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

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

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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/S-NC catalysts show outstanding performance for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER).FeCo/S-NC shows a high half-wave potential(E1/2=0.8823 V)for ORR and a low overpo-tential at 10 mA cm-2(Ej-10-299 mV)for OER.In addition,compared with Pt/C+Ru02 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 gZn-1),and ultra-stable cycle performance.These results confirm that the optimized composition and the interfacial interaction between catalyst and carbon substrate synergisti-cally enhance the electrochemical performance.

FeCo alloyN,S co-doped carbonDFT calculationZn-air batteriesInterfacial interaction

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

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School of Materials Science and Engineering,Northeastern University,Shenyang 110819,Liaoning,China

Key Laboratory of Functional Inorganic Material Chemistry,Ministry of Education,School of Chemistry and Materials Science,Heilongjiang University,Harbin 150080,Heilongjiang,China

Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province,School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,Hebei,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFundamental Research Funds for the Central UniversitiesHebei Key Laboratory of Dielectric and Electrolyte Functional Material,Northeastern University at QinhuangdaoPerformance subsidy fund for the Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province

5237430122279030N2223037HKDEFM202120122567627H

2024

10.1016/j.jechem.2024.02.044

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)：2024.93(6)
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