Asymmetric Coordination of Bimetallic Fe-Co Single-Atom Pairs toward Enhanced Bifunctional Activity for Rechargeable Zinc-Air Batteries

Li, Zhitong1; Zhong, Xiongwei1; Gao, Leyi1; Hu, Junjie1; Peng, Wenbo1; Wang, Xingzhu1; Zhou, Guangmin2,3; Xu, Baomin1

2024-05-13

10.1021/acsnano.4c01342

ACS NANO   影响因子和分区

1936-0851

1936-086X

The advancement of rechargeable zinc-air batteries (RZABs) faces challenges from the pronounced polarization and sluggish kinetics of oxygen reduction and evolution reactions (ORR and OER). Single-atom catalysts offer an effective solution, yet their insufficient or singular catalytic activity hinders their development. In this work, a dual single-atom catalyst, FeCo-SAs, was fabricated, featuring atomically dispersed N-3-Fe-Co-N-4 sites on N-doped graphene nanosheets for bifunctional activity. Introducing Co into Fe single-atoms and secondary pyrolysis altered Fe coordination with N, creating an asymmetric environment that promoted charge transfer and increased the density of states near the Fermi level. This catalyst achieved a narrow potential gap of 0.616 V, with a half-wave potential of 0.884 V for ORR (vs the reversible hydrogen electrode) and a low OER overpotential of 270 mV at 10 mA cm(-2). Owing to the superior activity of FeCo-SAs, RZABs exhibited a peak power density of 203.36 mW cm(-2) and an extended cycle life of over 550 h, exceeding the commercial Pt/C + IrO2 catalyst. Furthermore, flexible RZABs with FeCo-SAs demonstrated the promising future of bimetallic pairs in wearable energy storage devices.

bimetallic single-atom pairs asymmetric coordination oxygen evolution reaction oxygen reduction reaction rechargeable zinc-air batteries

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China["U19A2089","52072205","22309077"] ; National Natural Science Foundation of China[2019YFA0705700] ; Key Fundamental Research (Discipline Arrangement)["JCYJ20200109141014474","JCYJ20220818100406014"] ; Shenzhen Science and Technology Innovation Committee[2022A1515110117]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:001225288600001

AMER CHEMICAL SOC

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
2.Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Shenzhen Geim Graphene Ctr, Shenzhen 518055, Peoples R China
3.Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China

Li, Zhitong,Zhong, Xiongwei,Gao, Leyi,et al. Asymmetric Coordination of Bimetallic Fe-Co Single-Atom Pairs toward Enhanced Bifunctional Activity for Rechargeable Zinc-Air Batteries[J]. ACS NANO,2024,18(20).

Li, Zhitong.,Zhong, Xiongwei.,Gao, Leyi.,Hu, Junjie.,Peng, Wenbo.,...&Xu, Baomin.(2024).Asymmetric Coordination of Bimetallic Fe-Co Single-Atom Pairs toward Enhanced Bifunctional Activity for Rechargeable Zinc-Air Batteries.ACS NANO,18(20).

Li, Zhitong,et al."Asymmetric Coordination of Bimetallic Fe-Co Single-Atom Pairs toward Enhanced Bifunctional Activity for Rechargeable Zinc-Air Batteries".ACS NANO 18.20(2024).