Tuning interface mechanism of FeCo alloy embedded N,S-codoped carbon substrate for rechargeable Zn-air battery  

作　　者：Hui Chang Lulu Zhao Shan Zhao Zong-Lin Liu Peng-Fei Wang Ying Xie Ting-Feng Yi 

机构地区：[1]School of Materials Science and Engineering,Northeastern University,Shenyang 110819,Liaoning,China [2]Key Laboratory of Functional Inorganic Material Chemistry,Ministry of Education,School of Chemistry and Materials Science,Heilongjiang University,Harbin 150080,Heilongjiang,China [3]Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province,School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,Hebei,China

出　　处：《Journal of Energy Chemistry》2024年第6期400-410,I0010,共12页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(52374301 and 22279030);the Fundamental Research Funds for the Central Universities(N2223037);Hebei Key Laboratory of Dielectric and Electrolyte Functional Material,Northeastern University at Qinhuangdao(HKDEFM2021201);the Performance subsidy fund for the Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province(22567627H)。

摘　　要：The interface mechanism between catalyst and carbon substrate has been the focus of research.In this paper,the FeCo alloy embedded N,S co-doped carbon substrate bifunctional catalyst(FeCo/S-NC)is obtained by a simple one-step pyrolysis strategy.The experimental results and density functional theory(DFT)calculation show that the formation of FeCo alloy is conducive to promoting electron transfer,and the introduction of S atom can enhance the interaction between FeCo alloy and carbon substrate,thus inhibiting the migration and agglomeration of particles on the surface of carbon material.The FeCo/SNC catalysts show outstanding performance for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER).FeCo/S-NC shows a high half-wave potential(E_(1/2)=0.8823 V)for ORR and a low overpotential at 10 mA cm^(-2)(E_(j=10)=299 mV)for OER.In addition,compared with Pt/C+RuO_(2) assembled Zn-air battery(ZAB),the FeCo/S-NC assembled ZAB exhibits a larger power density(198.8 mW cm^(-2)),a higher specific capacity(786.1 mA h g_(zn)~(-1)),and ultra-stable cycle performance.These results confirm that the optimized composition and the interfacial interaction between catalyst and carbon substrate synergistically enhance the electrochemical performance.

关 键 词：FeCo alloy N S co-doped carbon DFT calculation Zn-air batteries Interfacial interaction 

分 类 号：TM911.41[电气工程—电力电子与电力传动] TQ426[化学工程]