SUPPRESSING CATION SEGREGATION ON PEROVSKITE SURFACES TO DESIGN HIGH PERFORMANCE CATHODE MATERIALS IN SOLID OXIDE FUEL CELLS

摘要

Deterioration of oxygen reduction reaction (ORR) kinetics in the cathode side can be a main limiting factor for the overall performance of solid oxide fuel cells (SOFCs) that are a promising sustainable energy conversion device. The A-site cation segregation on perovskite surfaces may decrease the rate of ORR. It is therefore necessary to elucidate the underlying mechanism of the cation segregation for designing the new cathodes with high reactivity and stability in ORR.