Abstract
A cobalt-free perovskite-type cathode material La0.6Sr0.4Fe0.9Cr0.1O3−α (LSFC10) was prepared by a citric acid–nitrate process and investigated as a potential cathode material for proton-conducting intermediate-temperature solid oxide fuel cells (IT-SOFCs). The maximum conductivity of LSFC10 reached 138Scm−1 under oxygen at 550°C. A Ni-BZCY composite anode-supported proton-conducting BaZr0.1Ce0.7Y0.2O3−α (BZCY) electrolyte membrane was successfully fabricated by a simple, cost-effective spin coating process. The peak power densities of the H2/O2 fuel cell using BZCY electrolyte membrane, Ni-BZCY composite anode and LSFC10 cathode reached 412mWcm−2, and the interfacial polarization resistance for the fuel cell was as low as 0.19Ωcm2 under open circuit conditions, at 700°C. These results reveal LSFC10 is a suitable cathode material for proton-conducting IT-SOFCs.
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