Abstract: Energy and environmental problems become increasingly prominent with the development of human society. Solid oxide fuel cell (SOFC), as an efficient and environmentally friendly power generation device, has received wide attention from all walks of life. The performance of the cathode as an essential part of SOFC directly affects the efficiency of the battery. In recent years, the low temperature has become the development trend of SOFC. SOFC electrode materials with numerous mixed ionic and electronic conductors (MIECs) have provoked much interest because of their excellent catalytic performance in intermediate-temperature and low-temperature regions (500—800 ℃). Among them, layered LnBaCo2O5+δ perovskites are used as SOFC cathode, due to their excellent electrochemical properties in this temperature region, have been intensively investigated worldwide in recent years. This article focuses on the recent progress of the most actively studied family of layered LnBaCo2O5+δ perovskites in the last decade, and summarizes the influence of different doping methods on the properties of LnBaCo2O5+δ.
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