Multifunctional anchoring effect enables ultra-stable 3D-printed zinc powder-based anode

IF 6.8 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science China Materials Pub Date : 2024-11-14 DOI:10.1007/s40843-024-3174-9

Leiqing Cao (, ), Fan Bu (, ), Yuxuan Wang (, ), Yong Gao (, ), Wenbo Zhao (, ), Jiayu Yang (, ), Jipeng Chen (, ), Xi Xu (, ), Cao Guan (, )

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引用次数: 0

Abstract

Zinc powder-based anodes encounter significant challenges, including severe side-reactions and non-uniform Zn plating-stripping processes. These issues lead to poor reversibility and low zinc utilization, which substantially impede their practical applications. Herein, we fabricated a multifunctional carbonyl-containing zinc metharcylate (ZMA) layer on the surface of three-dimensional (3D) zinc powder anode through in-situ modification. The ZMA layer with high electronegativity and highly nucleophilic carbonyl group assists the de-solvation process, which is conducive to the Zn²⁺ transport and homogenization of the ionic flux. In addition, the hydrophobic carbon chains in ZMA work as a protective layer to reduce the Zn powder direct contact with free-water and significantly improving side-reactions resistance. Finally, through the synergistic effect of ZMA and 3D Zn structure, the prepared electrode could cycle stably at 20 mA cm⁻²/20 mAh cm⁻² for 1153 h (depth of discharge: 38.10%). The stable 3D Zn-MnO₂ battery with a high capacity retention (84.2% over 500 cycles) is also demonstrated.

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多功能锚定效应使基于锌粉的超稳定 3D 打印阳极成为可能

锌粉基阳极面临着严峻的挑战，包括严重的副反应和不均匀的镀锌剥离过程。这些问题导致可逆性差和锌利用率低，严重阻碍了它们的实际应用。在此，我们通过原位改性在三维（3D）锌粉阳极表面制备了含羰基的多功能甲基丙烯酸锌（ZMA）层。具有高电负性和高亲核性羰基的 ZMA 层有助于脱溶过程，有利于 Zn2+ 的传输和离子通量的均匀化。此外，ZMA 中的疏水碳链还能起到保护层的作用，减少 Zn 粉末与自由水的直接接触，显著提高抗副反应能力。最后，通过 ZMA 和三维 Zn 结构的协同作用，制备的电极可以在 20 mA cm-2/20 mAh cm-2 的条件下稳定循环 1153 h（放电深度：38.10%）。三维 Zn-MnO2 电池的稳定性和高容量保持率（500 次循环 84.2%）也得到了证实。

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来源期刊

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.