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Chloride Ion Conducting Polymer Electrolytes Based on Cross- linked PMMA-PP14Cl-PP14TFSI Ion Gels for Chloride Ion Batteries

Chloride ion conducting polymer electrolytes based on cross-linked ion gels for chloride ion batteries were prepared by in-situ photo induced copolymerization of methyl methacrylate (MMA) and ethylene glycol dimethacrylate cross-linker (EGDMA) in the presence of ionic liquid mixture, 0.5 M 1-butyl-1-methylpiperidinium chloride (PP 14 Cl) in 1-butyl-1-methylpiperidinium bis-(trifluoromethylsulfonyl)imide (PP 14 TFSI). The as-prepared ion gel membranes with 80 wt% chloride containing ionic liquid mixture are self-standing, flexible and transparent with superior thermal (up to about 340 ºC) and electrochemical stability (5.0 V vs. SS/SS). The ionic conductivity of chloride ion conducting IL-based gel polymer electrolytes (IL-GPEs) reached 0.9×10 -4 S cm -1 with 80 wt% ionic liquid mixture at 25 ºC. Preliminary charge and discharge testing has demonstrated the feasibility of using chloride ion conducting IL-GPEs for chloride ion batteries.