期刊
ADVANCED MATERIALS
卷 31, 期 11, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201805930
关键词
borates; in situ crosslinking reaction; magnesium batteries; polymer electrolytes; polytetrahydrofuran
类别
资金
- National Natural Science Foundation for Distinguished Young Scholars of China [51625204]
- National Key R&D Program of China [2018YFB0104300]
- Programs of the National Natural Science Foundation of China [21601195]
- Qingdao Science and Technology Program [17-1-1-30-jch]
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 polytetrahydrofuranborate-based gel polymer electrolyte coupling with glass fiber is synthesized via an in situ crosslinking reaction of magnesium borohydride [Mg(BH4)(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 Mo6S8/Mg batteries assembled with this gel polymer electrolyte not only work well at wide temperature range (-20 to 60 degrees 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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