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快速合成的单离子导电水凝电解质,用于高性能准固态离子电池

Tianyu Qiu¹, Tonghui Wang², Wensi Tang¹

¹Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Northeast Normal University, Changchun, 130024, China.

Angewandte Chemie (International ed. in English)

|September 20, 2023

概括

研究人员使用修饰的共价有机框架 (COFs) 开发了一种新型的对光敏感的水凝电解质. 这种单离子导体为高性能准固态离子电池提供了增强的导电性和稳定性.

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
聚合物化学聚合物化学

背景情况:

单离子导电电解质对于先进的电池至关重要,但由于强烈的阴离子受体相互作用,通常面临低离子导电性挑战.
开发具有高离子导电性,良好的机械性能和稳定性的电解质对于高效的能量储存至关重要.

研究的目的:

为了设计一个超快的光响应共价有机框架 (COF) 基于水凝电解质,增强单离子导电性.
研究这种新型电解质在准固态离子电池中的性能和性能.

主要方法:

用硫酸基组修改COF,以作为烯胺聚合起始剂.
制造基于COF的水凝电解质 (TCOF-S-Gel),利用溶解效应来减少阴离子受体相互作用.
电解质的离子导电性,Zn2+转移数,保持水分和机械性能的表征.
组装和测试一个Zn 电池的 COF-S-Gel 电池的 MnO2 完全离子电池.

主要成果:

该TCOF-S-Gel电解质实现了27.2mS/cm的离子导电率和0.89.8的Zn2+转移数.
水凝电解质表现出良好的保留水和优良的机械性能,由于结合.
组装的离子电池在1°C时显示出248 mAh/g的高放电容量,在10°C时保持90 mAh/g.
准固态离子电池的超级循环性能被观察到.

结论:

开发的瞬间光固化的TCOF-S-Gel电解质克服了传统单离子导体的局限性.
这种新型电解质适用于大型,灵活,高性能准固态离子电池.
该研究强调了改性COF在制造先进电池电解质方面的潜力.

关键词:

协价有机框架协价有机框架摄影修复 (photocuring) 是一种修复方法.准固体电解质准固体电解质单离子导体单离子导体离子电池的使用情况

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