Electrical studies on polyvinylidene fluoride-hexafluoropropylene (PVdF-HFP) based polymer electrolytes complexed with litium bis (oxatlato) borate (LiBOB) / Nor Farahah Sapwan

Polymer electrolytes based on poly(vinylidenefluoride)-hexafluoropropylene (PVdF-HFP) complexed with litium bis(oxatlato) borate (LiBOB) have been prepared using direct dissolution technique. The complexation of salt with PVdF-HFP was confirmed by electrical and structural studies. LEs were first prepared by dissolving lithium salt, LiBOB in dimethyl sulfoxide (DMSO) using various molar concentrations of LiBOB. The optimum conductivity (0.8 M) of liquid electrolyte (LE) that measured by electrical impedance spectroscopy (EIS) was gelled with different concentration of PVdF-HFP. The highest conductivity of PGE with 4 wt.% was chosen as it completely been in gel form. The plot of log o versus 1000/T for all systems implies that the systems follow the Arrhenius rule, in which conductivity is thermally assisted. The interaction between components also was studied using ATR-FTIR spectroscopy. Room temperature (28°C) conductivity of 3.99 x 10"3 Scm"1 was observed in DMSO-0.8 M LiBOB-4 wt.% PVdF-HFP polymer system.