深度环氧化溶剂结合剂促进硫电池的反应动力学
Chen Li1, Zhaokun Wang1, Zuohang Li1
1School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China.
Angewandte Chemie (International ed. in English)
|August 7, 2025
概括
一种使用微波辐射合成的新型深溶解剂 (DES) 粘合剂,通过抑制聚硫化物穿和改善Li+传输来提高硫 (Li-S) 电池性能. 这种粘合剂提供了稳定的循环与显著的容量保留.
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:
- 硫 (Li-S) 电池的现有结合剂在处理聚硫化物转运,缓慢的动力学,电极体积变化,缓慢的Li+转移和易燃性方面存在局限性.
- 这些挑战阻碍了Li-S电池的实际应用和长期稳定性.
研究的目的:
- 为Li-S电池开发一种新的粘合剂,集成多种功能,克服现有的局限性.
- 为了研究深度欧阳性溶剂 (DES) 粘合剂在提高电化学性能和稳定性方面的有效性.
主要方法:
- 基于酸和贝他因 (CB) 的DES结合剂通过微波辐射迅速合成.
- 使用拉曼光谱和动态机械分析对键动态的描述.
- 通过理论计算和现场拉曼测量评估Li+流量改善和聚硫化物吸附.
- 通过DRT分析和电池循环试验评估Li2S核化/溶解和电化学性能.
主要成果:
- 由于分子内和分子间的键,CB DES粘合剂表现出强大的粘附性,自我愈合性和阻燃性.
- 直接改善Li+流量和显著促进氧化还原动力学,有效抑制聚硫化物穿效应.
- 增强LiPS吸附和快速LiPS转化,通过各种分析技术得到证实.
- 在5C时,Li-S电池的循环性能稳定,在300个循环后保持61.3%的容量.
结论:
- 开发的CB DES绑定器有效地解决了Li-S电池技术的关键挑战.
- 德斯结合剂的独特特性,特别是它的结网,导致了优越的电化学性能和稳定性.
- 这项工作为设计高性能能量存储设备的先进粘合剂提供了一个有前途的策略.
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