期刊
BATTERIES & SUPERCAPS
卷 5, 期 2, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/batt.202100319
关键词
energy density; lithium batteries; ionic conductivity; room temperature; solid-state electrolyte
资金
- National Natural Science Foundation of China [22003017]
- Natural Science Foundation of Guangdong Province [2020A1515011506]
- Recruitment Program of Guangdong [2016ZT06C322]
- China Scholarship Council [201903170199]
A novel solid-state electrolyte with ultrathin and robust crosslinked polymer-brush architecture is reported, exhibiting high ionic conductivity at room temperature and enhanced mechanical strength, thermal stability, and fire resistance. The electrolyte shows stable lithium electrodeposition and excellent electrochemical performance in Li/LiFePO4 cells at 30 degrees C, providing a promising pathway for next-generation safe and high-energy lithium metal batteries.
Electric vehicles, intelligent machines, and portable electronics in our daily lives are placing insatiable demand on safe and powerful battery materials that can function at room temperature. Herein, we report an ultrathin and robust solid-state electrolyte with crosslinked polymer-brush architecture. On one hand, the highly mobile polymer brushes with a moderate side chain length enable efficient cation solvation and fast ion transport, offering room-temperature ionic conductivity as high as 0.23 mS cm(-1). On the other hand, incorporation of the inorganic core crosslinker endows the material with enhanced mechanical strength, thermal stability, and fire resistance. As a result, the crosslinked polymer-brush electrolyte films demonstrate stable lithium electrodeposition and great electrochemical performance in Li/LiFePO4 cells at 30 degrees C, providing a promising pathway to next-generation safe and high-energy lithium metal batteries.
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