解聚
电解质
聚合物
材料科学
环氧乙烷
锂(药物)
化学工程
催化作用
聚合物电解质
化学
高分子化学
有机化学
电极
离子电导率
共聚物
复合材料
物理化学
内分泌学
工程类
医学
作者
Wei Li,Le Ma,Sisi Liu,Xiaolei Li,Jian Gao,Shu‐Meng Hao,Weidong Zhou
标识
DOI:10.1002/anie.202209169
摘要
Solid polymer electrolytes (SPEs) with LiTFSI (lithium bis(trifluoromethane sulfonimide)) are promising candidates for solid-state batteries, owing to their good interfacial contact with solid electrodes. Here, three copolymerized polyethers were prepared as SPEs, using the catalysts of SnF2 or SnF2 -LiPF6 . The thermal depolymerization of these polyethers was observed at elevated temperatures, which limits their operating temperature ranges. Once the catalyst is removed, the thermal degradation temperatures of these SPEs are raised by 30-55 °C, together with improved thermal performance in cells. For SPEs, the high price of LiTFSI is an obstacle for their large-scale application, and it's recycling is hindered by the strong interaction with polymers. By the thermal depolymerization of polyethers, LiTFSI can be easier reclaimed from above mentioned SPEs and even the commercial PEO(poly(ethylene-oxide)) based SPE in rates of 70-80 %, providing a low-cost strategy for the recycling of LiTFSI.
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