Recent Progress in Rare-Earth Element-based Cathode Materials for Solid Oxide Fuel Cells: A Mini Review
Abstract
The pressing global need for sustainable, and efficient energy sources has fueled the search for innovative approaches to energy production, storage, and delivery. Solid Oxide Fuel Cells (SOFC) offer a promising avenue for efficient energy transformation, with the cathode playing a pivotal role in facilitating electrochemical reactions within the cell. Two types of SOFC cathodes – proton-exchange (H-SOFC) and ion-exchange (O-SOFC) – are explored, highlighting cathode materials such as LaSrCoOx, LaSrCoFeOx, LaSrMnOx, LaSrFeMoOx, PrSrFeOx, PrSrCoFeOx, PrSrCoCuOx, NdBaSrCoFeOx, SrFeMoNiOx, LaSrCuNiOx, LaSrGeOx, and LaNiOx. The review discusses recent advancements in cathode materials, including studies on triple-phase boundaries and the effects of doping. Additionally, studies on tailored rare-earth-based cathode materials highlight their potential to enhance oxygen reduction reaction kinetics and tailor electrochemical properties for specific SOFC requirements.