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微乳液工程调和烯碳酸盐电解质和石墨阳极用于全气候离子电池

Zezhuo Li¹, Xueting Hu¹, Haijin Ji¹

¹State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.

Angewandte Chemie (International ed. in English)

|November 13, 2025

概括

这项研究引入了使用GMS@THF微粒的碳酸 (PC) 微乳液电解质,以防止离子电池中的石墨阳极脱皮. 这一创新使得电池在任何气候条件下都能保持稳定的性能,并且可以长期循环使用.

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:

基于碳酸 (PC) 的电解质为所有气候离子电池提供了广泛的液体范围.
由于Li+-PC联合插曲而导致的石墨 (Gr) 阳极脱皮是PC电解质应用的一个主要障碍.
目前的溶解调节方法面临复杂的界面化学限制,阻碍了长期循环.

研究的目的:

设计基于PC的微乳液电解质,以提高PC电解质和石墨阳极之间的兼容性.
为了抑制有害的Li+-PC协同插曲和石墨阳极脱皮.
为了在离子电池中实现稳定且持久的全气候性能.

主要方法:

一种微乳液电解质是通过将甘单酸 (GMS) 和四水 (THF) 引入PC电解质来制备的.
GMS与THF自组装,形成GMS@THF微粒,产生液体-液体界面张力.
微乳液结构的设计是为了将微粒引导到电极接口,修改接口化学.

主要成果:

在石墨阳极接口上的GMS@THF微粒形成了PC贫+溶解层,有效地阻断了自由PC并抑制了协同插曲.
基基Gr细胞表现出92.8%的高初始库伦比效率.
1Ah的GradusLiFePO4袋式电池实现了4000多个循环,在极端温度 (-40至100°C循环, -60至100°C运行) 中具有出色的性能.

结论:

基于PC的电解质的微乳液工程为界面操纵提供了一个有效的策略.
开发的电解质使离子电池能够稳定地运行石墨阳极,并且在任何气候条件下都具有优异的性能.
这种方法为PC/Gr系统中优化电解质/电极接口相提供了一个通用范式.

关键词:

适用于所有气候的离子电池.糖单乙酸盐的使用方法石墨阳极是一种石墨阳极.微乳液电解质是微乳液的电解质.乙烯碳酸盐是什么?

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