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多场合驱动在COF功能化膜的现场接口生长,用于硫电池

Yun-Chen Ge^1,2, Rui-Xiang Wang¹, Xue-Chun Huang¹

¹Institute of New Energy and Low-Carbon Technology (INELT), School of Chemical Engineering, Sichuan University, Chengdu, Sichuan, 610000, P.R. China.

Angewandte Chemie (International ed. in English)

|November 3, 2025

概括

研究人员使用油-水-油系统开发了一种基于COF的新型分离器,用于-硫 (Li-S) 电池. 这种可扩展的方法增强了Li+运输,并限制了聚硫化物穿,提高了电池性能.

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
纳米技术纳米技术

背景情况:

对于高性能硫 (Li-S) 电池来说,分离器的修改至关重要.
传统方法在实现分离器上均和强大的功能性材料粘附方面面临挑战.
为先进的Li-S电池分离器开发可扩展和有效的策略至关重要.

研究的目的:

开发一个可扩展的自上而下的策略,为Li-S电池创建一个独立的COF功能化的分离器.
通过界面聚合来改善Li+运输和抑制多硫化物穿.
为了提高Li-S电池的整体电化学性能.

主要方法:

采用可扩展的自上而下的策略,利用油-水-油系统进行COF纳米颗粒的界面聚合.
在多烯基基基板上的现场聚合,形成一个统一而坚固的COF架构.
以其结构性,化学性和电化学性质来表征COF功能化的膜.

主要成果:

实现了具有丰富的 -OH 组的均和坚固的COF功能化膜.
证明了高离子导电率 (0.92 mS cm-1) 和高的聚硫化物扩散屏障 (0.390vs0.283 eV).
在1.0°C的500个循环后,表现出卓越的电化学性能,678mAhg-1在1.0°C下进行500个循环后.

结论:

在现场接口聚合策略为Li-S电池中基于COF的膜功能提供了一个新的途径.
开发的COF功能分离器通过促进Li+运输和限制聚硫化物穿,显著提高了Li-S电池的性能.
这种可扩展的方法为制造高性能Li-S电池组件提供了有希望的方法.

关键词:

共价有机框架 (COFs) 是一种共价有机框架.功能化的膜.在现场的接口增长.硫电池的使用方法多场合的多场合

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