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题名: Investigation of SM0.5Sr0.5CoO3-delta/Co3O4 composite cathode for intermediate-temperature solid oxide fuel cells
作者: Zhang, Haizhou1;  Liu, Huanying1;  Cong, You1;  Yang, Weishen1
关键词: IT-SOFC ;  Co3O4 ;  SSC ;  Composite cathode ;  Polarization resistance
刊名: JOURNAL OF POWER SOURCES
发表日期: 2008-10-15
DOI: 10.1016/j.jpowsour.2008.06.038
卷: 185, 期:1, 页:129-135
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: The electrochemical properties of an Sm0.5Sr0.5CoO3-delta/Co3O (SSC/Co3O4) composite cathode were investigated as a function of the cathode-firing temperature, SSC/Co3O4 composition, oxygen partial pressure and CO2 treatment. The results showed that the composite cathodes had an optimal microstructure at a firing temperature of about 1100 degrees C, while the optimum Co3O4 content in the composite cathode was about40 wt.%. A single cell with this optimized C-40-1100 cathode exhibited a very low polarization resistance of 0.058 Omega cm(2), and yielded a maximum power density of 1092 mW cm(-2) with humidified hydrogen fuel and air oxidant at 600 degrees C. The maximum power density reached 1452 mW cm(-2) when pure oxygen was used as the oxidant for a cell with a C-30-1100 Cathode operating at 600 degrees C due to the enhanced open-circuit voltage and accelerated oxygen surface-exchange rate. X-ray diffraction and thermogravimetric analyses, as well as the electrochemical properties of a CO2-treated cathode, also implied promising applications of Such highly efficient SSC/Co3O4 composite cathodes in single-chamber fuel cells with direct hydrocarbon fuels operating at temperatures below 500 degrees C. (c) 2008 Elsevier B.V. All rights reserved.
关键词[WOS]: OXYGEN REDUCTION ;  HIGH-PERFORMANCE ;  IT-SOFC ;  ELECTROLYTE ;  STABILITY ;  KINETICS ;  ANODE ;  CO2
语种: 英语
WOS记录号: WOS:000259906600018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141003
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, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Zhang, Haizhou,Liu, Huanying,Cong, You,et al. Investigation of SM0.5Sr0.5CoO3-delta/Co3O4 composite cathode for intermediate-temperature solid oxide fuel cells[J]. JOURNAL OF POWER SOURCES,2008,185(1):129-135.
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