This study reports the solid polymer electrolyte films of hydroxypropyl methylcellulose (HPMC) doped with different sodium bromide (NaBr) salt concentrations. The test samples were prepared using the solution cast method, and their structural characterization was done using XRD, SEM, and FTIR. Sharp crystalline peaks of pure NaBr salt disappeared completely in all the HPMC:NaBr polymer electrolyte systems revealing the reduced crystallinity, which greatly influences the dielectric and conductivity of the polymer electrolytes. Fourier transform infrared spectral (FTIR) reports subjected to vibrational changes that appeared due to the result of dopant salt in the host polymer. The samples were analyzed using a pc-based impedance analyzer (Wayne Kerr 6510B) in the frequency scale of 50 Hz to 1 MHz. As the frequency increases, the constant dielectric declines, and the AC electrical conductivity rises. The AC conductivity curves in the high-frequency area follow the Jonscher Power Law. The electrolyte's non-Debye behavior was supported by its relaxation time and dielectric property. According to the reported polymer electrolyte systems, the distribution of relaxation time is influenced by the presence of conducting ions in an amorphous formation. All assessed outcomes of these polymer electrolytes are assuring their use for electrochemical cell drives. © 2022 by the authors.
Kumar et al. (Fri,) studied this question.