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

Wang, C.; Luo, D.; Jiang, San Ping; Lin, B.

doi:10.1088/1361-6463/aadf4c

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Authors

Wang, C.

Luo, D.

Jiang, San Ping

Lin, B.

Date

2018

Type

Journal Article

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Citation

Wang, C. and Luo, D. and Jiang, S.P. and Lin, B. 2018. Highly sulfur poisoning-tolerant BaCeO3-impregnated La0.6Sr0.4Co0.2Fe0.8O3−δ cathodes for solid oxide fuel cells. Journal of Physics D: Applied Physics. 51: 435502.

Source Title

Journal of Physics D: Applied Physics

DOI

10.1088/1361-6463/aadf4c

ISSN

0022-3727

School

Fuels and Energy Technology Institute

Abstract

© 2018 IOP Publishing Ltd. Electrochemical performance and sulfur (SO2) tolerance were studied on pristine La0.6Sr0.4Co0.2Fe0.8O3-d(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 O2reduction reaction, indicating that BaCeO2impregnation 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 BaSO4instead of SrSO4on 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.