A study on the blending effect of PVDF in the ionic transport mechanism of plasticized PVC–LiBF4 polymer electrolyte

The hybrid plasticized polymer electrolyte composed of the blend of polyvinyl chloride (PVC) and poly vinylidene fluoride (PVdF) as a host polymer, the mixture of ethylene carbonate (EC) and propylene carbonate (PC) as a plasticizer and LiBF4 as a salt was studied. An attempt was made to investigate the effect of PVdF in the plasticized PVC + LiBF4 system in three blend ratios. The FTIR and DSC studies confirm the formation of polymer–salt complex and miscibility of the PVC and PVdF. The XRD results of plasticized PVC (S1, S2, S3) and PVdF blended (S4, S5, S6) were compared that increase in PVC concentration increases the degree of crystallinity (S1 < S2 < S3) and the blending of PVdF further increases the crystallinity (S4 < S5 < S5), which were confirmed in ionic conductivity measurements. The surface morphology of the films was also studied by Scanning Electron Microscope, which parallels the same.