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题名: Behavior of lanthanum-doped ceria and Sr-, Mg-doped LaGaO3 electrolytes in an anode-supported solid oxide fuel cell with a La0.6Sr0.4CoO3 cathode
作者: Bi, Zhonghe;  Dong, Yonglai;  Cheng, Mojie;  Yi, Baolian
关键词: anode-supported ;  electrolyte ;  IT-SOFCs ;  doped-CeO2 ;  doped-LaGaO3
刊名: JOURNAL OF POWER SOURCES
发表日期: 2006-10-20
DOI: 10.1016/j.jpowsour.2006.03.065
卷: 161, 期:1, 页:34-39
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: Anode-supported solid oxide fuel cells (SOFCs) with lanthanum-doped ceria (LDC)/Sr-, Mg-doped LaGaO3 (LSGM) bilayered or LDC/LSGM/LDC trilayered electrolyte films were fabricated with a pure La0.6Sr0.4CoO3 (LSC) cathode. The behaviors of the two electrolytes in cells were investigated by using scanning electron microscopy, impedance spectroscopy and cell performance measurements. The reactions between LSGM and anode material can be suppressed by applying a ca. 15 mu m LDC film. Due to the Co diffusion from the LSC cathode to the LSGM electrolyte during high temperature sintering, the electronic conductivity of the LDC electrolyte cannot be completely blocked with an LSGM layer below 50 mu m, which leads to open-circuit potentials of these cells of ca. 0.988 V at 800 degrees C. The electrical conductivities of LDC and LSGM electrolytes in the cells under operation conditions are obtained from the dependence of the cell ohmic resistance on the electrolyte thickness. The electrical conductivity of LDC electrolyte is ca. 0.117 S cm(-1) at 800 degrees C on the bilayered electrolyte cells with a 50 mu m LSGM layer. The bilayer electrolyte cells with a 25 mu m LDC layer at 800 degrees C, had a cell ohmic resistance two-stage linear dependence on the LSGM layer thickness, which showed the electrical conductivity of ca. 1.9 S cm(-1) for the LSGM layer below 50 mu m and 0.22 S cm(-1) for the LSGM layer above 100 mu m. With a LDC/LSGM/LDC trilayered electrolyte film for the anode-supported cell, an open-circuit potential of 1.043 V was achieved. (c) 2006 Elsevier B.V. All rights reserved.
关键词[WOS]: GALLATE ELECTROLYTE ;  PEROVSKITE OXIDE ;  POWER-DENSITY ;  CONDUCTIVITY ;  ION ;  CO ;  LA0.8SR0.2GA0.8MG0.2O3 ;  ZIRCONIA ;  SOFC
语种: 英语
WOS记录号: WOS:000241412000005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140356
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 166023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100864, Peoples R China

Recommended Citation:
Bi, Zhonghe,Dong, Yonglai,Cheng, Mojie,et al. Behavior of lanthanum-doped ceria and Sr-, Mg-doped LaGaO3 electrolytes in an anode-supported solid oxide fuel cell with a La0.6Sr0.4CoO3 cathode[J]. JOURNAL OF POWER SOURCES,2006,161(1):34-39.
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