Highly sulfur poisoning-tolerant BaCeO3-impregnated La0.6Sr0.4Co0.2Fe0.8O3-δ cathodes for solid oxide fuel cells

被引：14
|
作者：
Wang, Cheng Cheng [1 ,2 ,3 ]
Luo, Dawei [4 ]
Jiang, San Ping [2 ,3 ]
Lin, Bin [5 ]
机构：
[1] Shen Zhen Polytech, Inst Innovat & Entrepreneurship, Shenzhen 518055, Peoples R China
[2] Curtin Univ, Dept Chem Engn, Perth, WA 6102, Australia
[3] Curtin Univ, Fuels & Energy Technol Inst, Perth, WA 6102, Australia
[4] Shenzhen Polytech, Sch Appl Chem & Biol Technol, Shenzhen 518055, Peoples R China
[5] Univ Elect Sci & Technol China, Sch Mat & Energy, Chengdu 611731, Sichuan, Peoples R China
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2018年 / 51卷 / 43期
基金：
中国国家自然科学基金; 澳大利亚研究理事会;
关键词：
solid oxide fuel cells; LSCF electrodes; sulfur tolerance; BaCeO3-impregnated LSCF electrodes; BACEO3-BASED PROTON CONDUCTOR; ENHANCED CHROMIUM TOLERANCE; NANO-STRUCTURED ELECTRODES; PERFORMANCE; STABILITY; DEGRADATION; FABRICATION; DEPOSITION; PALLADIUM;
D O I：
10.1088/1361-6463/aadf4c
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Electrochemical performance and sulfur (SO2) tolerance were studied on pristine La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF) and BaCeO3-impregnated LSCF (BaCeO3-LSCF) composite cathodes of solid oxide fuel cells (SOFCs). Compared to pristine LSCF electrodes, BaCeO3-LSCF composite electrodes exhibited reduced electrode polarization resistance and significantly lower activation energy for the O-2 reduction reaction, indicating that BaCeO2 impregnation is effective at promoting the electrocatalytic activity of LSCF electrodes at low temperatures. Most significantly, BaCeO3-LSCF cathodes show remarkable tolerance and resistance towards sulfur via the formation of BaSO4 instead of SrSO4 on the electrode surface, preventing excess Sr deficiency at the A-site of LSCF perovskite and thus mitigating the sulfur poisoning effect. BaCeO3-LSCF cathodes show potential as highly active and excellent anti-sulfur oxygen electrodes for SOFCs.
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页数：8
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