Perovskite cathode for solid oxide fuel cells

Solid-oxide fuel cells(SOFC_s) have attracted considerable attentions due to their high energy conversion efficiency,high power density and extremely low pollution.Perovskite-based materials have been widely used as cathode materials for SOFCs because of their high mixed ionic-electronic conductivity(MIEC) and favorable catalytic activity.The recent progress on the perovskite-based cathode materials for intermediate-to-low temperature SOFCs was reviewed.In order to find a way to satisfy the strict requirements of cathode,the phase stability,electronic and/or ionic conductivity,and catalytic activity of A_(1-x)Sr_xCoO_3,A_(1-x)Sr_xCo_(1-y)FeyO_(3-δ),SrSc_xCo_(1-x)O_(3-δ) and double perovskite materials were focused.The main problems of current perovskite-based cathodes for practical application are pointed out and the possible future research directions are proposed.