材料科学
电解质
离子电导率
聚合物
化学工程
锂(药物)
快离子导体
枝晶(数学)
环氧乙烷
无定形固体
复合材料
纳米技术
电极
有机化学
物理化学
内分泌学
化学
几何学
工程类
医学
数学
共聚物
作者
Hanwen An,Qingsong Liu,Jiale An,Shuaitong Liang,Xufeng Wang,Zhiwei Xu,Yujin Tong,Hua Huo,Nan Sun,Yinglin Wang,Yifan Shi,Jiajun Wang
标识
DOI:10.1016/j.ensm.2021.09.019
摘要
The urgent demand for high security and high energy density all-solid-state batteries has generated a strong interest in polyethylene oxide (PEO)-based solid polymer electrolyte (SPE). However, devising a SPE with a high ionic conductivity without sacrificing mechanical properties remains a critical challenge. Herein, an interpenetrating polymer network electrolyte is designed by chemical grafting coupling, where 2D boron nitride nanosheets and poly(ethylene glycol)diacrylate were coupled by a silane coupling agent. A considerable intensification of mechanical strength has been achieved for the SPE via the graft-coupling strategy, and the interpenetrating network with BNNs leads to the generation of amorphous regions for fast Li-ion immigration. The electrolyte integrates high mechanical strength with enhanced room-temperature ionic conductivity, enabling a long-cycle stability dendrite-free Li||Li symmetrical cell, and prominent cyclic performance is demonstrated in full cells at room temperature. Our approach provides a broader promise for the practical applications of solid-state batteries.
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