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一个"盐中的Zn2+"间相使高性能Zn金属阳极成为可能
Mengxi Bai1, Jingtao Chen1, Qiufen Li1
1Department of Materials Science and Engineering, College of Chemistry and Materials Science, Jinan University, Guangzhou, 511443, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|June 5, 2024
概括
一个新的"盐中的Zn2+"间相保护水性电池中的阳极免受降解. 这一策略使得稳定,无树的沉积成为可能,并提高了电池的寿命.
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) 提供高安全性和低成本.
- 金属阳极面临着诸如进化,副作用反应和树生长等挑战,限制了AZIB的性能.
- 开发稳定的阳极对于推进AZIB技术至关重要.
研究的目的:
- 为阳极在水性电解质中开发一种保护性介相.
- 为了提高金属阳极的稳定性和可逆性.
- 为了提高水性离子电池的循环性能.
主要方法:
- 在阳极表面 (ZIS@Zn) 施工"盐中的Zn2+" (ZIS) 间相.
- 利用ZIS介相的疏水性,将阳极与水性电解质分离出来.
- 采用ZIS间相作为一个有序的,无水的离子导体介质,用于沉积.
- 用基 (NVO) 阴极组装对称电池和充满电池,用于性能评估.
主要成果:
- 齐斯介相有效地抑制了进化反应和副作用.
- 在接口上实现了统一的沉积和快速的 Zn 2+ 迁移.
- 对称细胞表现出4500小时的无树涂层/条纹涂层,临界电流密度为14 mA cm-2 .
- 带有ZIS@Zn阳极和NVO阴极的充满电池在1600个循环后保持了88%的容量.
结论:
- ZIS介相为稳定水性电解质中的阳极提供了一种有效的策略.
- 这种方法显著提高了AZIBs的可逆性和长期循环稳定性.
- 无水离子导体ZIS介相是克服水性金属阳极的局限性的关键.
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