用于高性能锌离子电池的超快速且可扩展的盐水浸渍策略，可实现均匀的锌成核与沉积

Ultra-Fast and Scalable Saline Immersion Strategy Enabling Uniform Zn Nucleation and Deposition for High-Performance Zn-Ion Batteries.

作者信息

Xu Xilian, Chen Ye, Zheng Dong, Ruan Pengchao, Cai Yanhui, Dai Xiaojing, Niu Xinxin, Pei Chengjie, Shi Wenhui, Liu Wenxian, Wu Fangfang, Pan Zhiyan, Li Hai, Cao Xiehong

机构信息

College of Materials Science and Engineering, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, China.

Key Laboratory of Flexible Electronics and Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, China.

出版信息

Small. 2021 Aug;17(33):e2101901. doi: 10.1002/smll.202101901. Epub 2021 Jul 6.

DOI:10.1002/smll.202101901

PMID:34228384

Abstract

Although aqueous Zn-ion batteries (ZIBs) with low cost and high safety show great potential in large-scale energy storage system, metallic Zn anode still suffers from unsatisfactory cycle stability due to unregulated growth of Zn dendrites, corrosion, and formation of various side products during electrochemical reaction. Here, an ultrafast and simple method to achieve a stable Zn anode is developed. By simply immersing a Zn plate into an aqueous solution of CuSO for only 10-60 s, a uniform and robust protective layer (Zn SO (OH) ·5H O/Cu O) is formed on commercial Zn plate (Zn/ZCO), which enables uniform electric field distribution and controllable dendrite growth, leading to a long-term cycle life of over 1400 h and high average Coulombic efficiency (CE) of 99.2% at 2.0 mA cm and 2.0 mAh cm . These excellent characteristics of the prepared Zn anode show great potential in practical applications for high-performance aqueous Zn-ion batteries.

摘要

尽管具有低成本和高安全性的水系锌离子电池（ZIBs）在大规模储能系统中显示出巨大潜力，但金属锌阳极由于锌枝晶的无节制生长、腐蚀以及电化学反应过程中各种副产物的形成，其循环稳定性仍不尽人意。在此，开发了一种超快且简单的方法来实现稳定的锌阳极。通过将锌板简单地浸入硫酸铜水溶液中仅10 - 60秒，在商用锌板（Zn/ZCO）上形成了均匀且坚固的保护层（Zn₃SO₄(OH)₄·5H₂O/Cu₂O），这使得电场分布均匀且枝晶生长可控，从而在2.0 mA cm⁻²和2.0 mAh cm⁻²的条件下实现了超过1400小时的长期循环寿命以及99.2%的高平均库仑效率（CE）。所制备的锌阳极的这些优异特性在高性能水系锌离子电池的实际应用中显示出巨大潜力。