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类型的电动双层与键互锁到稳定的金属阳极
Tong Yan1, Boyong Wu1, Sucheng Liu1
1School of Chemistry and Chemical Engineering, Guangdong Provincial Key Laboratory of Fuel Cell Technology, South China University of Technology, Guangzhou, 510641, China.
Angewandte Chemie (International ed. in English)
|August 15, 2024
概括
将2.2'-硫乙醇 (SDE) 引入水性电池,通过创建选电双层 (EDL) 来防止副作用和树生长. 这种添加剂增强了电池的稳定性和寿命.
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:
- 水性金属电池面临稳定性挑战,原因是阳极接口的副作用反应和树突增长.
- 水和硫酸盐离子是这些有害界面现象的关键贡献者.
研究的目的:
- 通过减轻副作用和树突形成,提高水性金属电池的稳定性.
- 引入一种新型的添加剂,2,2'-硫乙醇 (SDE),用于在阳极上构建保护电双层 (EDL).
主要方法:
- 在水性硫酸电解质中添加2,2′-硫乙醇 (SDE).
- 通过键相互作用形成一个选型EDL.
- 对界面离子动态和沉积行为的分析.
主要成果:
- 在阳极接口上,SDE有效地取代和捕获水和硫酸盐离子,减少它们的有害影响.
- 该添加剂促进了无树的沉积,并增强了Zn2+离子的转移数.
- Zn//Zn对称细胞的稳定性超过3500小时,Zn//MnO2全细胞的稳定性超过2500个周期.
结论:
- 开发的SDE改性电解质显著提高了水性金属电池的循环稳定性和寿命.
- SDE充当多功能添加剂,产生一种保护性EDL,抑制接口副作用,促进均涂层.
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