B-site high-entropy tailoring K2NiF4 oxide as an effective cathode for proton-conducting solid oxide fuel cells  

作　　者：Junyi Gong Jie Hou 

机构地区：[1]School of Resource Environment and Safety Engineering,University of South China,Hengyang 421001,China

出　　处：《Journal of Materials Science & Technology》2024年第19期158-163,共6页材料科学技术（英文版）

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).

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.

关 键 词：CONDUCTING ENTROPY OXIDE 

分 类 号：TM911.4[电气工程—电力电子与电力传动]