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对于超稳定的金属阳极,二元电解质添加剂增强接口分子吸附层
Kai Liu1, Mingzi Sun2,3, Yan Wu4
1Department of Materials Science and Engineering and Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong SAR, 999077, China.
Advanced materials (Deerfield Beach, Fla.)
|March 20, 2025
概括
一种天然的添加剂混合物 - - 沙波宁和阿尼萨尔海德 - - 稳定水性电池中的阳极,防止树的生长和的演变. 这提高了电池寿命和性能.
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) 对可持续的储能充满希望.
- 关键的挑战包括Zn极的不稳定性,进化反应 (HER) 和树的生长.
- 这些问题限制了AZIB的周期寿命和安全性.
研究的目的:
- 在AZIB中开发一个稳定的接口层,用于Zn阳极保护.
- 为了抑制HER,并防止树突的形成.
- 为了提高AZIB的整体性能和寿命.
主要方法:
- 引入了一种天然的二元添加剂:沙宁和化.
- 改造电双层 (EDL) 结构以进行界面吸附.
- 调查沙波宁和异甲之间的分子间结.
- 分析异甲与H*的电催化合,以抑制HER.
- 验证Zn沉积过程中异甲的结构演变.
主要成果:
- 形成一个强大的无机固体电解质间相 (SEI).
- 一个对称的单元实现了超长的循环:在1 mA cm-2下3400小时,在10 mA cm-2下1700小时.
- 在20 mA cm-2.2 的情况下,可逆运行450小时.
- 离子混合电容器的寿命达到了10万个循环.
结论:
- 一个简单的,协同作用的策略有效地提高了阳极/电解质接口的稳定性.
- 萨波宁-化添加剂显示出在高性能AZIB中保护Zn阳极的巨大潜力.
- 这种方法为开发更安全,更持久的水性能源存储系统提供了途径.
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