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Zincophilic Sn sites induced the local ion enrichment for compact and homogenous growth of Zn biscuits in long-life Zn metal batteries
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2024-01-03 , DOI: 10.1039/d3ta06613d Tiancun Liu 1 , Yi Xu 2 , Haoyan Fang 2 , Ling Chen 2 , Jiadi Ying 1 , Min Guo 1 , Yeqing Wang 1 , Qi Shen 1 , Xusheng Wang 3 , Yong Wang 2 , Zhixin Yu 1
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2024-01-03 , DOI: 10.1039/d3ta06613d Tiancun Liu 1 , Yi Xu 2 , Haoyan Fang 2 , Ling Chen 2 , Jiadi Ying 1 , Min Guo 1 , Yeqing Wang 1 , Qi Shen 1 , Xusheng Wang 3 , Yong Wang 2 , Zhixin Yu 1
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The inevitable formation of zinc (Zn) dendrites and side reactions impede the practical applications of long-life and stable Zn metal batteries (ZMBs). Herein, a self-supporting and zincophilic skeleton, reduced copper foam containing Sn sites (R-CF@Sn), is constructed to induce dense and homogenous Zn growth for enhancing the performance of Zn metal anode and ZMBs. A facile and effective decoration of functional Sn coating not only exhibited a high Zn ion adsorption energy to promote the uniform distribution and local enrichment, but also guided the subsequent stable Zn nucleation and dense biscuit-like Zn metal development, which was substantiated by microscopy images. Due to the positive construction of zincophilic Sn layer and rough skeleton surface, the electrolyte wettability of R-CF@Sn was greatly improved compared to that of bare copper substrate. When applied for evaluating the coulombic efficiency (CE) performance, the R-CF@Sn skeleton showed a low nucleation overpotential of 6.6 mV and maintained a high average CE value of 98% for 400 cycles at 5 mA cm−2. Moreover, a symmetric cell with R-CF@Sn plating with Zn metal of 3 mA h cm−2 could deliver prolonged lifespans of 1600 h (1 mA cm−2) and 700 h (5 mA cm−2) at a plating/stripping capacity of 1 mA h cm−2. The superior specific capacity delivery of the full cell with an MnO2 cathode further indicates the positive effect of stabilizing the Zn metal anode possessed by the R-CF@Sn skeleton.
中文翻译：
亲锌锡位点诱导局部离子富集，从而实现长寿命锌金属电池中锌饼干的紧凑且均匀的生长
锌（Zn）枝晶的不可避免的形成和副反应阻碍了长寿命和稳定的锌金属电池（ZMB）的实际应用。在此，构建了一种自支撑和亲锌骨架，即含有锡位点的还原泡沫铜（R-CF@Sn），以诱导致密且均匀的锌生长，从而提高锌金属阳极和ZMB的性能。功能性锡涂层的简便有效的装饰不仅表现出高锌离子吸附能，促进均匀分布和局部富集，而且引导随后稳定的锌成核和致密的饼干状锌金属发展，这一点已被显微镜图像证实。 。由于亲锌Sn层的正向结构和粗糙的骨架表面，R-CF@Sn的电解液润湿性与裸铜基板相比大大提高。当用于评估库仑效率（CE）性能时，R-CF@Sn骨架表现出6.6 mV的低成核过电势，并在5 mA cm -2 下400次循环后保持98%的高平均CE值。此外，具有3 mA h cm -2 Zn金属的R-CF@Sn镀层的对称电池可以在镀/镀层时提供1600小时（1 mA cm -2）和700小时（5 mA cm -2 ）的延长寿命。 1 mA h cm -2的剥离能力。具有MnO 2阴极的全电池优异的比容量传递进一步表明了R-CF@Sn骨架所具有的稳定Zn金属阳极的积极作用。
更新日期：2024-01-03
中文翻译：
亲锌锡位点诱导局部离子富集，从而实现长寿命锌金属电池中锌饼干的紧凑且均匀的生长
锌（Zn）枝晶的不可避免的形成和副反应阻碍了长寿命和稳定的锌金属电池（ZMB）的实际应用。在此，构建了一种自支撑和亲锌骨架，即含有锡位点的还原泡沫铜（R-CF@Sn），以诱导致密且均匀的锌生长，从而提高锌金属阳极和ZMB的性能。功能性锡涂层的简便有效的装饰不仅表现出高锌离子吸附能，促进均匀分布和局部富集，而且引导随后稳定的锌成核和致密的饼干状锌金属发展，这一点已被显微镜图像证实。 。由于亲锌Sn层的正向结构和粗糙的骨架表面，R-CF@Sn的电解液润湿性与裸铜基板相比大大提高。当用于评估库仑效率（CE）性能时，R-CF@Sn骨架表现出6.6 mV的低成核过电势，并在5 mA cm -2 下400次循环后保持98%的高平均CE值。此外，具有3 mA h cm -2 Zn金属的R-CF@Sn镀层的对称电池可以在镀/镀层时提供1600小时（1 mA cm -2）和700小时（5 mA cm -2 ）的延长寿命。 1 mA h cm -2的剥离能力。具有MnO 2阴极的全电池优异的比容量传递进一步表明了R-CF@Sn骨架所具有的稳定Zn金属阳极的积极作用。
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