Recent development on perovskite-type cathode materials based on SrCoO_{3 - δ} parent oxide for intermediate-temperature solid oxide fuel cells

The slow oxygen reduction reaction kinetics as well as structural and chemical instability of cathode are the main barriers hindering the development of the solid oxide fuel cell operated at intermediate temperature. Therefore, immense efforts have been devoted to address these two demanding issues. Perovskite cathodes based on SrCoO_{3 - δ} show promising electroactivity on oxygen reduction at intermediate temperature but are susceptible to contaminates in air. In this short review, we mainly cover the recent advances in SrCoO_{3 - δ}-based perovskite cathode development, with emphasis on doping strategies in electroactivity enhancement and cathode tolerance to CO₂. Some future research directions are also recommended at the end of this review.