Abstract
A cationic networked polymer solid electrolyte (Met-IL/EGDMA/LiTFSI) synthesized by copolymerization of 1-(2-methacryloyl)ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (Met-IL) and ethylene glycol dimethacrylate (EGDMA) in the presence of lithium bis(trifluromethanesulfonyl)imide (LiTFSI) showed higher ionic conductivity (1.0 × 10−2 S/m) than the corresponding non-ionic networked polymer solid electrolyte (MMA/EGDMA/LiTFSI) (<1.0 × 10−3 S/m) prepared by copolymerization of methyl methacrylate (MMA) and EGDMA in the presence of LiTFSI. A gel polymer electrolyte composed of the cationic networked polymer Met-IL/EGDMA and propylene carbonate (PC) solution of LiTFSI prepared by copolymerization of Met-IL and EGDMA in a PC solution of LiTFSI showed much higher ionic conductivity (3.0 × 10−1 S/m) than the solid polymer electrolyte.
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