In-situ constructing polyacrylamide interphase enables dendrite-free zinc anode in aqueous batteries

Zinc metal featuring intrinsic safety, low cost, and high volumetric capacity is an attractive anode material in aqueous batteries. However, the practical application of Zinc-based batteries is seriously impeded by the uneven stripping/plating of zinc ions as well as low coulombic efficiency due to...

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Bibliographic Details
Published in:Electrochimica acta 2021-05, Vol.378, p.138106, Article 138106
Main Authors: Zeng, Xiaomin, Meng, Xiangjuan, Jiang, Wei, Ling, Min, Yan, Lijing, Liang, Chengdu
Format: Article
Language:English
Subjects:
Acrylamide
Acrylamide additive
Anodes
Dendrite
Dendritic structure
Electrode materials
Electrolytes
Nucleation
Polyacrylamide
Zinc
Zinc anode
Zinc plating
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Summary:Zinc metal featuring intrinsic safety, low cost, and high volumetric capacity is an attractive anode material in aqueous batteries. However, the practical application of Zinc-based batteries is seriously impeded by the uneven stripping/plating of zinc ions as well as low coulombic efficiency due to the side reaction at the electrode-electrolyte interface. Herein, polyacrylamide interphase is constructed via in-situ polymerization of acrylamide additive, which can constrain freely lateral diffusion of zinc ions and suppress parasitic reactions, endowing zinc anode with homogeneous nucleation and high coulombic efficiency. With this method, a stable metal-electrolyte interface can be formed and a prolonged lifespan of more than 680 h at 1 mA cm−2 for 1 mA h cm−2 can be obtained.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2021.138106