMIZATION ;  ELECTROLYTE
语种: 英语
WOS记录号: WOS:000259906600012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140950
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Yan, Aiyu,Yang, Min,Hou, Zhifang,et al. Investigation of Ba1-xSrxCo0.8Fe0.2O3-delta as cathodes for low-temperature solid oxide fuel cells both in the absence and presence of CO2[J]. JOURNAL OF POWER SOURCES,2008,185(1):76-84.
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