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电气双层和现场聚合SEI使高可逆金属阳极成为可能

Hongting Yin¹, Hao Wu¹, Yu Yang¹

¹School of Chemical & Environmental Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|September 30, 2024

概括

4-乙烯基硫酸盐 (VBS) 有效地抑制水性离子电池 (AZIB) 中的树石的形成. 这种电解质添加剂创造了一个保护性的有机离子层,显著提高了电池循环寿命和性能.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
储能储能储能储能储能储能

背景情况:

水性离子电池 (AZIB) 提供安全和环保的能源存储.
阳极树突的形成和副作用阻碍了AZIB的商业化.
开发有效的电解质添加剂对于改善AZIB稳定性至关重要.

研究的目的:

调查4-乙烯硫酸盐 (VBS) 作为AZIBs的多功能电解质添加剂.
阐明VBS提高阳极性能的机制.
评估VBS对AZIB的自行车稳定性和容量的影响.

主要方法:

电解质添加剂选和选择:4-维尼尔二硫酸盐 (VBS).
对 Zn//Zn 对称细胞和 Zn//δ-MnO₂全细胞的电化学性能测试.
分析电解质结构和阳极表面化学.

主要成果:

VBS离子改变了水键网络,并在阳极上形成了有机离子丰富的接口.
VBS促进现场聚合,形成一个稳定的固体电解质接口 (SEI) 层.
带有VBS的 Zn//Zn对称电池在1 mA cm-2和1 mAh cm-2的稳定循环中实现了超过1800小时的稳定循环.
VBS增强了Zn//δ-MnO₂全细胞的循环性能和容量.

结论:

4-乙烯基硫酸盐 (VBS) 有效地减轻了AZIBs中的树形成和副作用.
该VBS添加剂显著提高了AZIBs的电化学性能和周期寿命.
本研究提出了一种成本效益高的策略,用于推进AZIB技术.

关键词:

水性离子电池水性离子电池电气双层的电气双层.电解质添加剂是一种电解质添加剂.一致的沉积方式阳极是一种阳极.

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