摘要
1.Introduction.The easy protonic conduction in proton-conducting electrolytes enables solid oxide fuel cells(SOFCs)to achieve excellent power outputs at low temperatures(≤600°C,LTs),thereby promoting SOFC commercialization[1,2].However,the poor oxygen reduction reaction(ORR)on the cathode side becomes one main factor limiting the proton-conducting SOFC(H-SOFC)performance[3].Therefore,developing highly active cathode materials is crucial for H-SOFC application.Recently,high-entropy oxides(HEOs)have attracted significant attention as they offer extensive possibilities for tuning the material functionality[4,5].HEOs contain equimolar proportions of five or more different elements,and the configura-tional entropy values should exceed 1.5 R(where R is the molar gas constant)[6,7].Due to their unique chemical composition,highly disordered structure,and random distribution of multiple components,HEOs exhibit excellent physicochemical properties such as high ionic conductivity,fine stability,and outstanding dielectric constants[8,9].Then HEO materials hold potential applications in SOFCs and related electrocatalytic fields.
基金
supported by the National Nature Science Foundation of China(No.51802200)
the Startup Funding for Talents at the University of South China(No.201RGC018).
