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Updated: Sep 14, 2025

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

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Published on: December 20, 2016

大分子基盐使长周期硫电池的密度介面成为可能

Dejie Qu^1,2, Tao Liu^3,2, Youlong Sun²

¹College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.

Advanced materials (Deerfield Beach, Fla.)

|July 21, 2025

概括

一种新的基盐, perfluoropinacolatoborate (LiFPB),可以增强硫 (Li-S) 电池中的固体电解质介相 (SEI). 这项创新提高了循环稳定性和能量密度,用于下一代储能.

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:

硫 (Li-S) 电池提供超越离子技术的高能量密度潜力.
金属阳极和聚硫化物电解质之间的接口反应阻碍了商业可行性.
一个稳定的固体电解质间相 (SEI) 对于长周期Li-S电池至关重要.

研究的目的:

开发一种分子工程方法来加强Li-S电池中的SEI.
引入一种新的基盐, perfluoropinacolatoborate (LiFPB),以提高Li-S电池的性能.
为了实现长周期和高能量密度的Li-S电池.

主要方法:

设计和合成了一种新的基盐,LiFPB,具有特定的阳离子特性.
在电解质中加入LiFPB用于Li-S电池测试.
分析了SEI形成,金属兼容性,库伦比效率和细胞循环性能.

主要成果:

LiFPB离子促进一个强大的SEI,富含LiF和LiB_xO_y物种.
含有LiFPB的电解质实现了高库伦比效率 (99.59%) 和提高了金属的兼容性.
-S细胞表现出增强的容量保留 (50.9%至75.7%超过200个周期),并扩大到Ah级袋细胞,能量密度为408Wh-1kg.

结论:

电解质盐的合理设计,以LiFPB为例,是开发长周期Li-S电池的有效策略.
LiFPB显著减轻了接口问题,为实用的下一代能源存储铺平了道路.
这种分子工程方法为克服当前Li-S电池技术的局限性提供了一个有希望的途径.

关键词:

这种电池是Li-S电池.界面化学界面化学大分子基盐是基于的盐.

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