Liu Congcong, Lu Qiongqiong, Omar Ahmad, Mikhailova Daria
Leibniz Institute for Solid State and Materials Research (IFW) Dresden e.V., 01069 Dresden, Germany.
Nanomaterials (Basel). 2021 Mar 18;11(3):764. doi: 10.3390/nano11030764.
Rechargeable aqueous Zn-ion batteries (ZIBs) have gained great attention due to their high safety and the natural abundance of Zn. Unfortunately, the Zn metal anode suffers from dendrite growth due to nonuniform deposition during the plating/stripping process, leading to a sudden failure of the batteries. Herein, Cu coated Zn (Cu-Zn) was prepared by a facile pretreatment method using CuSO aqueous solution. The Cu coating transformed into an alloy interfacial layer with a high affinity for Zn, which acted as a nucleation site to guide the uniform Zn nucleation and plating. As a result, Cu-Zn demonstrated a cycling life of up to 1600 h in the symmetric cells and endowed a stable cycling performance with a capacity of 207 mAh g even after 1000 cycles in the full cells coupled with a VO-based cathode. This work provides a simple and effective strategy to enable uniform Zn deposition for improved ZIBs.
可充电水系锌离子电池（ZIBs）因其高安全性和锌的天然丰富性而备受关注。不幸的是，锌金属负极在电镀/剥离过程中由于不均匀沉积而出现枝晶生长，导致电池突然失效。在此，通过使用硫酸铜水溶液的简便预处理方法制备了铜包覆锌（Cu-Zn）。铜涂层转变为对锌具有高亲和力的合金界面层，该界面层作为成核位点来引导均匀的锌成核和电镀。结果，Cu-Zn在对称电池中表现出高达1600小时的循环寿命，并且在与基于VO的正极耦合的全电池中即使经过1000次循环后仍具有207 mAh g的容量的稳定循环性能。这项工作提供了一种简单有效的策略，以实现均匀的锌沉积，从而改进锌离子电池。
