LSM-infiltrated LSCF cathodes for solid oxide fuel cells |
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| Authors: | Ze Liu Mingfei Liu Lei Yang Meilin Liu |
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| Institution: | 1. School of Chemical and Environmental Engineering, China University of Mining & Technology, Beijing 100083, China;2. Center for Innovative Fuel Cell and Battery Technologies, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332 0245, USA;3. New Energy Research Institute, College of Environment and Energy, South China University of Technology, Guangzhou 510006, Guangdong, China |
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| Abstract: | Mixed ionic-electronic conductors in the family of LaxSr1–xCoyFe1–yO3–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 La0.85Sr0.15MnO3–δ (LSM) on the performance of a porous La0.6Sr0.4Co0.2Fe0.8O3–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 °C 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. |
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| Keywords: | solid oxide fuel cell (SOFC) infiltration cathode |
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