10 to 95 mol dissociable salts are added in quantities rangeing from 2 to 50 mol and the plactisizer is added in quantities ranging from 10 to 90 mol the invention will now be described in greater detail with reference to the following non limiting examples to a reaction vessel were charged 10 ml of socl 2 and 35 ml of poly ethylene glycol peg molecular weight 400 the mixture was refluxed under dry nitrogen flow for 4 days to convert the terminal hydroxy groups to chloride ft ir and nmr were used to monitor the reaction to ensure the completion of the conversion after all the hydroxy groups had been converted to chloride the mixture was vacuum dried for 48 hours and a polyether with terminal groups chlorinated pec was obtained the resulting compound was stored in a desiccator poly vinylidene fluoride pvdf pec and libf 4 were mixed according to the molar ratio as indicated in table 1 dissolved in n n dimethylacetamide dma and stirred for 48 hours at 80 u00b0 c the resulting solution was then coated on a glass plate after removing solvent in a vacuum oven at 130 u00b0 c for 24 hours the resultant film was further dried at room temperature with dry air the obtained polymeric electrolyte film was stored in a desiccator for testing the ionic conductivities were measured by using a du pont dielectric analyzer model 2970 under dry nitrogen having a flow rate of 500 c c min at a heating rate of 3 u00b0 c min and a frequency of 300 000.