局部缩的深度乳化液 电解质用于低极化金属电池
Cheng Xu1,2, Thomas Diemant1,2, Xu Liu1,2
1Helmholtz Institute Ulm (HIU), Helmholtzstraße 11, D-89081, Ulm, Germany.
Advanced materials (Deerfield Beach, Fla.)
|February 27, 2024
概括
将1,2-difluorobenzene添加到深度环氧液体电解质中,可以通过降低粘度和增强离子传输来提高金电池的性能,从而延长寿命和更高容量.
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:
- 由于其低成本和无毒性,深液体电解质 (DELEs) 对金属电池 (AMB) 是有前途的.
- 然而,DELE中的高粘度和缓慢的离子传输限制了AMB的性能,导致高细胞极化和低特异容量.
研究的目的:
- 提高DELE的流动性和离子传输,以提高AMB的性能.
- 调查非溶解辅溶剂对DELE及其接口特性的影响.
主要方法:
- 通过使用[AlCl3]1.3[] (AU) 作为模型DELE和1,2-二二 (dFBn) 作为辅溶剂,构建了局部缩的深度欧液体电解质 (LC-DELE).
- 分析了dFBn对电解质粘度,离子运输,固体电解质间相 (SEI) 形成和界面电阻的影响.
主要成果:
- 添加dFBn显著改善了电解质流动性和离子传输,而不会改变离子动力学.
- dFBn修改了阳极上的SEI层,降低了接口电阻和细胞极化.
- 艾尔/艾尔细胞的寿命提高 (210到2000小时),极化减少 (0.36到0.14V在1.0mA cm-2).
- 阿尔石墨细胞表现出增强的速度性能与减少的极化.
- 硫电池的初始放电容量显著增加 (94到1640mAhg-1).
结论:
- 1,2-difluorobenzene有效地解决了使用DELE的AMB中的高极化问题.
- 这种方法为开发高性能,低成本的金属电池提供了新的途径.
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