材料科学
电解质
硼氢化
聚合物
化学工程
镁
有机化学
复合材料
电极
冶金
催化作用
工程类
物理化学
化学
作者
Aobing Du,Huanrui Zhang,Zhonghua Zhang,Jingwen Zhao,Zili Cui,Yimin Zhao,Shanmu Dong,Longlong Wang,Xinhong Zhou
标识
DOI:10.1002/adma.201805930
摘要
Abstract A polymer‐based magnesium (Mg) electrolyte is vital for boosting the development of high‐safety and flexible Mg batteries by virtue of its enormous advantages, such as significantly improved safety, potentially high energy density, ease of fabrication, and structural flexibility. Herein, a novel polytetrahydrofuran‐borate‐based gel polymer electrolyte coupling with glass fiber is synthesized via an in situ crosslinking reaction of magnesium borohydride [Mg(BH 4 ) 2 ] and hydroxyl‐terminated polytetrahydrofuran. This gel polymer electrolyte exhibits reversible Mg plating/stripping performance, high Mg‐ion conductivity, and remarkable Mg‐ion transfer number. The Mo 6 S 8 /Mg batteries assembled with this gel polymer electrolyte not only work well at wide temperature range (−20 to 60 °C) but also display unprecedented improvements in safety issues without suffering from internal short‐circuit failure even after a cutting test. This in situ crosslinking approach toward exploiting the Mg‐polymer electrolyte provides a promising strategy for achieving large‐scale application of Mg‐metal batteries.
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