Interfacial Engineering of Zn Metal via a Localized Conjugated Layer for Highly Reversible Aqueous Zinc Ion Battery
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Date
2024
Authors
Liu, Z.
Li, G.
Xi, M.
Huang, Y.
Li, H.
Jin, H.
Ding, J.
Zhang, S.
Zhang, C.
Guo, Z.
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Journal article
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Angewandte Chemie International Edition, 2024; 63(14):e202319091-1-e202319091-9
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Zhenjie Liu, Guanjie Li, Murong Xi, Yudai Huang, Haobo Li, Huanyu Jin, Juan Ding, Shilin Zhang, Chaofeng Zhang, and Zaiping Guo
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Abstract
Aqueous zinc-ion batteries are regarded as promising and efficient energy storage systems owing to remarkable safety and satisfactory capacity. Nevertheless, the instability of zinc metal anodes, characterized by issues such as dendrite growth and parasitic side reactions, poses a significant barrier to widespread applications. Herein, we address this challenge by designing a localized conjugated structure comprising a cyclic polyacrylonitrile polymer (CPANZ), induced by a Zn2+-based Lewis acid (zinc trifluoromethylsulfonate) at a temperature of 120 °C. The CPANZ layer on the Zn anode, enriched with appropriate pyridine nitrogen-rich groups (conjugated cyclic C=N ), exhibits a notable affinity for Zn2+ with ample deposition sites. This zincophilic skeleton not only serves as a protective layer to guide the deposition of Zn2+ but also functions as proton channel blocker, regulating the proton flux to mitigate the hydrogen evolution. Additionally, the strong adhesion strength of the CPANZ layer guarantees its sustained protection to the Zn metal during long-term cycling. As a result, the modified zinc electrode demonstrates long cycle life and high durability in both half-cell and pouch cells. These findings present a feasible approach to designing high performance aqueous anodes by introducing a localized conjugated layer.
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© 2024 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.