西兰与Ce2(SO4)3合作,有效地构建一个保护层,并诱导 Zn2+的均沉积,以获得超稳定的 Zn 阳极
Luyan Yu1, Sidan He1, Baohua Liu1
1School of Chemistry and Materials Science, Jiangsu Normal University Xuzhou Jiangsu 221116 P. R. China wangc@jsnu.edu.cn wangqh@jsnu.edu.cn.
Chemical science
|April 11, 2025
概括
这项研究通过使用双电解质添加剂来增强水性离子电池 (ZIB),以防止树的生长和阳极上的副作用反应,改善电池寿命和稳定性.
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 (ZIB) 提供安全,可持续和经济高效的大规模能源存储.
- 然而,由水引起的副作用和树的生长限制了它们的性能和寿命.
研究的目的:
- 为水性ZIBs开发一个稳定的阳极.
- 通过电解质修饰来提高ZIB的循环稳定性和安全性.
主要方法:
- 使用3-aminopropyltrimethoxysilane (KH-540) 作为电解质添加剂,形成一个保护性的有机-无机固体-电解质接口 (SEI) 层.
- 引入三硫酸盐 (Ce2SO4) 3以减轻"尖端效应"并促进均的沉积.
- 研究了双添加剂对阳极性能的协同作用.
主要成果:
- 双添加剂有效地抑制了副作用,并抑制了阳极上的树生长.
- 实现了均的沉积,显著提高了阳极的循环稳定性.
- 展示了一种具有5000小时循环寿命的Zn‖Zn对称电池,在1.0 mA cm−2时,接近100%的库伦比效率,以及1.0 mA h cm−2的面积容量.
- 完整的Zn‖V2O5细胞在1000个循环后保持了188.35 mA hg-1的高特异容量.
结论:
- 结合使用KH-540和Ce2(SO4) 3可以创建一个强大的SEI层,并屏蔽阳极表面,从而达到优越的阳极性能.
- 这一策略显著提高了水性ZIB的循环寿命和库伦比克效率,为实际应用铺平了道路.
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