LSM-infiltrated LSCF cathodes for solid oxide fuel cells

能源化学(英文) ›› 2013, Vol. 22 ›› Issue (4): 555-559.

• Communication • 上一篇下一篇

LSM-infiltrated LSCF cathodes for solid oxide fuel cells

Ze Liu^a,b, Mingfei Liu^b, Lei Yang^b, Meilin Liu^b

a. School of Chemical and Environmental Engineering, China University of Mining & Technology, Beijing 100083, China;
b. Center for Innovative Fuel Cell and Battery Technologies, School of Materials Science and Engineering,Georgia Institute of Technology, Atlanta, GA 30332 0245, USA

收稿日期:2012-12-02 修回日期:2013-01-21 出版日期:2013-07-20 发布日期:2013-07-27
通讯作者: Meilin Liu
基金资助:
This work was supported by the Department of Energy (National Energy Technology Laboratory) SECA Core Technology Program under Award Number DE-NT0006557 and DE-FE0009652 and by NSFC under grant No. 51002182.

LSM-infiltrated LSCF cathodes for solid oxide fuel cells

Ze Liu^a,b, Mingfei Liu^b, Lei Yang^b, Meilin Liu^b

a. School of Chemical and Environmental Engineering, China University of Mining & Technology, Beijing 100083, China;
b. Center for Innovative Fuel Cell and Battery Technologies, School of Materials Science and Engineering,Georgia Institute of Technology, Atlanta, GA 30332 0245, USA

Received:2012-12-02 Revised:2013-01-21 Online:2013-07-20 Published:2013-07-27
Supported by:
This work was supported by the Department of Energy (National Energy Technology Laboratory) SECA Core Technology Program under Award Number DE-NT0006557 and DE-FE0009652 and by NSFC under grant No. 51002182.

摘要/Abstract

摘要： Mixed ionic-electronic conductors in the family of La_xSr_1-xCo_yFe_1-yO_3-δ have been widely studied as cathode materials for solid oxide fuel cells (SOFCs). However, the long-term stability was a concern. Here we report our findings on the effect of a thin film coating of La_0.85Sr_0.15MnO_3-δ (LSM) on the performance of a porous La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ (LSCF) cathode. When the thicknesses of the LSM coatings are appropriate, an LSM-coated LSCF electrode showed better stability and lower polarization (or higher activity) than the blank LSCF cathode without LSM infiltration. An anode-supported cell with an LSM-infiltrated LSCF cathode demonstrated at 825 ℃ a peak power density of ～1.07 W/cm², about 24% higher than that of the same cell without LSM infiltration (～0.86 W/cm²). Further, the LSM coating enhanced the stability of the electrode; there was little degradation in performance for the cell with an LSM-infiltrated LSCF cathode during 100 h operation.

关键词: solid oxide fuel cell, LSCF, LSM, infiltration, cathode

Abstract: Mixed ionic-electronic conductors in the family of La_xSr_1-xCo_yFe_1-yO_3-δ have been widely studied as cathode materials for solid oxide fuel cells (SOFCs). However, the long-term stability was a concern. Here we report our findings on the effect of a thin film coating of La_0.85Sr_0.15MnO_3-δ (LSM) on the performance of a porous La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ (LSCF) cathode. When the thicknesses of the LSM coatings are appropriate, an LSM-coated LSCF electrode showed better stability and lower polarization (or higher activity) than the blank LSCF cathode without LSM infiltration. An anode-supported cell with an LSM-infiltrated LSCF cathode demonstrated at 825 ℃ a peak power density of ～1.07 W/cm², about 24% higher than that of the same cell without LSM infiltration (～0.86 W/cm²). Further, the LSM coating enhanced the stability of the electrode; there was little degradation in performance for the cell with an LSM-infiltrated LSCF cathode during 100 h operation.

Key words: solid oxide fuel cell, LSCF, LSM, infiltration, cathode

Ze Liu, Mingfei Liu, Lei Yang, Meilin Liu. LSM-infiltrated LSCF cathodes for solid oxide fuel cells[J]. 能源化学(英文), 2013, 22(4): 555-559.

Ze Liu, Mingfei Liu, Lei Yang, Meilin Liu. LSM-infiltrated LSCF cathodes for solid oxide fuel cells[J]. Journal of Energy Chemistry, 2013, 22(4): 555-559.

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LSM-infiltrated LSCF cathodes for solid oxide fuel cells

LSM-infiltrated LSCF cathodes for solid oxide fuel cells

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