Balancing intrinsic properties of cathode materials allows high performance for protonic ceramic fuel cells  

作　　者：Yanru Yin Bo Liu Dong Yan Jian Li Lichao Jia 

机构地区：[1]School of Materials Science and Engineering,State Key Laboratory of Materials Processing and Die&Mould Technology,Huazhong University of Science and Technology,Wuhan,China

出　　处：《SusMat》2024年第6期1-13,共13页可持续发展材料(英文)

基　　金：National Natural Science Foundation of China,Grant/Award Numbers:52072134,52302255,52272205;Hubei Province,Grant/Award Numbers:2021BCA149,2021CFA072,2022BAA087;Science and Technology Innovation Teams of Shanxi Province,Grant/Award Number:202304051001007。

摘　　要：The cathode performance significantly impacts the overall performance of protonic ceramic fuel cells(PCFCs).Many properties of the material,such as oxygen vacancies,protonation,charge carrier transport abilities,and surface oxygen reduction reaction activity,can affect cathode performance.However,which parameter has more weight is still being debated.In this work,we use Ba_(0.5)Sr_(0.5)Zr_(0.25)Fe_(0.65)X_(0.1)O_(3)as a case study(X=Zn,Cu,Mn,Ni,and Co).Firstprinciple calculations and experimental research are used to study and compare the critical parameters that determine cathode performance.It is discovered that no dopant can improve all the properties of the material.Balancing distinct intrinsic properties is a viable and rational approach.Themore balanced,the better performance.When compared to other dopants,nickel dopant is shown to be the most effective in the Ba_(0.5)Sr_(0.5)Zr_(0.25)Fe_(0.65)X_(0.1)O_(3)material system,allowing a high fuel cell performances of 1862,1450,and 1085 mW cm^(−2)at 700℃,650℃,and 600℃,with a low polarization resistance of 0.041Ωcm^(2)at 700℃,which is higher than the majority of cobalt-free cathodes for PCFCs.The current study not only presents a promising cathode candidate,but more importantly,also an effective and fundamental methodology to design cathodes for PCFCs.

关 键 词：CATHODE high performance protonic ceramic fuel cells solid oxide fuel cell 

分 类 号：TM9[电气工程—电力电子与电力传动]