Impact of Zirconium Oxide Nanopowder on Dielectric Response and Morphological Studies of Magnesium-Based PVDF-HFP/PMMA Nanocomposite Polymer Electrolyte Systems

55 wt% PVDF-Co-HFP:15 wt% PMMA:30 wt% Mg(CF₃SO₃)₂ nanocomposite polymer electrolytes have been prepared and examined the synergistic effect of different concentrations of nanofiller in the present work. The structural and morphological properties of these films are studied by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and differential scanning calorimetry (DSC). Electronic impedance spectroscopy examines their electrical and electrochemical properties, such as dielectric behavior, electric modulus, tangent loss, and relaxation time. Although the structural investigation shows that PVdF-co-HFP is semi-crystalline, adding nanofiller ZrO2 makes it more amorphous. The impedance comparisons show that the nanofiller increases the ionic conductivity of the electrolyte film to its maximum value (0.343 × 10⁻³S cm⁻¹) is observed for 8 wt% of ZrO₂ at room temperature. The degeneration of the film is seen with each additional addition of filler. Thus, among the films, 8% of the ZrO₂ sample is considered the ideal composition. The ion transference numbers of different films are ascertained using DC Wagner’s polarization method.