对离子-溶剂相互作用的洞察力,以促进以太基电解质在纯SiOx和LithiNi0.8 Mn0.1 Co0.1 O2全细胞中稳定的运行
Yi-Fan Tian1,2, Shuang-Jie Tan1, Zhuo-Ya Lu1,2
1CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), 100190, Beijing, P. R. China.
Angewandte Chemie (International ed. in English)
|June 20, 2023
概括
研究人员为高能离子电池增强了以太基电解质. 通过优化离子-溶剂相互作用,他们实现了500个周期的稳定循环,提高了电池性能和安全性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 以太溶剂为离子电池阳极提供良好的还原稳定性,但在高压操作中具有有限的氧化稳定性.
- 提高以太电解质的电化学稳定性对于开发高能量密度的离子电池至关重要.
研究的目的:
- 通过专注于离子-溶剂相互作用,优化以太基电解质的阳极稳定性.
- 开发一种稳定的以太电解质,用于使用氧化阳极和高阴极的高能量密度离子电池.
主要方法:
- 通过使用酸 (LiNO3) 和四二极 (THF) 来研究离子-溶剂相互作用,具有高二极矩与介电常数的比率.
- 在一个包含纯氧化 (SiOx) 阳极和,,,氧化 (LiNi0.8Mn0.1Co0.1O2) 阴极的完整电池中评估了电解质的性能.
- 分析了电极表面上优化界相层的形成.
主要成果:
- 实现了强化的离子-溶剂相互作用,增强了电解质的氧化稳定性.
- 在SiOx阳极和LiNi0.8Mn0.1Co0.1O2阴极上形成了一个优化的介相.
- 设计的电解质在SiOx用LiNi0.8Mn0.1Co0.1O2全细胞中显示了超过500个周期的稳定循环性能.
结论:
- 定制阳离子-溶剂相互作用是设计稳定的以太基电解质的有效策略.
- 开发的电解质显示出在高能量密度的离子电池中实际应用的巨大潜力.
- 这项研究通过调节物种间相互作用,为电解质设计提供了洞察力.
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