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液体电解质的各种现场聚合物的效率以及对近固态电池的实际影响

Peiying Li¹, Shuya Wang¹, Jinjin Hao¹

¹State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.

Angewandte Chemie (International ed. in English)

|August 9, 2023

概括

研究固态电池的现场聚合,发现环开聚合能产生高转换率,但电导率差. 双键基聚合提供了更好的导电性,以VEC为基础的共聚合物显示出优越的性能和稳定性.

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:

在现场聚合是固态电池的关键,但面临着影响性能的挑战.
了解聚合条件对于优化固态电解质至关重要.

研究的目的:

为了比较环开聚合 (ROP) 和双键基聚合 (DBRP) 在现场电解质合成.
评估由此产生的聚合物的单体转化,Li+导电性和界面稳定性.
确定高性能固态电池的最佳聚合策略.

主要方法:

研究了用于液体电解质现场聚合的ROP和DBRP.
分析了不同聚合方法的单体转化率.
用高压阴极和金属阳极测量Li+导电性和评估界面稳定性.

主要成果:

ROP实现了高的单体转化 (~90%),但导致了低的Li+导电性 (<2×10^-5 S cm^-1) 和较差的阴极稳定性.
DBRP显示了较低的单体转化 (50-80%) 但更高的Li+导电性 (~2×10^-4 S cm^-1).
来自DBRP的基于VEC的含共聚合物通过LiF被动化层显示出出色的Li+导电性,抗氧化能力和对Li-金属阳极的稳定性.

结论:

与ROP相比,DBRP在固态电解质中实现高Li+导电性更有希望.
基于VEC的共聚物为稳定,高压准固态电池提供了可行的途径.
优化聚合和材料设计对于推进固态电池技术至关重要.

关键词:

双键的激进聚合方式是双键.在现场固化固化.接口接口接口接口环开放的聚合方式固态电池固态电池是什么

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