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通过非化溶剂进行电解质工程,用于高性能金属电池

Dequan Huang¹, Yi Liang¹, Tao Wei¹

¹College of Automotive Engineering, Guilin University of Aerospace Technology, Guilin 541004 Guangxi, China.

Journal of colloid and interface science

|March 15, 2025

概括

工程素电解质通过提高氧化稳定性和抑制树的生长来提高金属电池的性能. 这种分子设计推进了高能量密度电池技术.

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
化学工程是化学工程的重要组成部分.

背景情况:

金属电池 (LMB) 提供高能量密度,但面临着像状物生长和电解质不稳定等挑战.
基于1,2-二次氧乙 (DME) 的传统电解质具有有限的氧化稳定性,阻碍了高压阴极的兼容性.

研究的目的:

为高压LMB设计一种基于西洛的新型电解质系统,具有增强的氧化稳定性和改进的界面特性.
通过先进的表征和模拟技术,研究电解质性能背后的分子机制.

主要方法:

溶剂分子工程,以制造具有强大的Si-O键的基于西洛的电解质.
在操作中的拉曼光谱,用于研究电解质在电池运行期间的行为.
分子动力学模拟以分析离子协调和溶解结构.
电化学测试Li的基和Li的基LiNi0.8Co0.1Mn0.1O2电池,以评估性能.

主要成果:

与DME中的C-O键相比,西洛电解质由于高Si-O键能量而表现出优越的氧化稳定性.
在西洛电解质中,增强的Li+与FSI-离子的协调促进了稳定,富含无机物的固体电解质间相 (SEI) 的形成.
优化电解质 (DMS-3) 显示出极好的循环稳定性 (例如,在0.5 mA cm-2下1000个循环中99.4%的CE) 和在完整细胞中保持高容量 (92.26%在110个循环后).

结论:

基于西洛的电解质代表了开发稳定和高性能高压LMB的有希望的战略.
电解质的分子设计,专注于溶剂结构和离子协调,对于克服LMB技术的关键挑战至关重要.
这项工作为电解质工程提供了一个新的范式,为下一代储能系统铺平了道路.

关键词:

电解质溶剂是一种电解质溶剂.高电压高压电源是什么金属电池金属电池的使用方法 Siloxanes 是一个 Siloxanes 是一个 Siloxanes.固体-电解质相间阶段

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