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8790220 
Journal Article 
Semiconductor TiO2 ceramic filler for safety-improved composite ionic liquid gel polymer electrolytes 
Pan, X; Hou, Q; Liu, Lei; Zhang, J; An, M; Yang, P 
2021 
Yes 
Ionics
ISSN: 0947-7047
EISSN: 0388-659X 
27 
5 
2045-2051 
WOS:000621013300002 
Gel polymer electrolytes are one of the candidates for solid electrolytes to solve safety issues and improve the energy density of solid-state lithium batteries. Gel polymer electrolyte has high ionic conductivity at room temperature (similar to 10(-3) S cm(-1)), but its mechanical properties are poor. Herein, we prepared a series of composite gel polymer electrolytes by N-methyl-N-propylpiperidinium bis(trifluoromethanesulfonyl)imide, poly(vinylidene fluoride-hexafluoropropylene), LiTFSI, and various inorganic fillers. The addition of 5 wt% TiO2 can not only increase the ionic conductivity of gel polymer electrolytes but also improve the mechanical properties of gel polymer electrolytes. Besides, as a semiconductor, the TiO2 has safety risk when uses in composite gel polymer electrolyte. TiO2-ILGPE safety is investigated by cyclic voltammetry and battery performance. Additionally, TiO2-ILGPE displays a perfect flame-retarding ability, and TiO2 would not be reduced by the lithium metal anode. 
Gel polymer electrolytes; Solid-state lithium metal batteries; Safety issues; Inorganic oxide particles; Mechanical property 
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