Interfacial Engineering of Zn Metal via a Localized Conjugated Layer for Highly Reversible Aqueous Zinc Ion Battery

Author:

Liu Zhenjie1,Li Guanjie2ORCID,Xi Murong1,Huang Yudai1,Li Haobo2,Jin Huanyu2,Ding Juan1,Zhang Shilin2,Zhang Chaofeng3ORCID,Guo Zaiping2ORCID

Affiliation:

1. State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of Chemistry Xinjiang University Urumqi 830017 Xinjiang China

2. School of Chemical Engineering The University of Adelaide Engineering North North Terrace Campus the University of Adelaide Adelaide South Australia 5069 Australia

3. Institutes of Physical Science and Information Technology Leibniz Joint Research Center of Materials Sciences Engineering Laboratory of High-Performance Waterborne Polymer Materials of Anhui Province Anhui Graphene Engineering Laboratory Key Laboratory of Structure and Functional Regulation of Hybrid Material (Ministry of Education) Anhui University Hefei 230601 China

Abstract

AbstractAqueous 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.

Funder

National Natural Science Foundation of China

Australian Research Council

China Scholarship Council

Publisher

Wiley

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