Ion Pair Integrated Organic‐Inorganic Hybrid Electrolyte Network for Solid‐State Lithium Ion Batteries
Ion Pair Integrated Organic‐Inorganic Hybrid Electrolyte Network for Solid‐State Lithium Ion Batteries
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DOI：
10.1002/ente.201800431
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发表时间：
2018-11
影响因子：
3.8
通讯作者：
Guang Yang;Baoyan Fan;Feihua Liu;Fangzhou Yao;Qing Wang
中科院分区：
文献类型：
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作者：
Guang Yang;Baoyan Fan;Feihua Liu;Fangzhou Yao;Qing Wang
用咪唑基离子液体接枝低聚八硅氧烷交联制备了一类具有离子对集成网络的有机-无机杂化电解质（X - POSS - IL - LiTFSI），用于固态锂离子电池。X - POSS - IL - LiTFSI是一种热稳定且高度非晶化的材料，具有高离子电导率和优异的电化学稳定性。通过进一步固定一小部分离子液体，X - POSS - IL - LiTFSI的离子电导率得到了显著提高。在室温下1.4×10−4S/cm，达到实际电池应用所需的水平，同时保持尺寸完整性。采用塑化X - POSS - IL - LiTFSI电解质的锂电池硬币电池在环境和高温下均表现出较高的比容量。
A class of organic‐inorganic hybrid electrolyte with ion pair integrated network (X‐POSS‐IL‐LiTFSI) has been prepared by crosslinking of oligomeric octasilsesquioxanes grafted with imidazolium‐based ionic liquids for solid state lithium ion battery applications. X‐POSS‐IL‐LiTFSI is thermally stable and highly amorphous, and shows high ionic conductivities and excellent electrochemical stability. With further immobilization of a small fraction of ionic liquid, the ionic conductivity of X‐POSS‐IL‐LiTFSI has been significantly improved, e. g. 1.4×10−4S/cm at ambinet temperature, to the level required by the practical battery applications, while maintaining the demensional integity. The coin cells of lithium batteries with the plasticized X‐POSS‐IL‐LiTFSI electrolytes exhibit high specific capacities at both ambient and elevated temperatures.