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Physicochemical studies of PVdF–HFP-based polymer–ionic liquid composite electrolytes

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Polymer–ionic liquid composite electrolytes based on poly (vinylidenefluoride-co-hexafluoropropylene) (PVdF–HFP) and room temperature ionic liquid: 2,3-dimethyl-1-octylimidazolium hexafluorophosphate (DMOImPF6) have been synthesized and studied. The addition of dimethylacetamide (DMA) and propylene carbonate (PC), both with high dielectric constant and low viscosity, to polymer electrolytes has been found to result in an enhancement of conductivity by one order of magnitude. Composite polymer electrolytes containing ionic liquid have been found to be thermally stable upto 300°C. Motional narrowing observed in the variation of line width of 1H and 19F NMR peaks with temperature suggests that both cations and anions are mobile in these electrolytes.

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Lalia, B.S., Yamada, K., Hundal, M.S. et al. Physicochemical studies of PVdF–HFP-based polymer–ionic liquid composite electrolytes. Appl. Phys. A 96, 661–670 (2009). https://doi.org/10.1007/s00339-009-5129-y

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