Synthesis and Electrical Properties of Anhydrous GdCl3 Doped PVA Polymer Electrolyte Films

GdCl3 doped PVA polymer electrolyte films were prepared using solvent casting method. XRD pattern confirms the increase in amorphous phase of PVA with the GdCl3. UV-Vis optical absorption spectra reveal the decrease in absorption coefficient, direct band gap energy and indirect band energy with increasing of GdCl3 content. The dielectric constant at low frequency side increases with increase in GdCl3 salt and temperature due to the space charge polarization. The AC conductivity plot obeys the Jonscher power law and the maximum ac conductivity is found to be 2.06×10-4 S/cm. The complex impedance plot show a depressed semicircular arc and the maximum ionic conductivity is found to be 6.12×10-5 S/cm for 15 mol% GdCl3 doped PVA. The electric modulus plots show the non-Debye type relaxation of the samples. The present report strongly recommends the GdCl3 doped PVA polymer electrolyte film as the worthy candidate for the electrochemical device fabrication.