Inducing Fe 3d Electron Delocalization and Spin-State Transition of FeN4 Species Boosts Oxygen Reduction Reaction for Wearable Zinc–Air Battery

Nano-Micro Letters

Article

Chi-Man Lawrence Wu¹  Chunyi Zhi¹  Shengmei Chen¹  Shuyun Wang¹  Juan Antonio Zapien¹  Xiongyi Liang¹  Xinliang Li¹  Longtao Ma²  Sixia Hu³  Guobin Zhang⁴ 

[1] Department of Materials Science and Engineering, City University of Hong Kong, 999077, Hong Kong, People’s Republic of China;Frontiers Science Center for Flexible Electronics, Institute of Flexible Electronics, Northwestern Polytechnical University, 710072, Xi’an, People’s Republic of China;Sustech Core Research Facilities, Southern University of Science and Technology, 1088 Xueyuan Blvd, 518055, Shenzhen, Guangdong, People’s Republic of China;Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518055, People’s Republic of China;

关键词: d;    Spin-state transition;    Oxygen reduction reaction;    Wearable zinc–air batteries;   

DOI  :  10.1007/s40820-023-01014-8

 received in 2022-10-01, accepted in 2022-12-26,  发布年份 2022

来源: Springer

【 摘 要 】

tsThe strong interaction between Ti3C2Sx and FeN4 species induces the central metal Fe(II) in FeN4 species with intermediate spin state transferred to high spin state, in which the latter is favorable to initiate the reduction of oxygen.This strong interaction induces a remarkable Fe 3d electron delocalization with d band center upshift, boosting oxygen-containing groups adsorption on FeN4 species and oxygen reduction reaction kinetics.The resulting FeN4–Ti3C2Sx with FeN4 moieties in high spin state exhibits high half-wave potential of 0.89 V vs. RHE and high limiting current density of 6.5 mA cm−2, enabling wearable zinc–air battery showing a good discharge performance with a maximum power density of 133.6 mW cm−2.

【 授权许可】

CC BY   
© The Author(s) 2023

【 图 表 】

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