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题名: Co/Fe oxide and Ce0.8Gd0.2O2-delta composite interlayer for solid oxide electrolysis cell
作者: Yan, Jingbo1, 2;  Shang, Lei1, 2;  Zhao, Zhe1;  Ou, Dingrong1;  Cheng, Mojie1
关键词: Solid oxide electrolysis cell ;  Ceria interlayer ;  Cobalt oxide ;  Sr segregation
刊名: JOURNAL OF ENERGY CHEMISTRY
发表日期: 2016-09-01
DOI: 10.1016/j.jechem.2016.05.002
卷: 25, 期:5, 页:840-844
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Energy & Fuels ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Energy & Fuels ;  Engineering
英文摘要: A composite interlayer comprised of gadolinia doped ceria (GDC) and Co/Fe oxide was prepared and investigated for solid oxide electrolysis cell with yttrium stabilized zirconia (YSZ) electrolyte and La0.6Sr0.4Co0.2Fe0.8O3-delta(LSCF) anode. The interlayer was constructed of a base layer of GDC and a top layer of discrete Co3O4/FeCo2O4 particles. The presence of the GDC layer drastically alleviated the undesired reactions between LSCF and YSZ, and the presence of Co/Fe oxide led to further performance improvement. At 800 degrees C and 45% humidity, the cell with 70% Co/Fe-GDC interlayer achieved 0.98 A/cm(2) at 1.18 V, 14% higher than the cell without Co/Fe oxide. Electrochemical impedance spectroscopy (EIS) revealed that with higher Co/Fe content, both the ohmic resistance and the polarization resistance of the cell were reduced. It is suggested that Co/Fe oxide can react with the Sr species segregated from LSCF and Sr1-x(Co,Fe)O3-delta, a compound with high catalytic activity and electronic conductivity. The Sr-capturing ability of Co/Fe oxide in combination with the Sr-blocking ability of GDC layer can effectively suppress the undesired reaction between LSCF and YSZ, and consequently improve the cell performance. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
关键词[WOS]: YTTRIA-STABILIZED ZIRCONIA ;  FUEL-CELLS ;  DOPED CERIA ;  OXYGEN ELECTRODES ;  VAPOR-DEPOSITION ;  CATHODE ;  TEMPERATURE ;  IMPEDANCE ;  SOFC ;  DEGRADATION
语种: 英语
WOS记录号: WOS:000390131200014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/151836
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, Div Fuel Cells, Dalian Natl Lab Clean Energy, Dalian 116023, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Yan, Jingbo,Shang, Lei,Zhao, Zhe,et al. Co/Fe oxide and Ce0.8Gd0.2O2-delta composite interlayer for solid oxide electrolysis cell[J]. JOURNAL OF ENERGY CHEMISTRY,2016,25(5):840-844.
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