PVDF-HFP based nanocomposite polymer electrolytes for energy storage devices dispersed with various nano-fillers

Different composition of nanocomposite polymer electrolyte (NCPE) films, consisting of Polyvinylideneflouride-co-hexaflouropropylene (PVDF-HFP) as a host, Magnesium chloride (MgCl2) as a ionic salt and various concentrations of nanosized ceramic fillers -TiO2, MgO, ZnO and Al2O3, have been successfully synthesized using solution casting method. The best bulk conductivity (σ) achieved at room temperature for optimum conducting composition (OCC) of solid polymer electrolyte is 4.69x10−7 S/cm-phase-Ist. Further on addition of filler -phase IInd, conductivity increased and achieved highest value for composition i.e. PVDF-HFP: MgCl2: ZnO (70:30:3) of NCPE is 1.25x10-5 S/cm and from temperature dependence study we got highest σ for OCC of NCPE at 110 °C is 1.24x10−4 S/cm. The electrical measurement for all samples have been carried out in frequency range 42Hz -5MHz and temperature range of 30 -110 °C by Impedance Spectroscopy. X-ray Diffraction (XRD) have been carried out to characterize structural properties of these NCPE films. The ion transport number tion ∼0.99 for OCC of NCPE system obtained by Wagner’s dc polarization technique.