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Gel Polymer Electrolytes Based on Polymerizable Lithium Salt and Poly(ethylene glycol) for Lithium Battery Applications
- Baik, Ji-Hoon, Kim, Sangwan, Hong, Dong Gi, Lee, Jong-Chan
- ACS applied materials & interfaces 2019 v.11 no.33 pp. 29718-29724
- carbonates, crosslinking, electrolytes, gels, liquids, lithium, lithium batteries, methyl ethers, moieties, polyethylene glycol, propylene
- Here, a polymerizable lithium salt, lithium (trifluoromethanesulfonyl)(vinylsulfonyl)imide, was synthesized and used to prepare cross-linked gel polymer electrolyte systems with poly(ethylene glycol) methyl ether methacrylate as an ion-conducting moiety, poly(ethylene glycol) dimethacrylate as a cross-linker, and propylene carbonate as a liquid electrolyte without adding any conventional inorganic lithium salt. The gel polymer electrolytes prepared in this study exhibited a reasonably high ionic conductivity (6.7 × 10–⁴ S cm–¹ at 25 °C and 1.8 × 10–³ S cm–¹ at 60 °C) and lithium-ion transference number (0.52), and the lithium battery prepared using the gel polymer electrolyte showed a stable cycling performance over 50 cycles.