首页|Enhanced bifunctional oxygen electrochemical catalytic performance using La-doped CoFe2O4 spinel supported by 3D-G for Zn-air batteries

Enhanced bifunctional oxygen electrochemical catalytic performance using La-doped CoFe2O4 spinel supported by 3D-G for Zn-air batteries

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The preparation of bifunctional catalysts for oxygen reduction(ORR)and oxygen evolution(OER)is cru-cial for Zn-air batteries.Here,we report a La doped CoFe2O4 spinel catalyst supported on three-dimensional graphene(3D-G),where La can facilitate electron transfer from Co to Fe,leading to increased electron cloud density in Fe and improved catalytic performance.The redshift of the G peak in the Raman spectra indicates the interaction between the π bond of 3D-G and d orbitals in La0.2CoFe1.8O4.La0.2CoFe1.8/3D-G exhibits superior ORR performance(E1/2=0.86 V vs.RHE)and OER performance(Ej=10=1.55 V vs.RHE)to CoFe2O4/3D-G(E1/2=0.831 V vs.RHE,Ej=10=1.603 V vs.RHE).Furthermore,it demonstrates excellent bifunctional oxygen catalytic performance while maintaining high power den-sity and stability in liquid zinc-air batteries(ZABs)and flexible ZABs(F-ZABs).This work presents a viable strategy for utilizing rare earth element doped spinels to enhance oxygen catalyst and ZABs performance.

Zn-air batteriesElectrocatalystsLa0.2CoFe1.8O4/3D-GElectron pumpBifunctional oxygen catalytic performance

Yinggang Sun、Tingwei Zhang、Peng Sun、Jigang Wang、Wenjie Duan、Yanqiong Zhuang、Likai Wang、Zhongfang Li

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School of Chemistry and Chemical Engineering,Shandong University of Technology,Zibo 255049,Shandong,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Shandong Province,China

2217209321776167ZR2023MB061

2024

10.1016/j.jechem.2024.03.019

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.94(7)