Abstract
Solid polymer electrolytes have been extensively studied due to wide applications in various elec- trochemical devices (1)-(3). Most of the solid polymer electrolytes consist of polymer as a host material to provide strength and good mechanical stability and an inorganic salt that supplies io- nic carriers to cause electrical conductivity. In our studies, we prepared PVA/NH4NO3 polymer electrolyte films by solution casting method. The prepared films with varied Ammonium Nitrate concentration from 0 - 20 wt% are characterized by XRD & FTIR spectroscopy. XRD results show that amorphous nature increases as the amount of the Ammonium Nitrate salt in PVA is increased. IR-spectra confirm the polymer salt complexes in the range of 3700 - 712 cm −1 . Conductance anal- ysis reveals that polymer electrolyte films containing 20 wt% of NH4NO3 exhibit the highest ionic conductivity of 1.01 × 10 −7 S/cm while pure PVA films give the lowest ionic conductivity of 2.10 × 10−11 S/cm. It was evident from this study that the increase of ionic conductivity depended on the Ammonium Nitrate salt concentration. The dielectric constant exponentially decreases with in- crease of frequency for pure PVA and NH4NO3 doped PVA film composites. The temperature de- pendent studies of AC conductivity and dielectric constant also included to understand the con- ducting property. The results obtained by these studies are reported in this work.
Highlights
Polymers form a very important class of materials without which life seems very difficult
Peaks corresponding to NH4NO3 have been found to be absent in the complexes indicating the complete disassociation of salt in polymer matrix
1) Polyvinyl alcohol (PVA) based polymer electrolyte films with different concentrations of Ammonium Nitrate has been prepared by solution casting technique
Summary
Polymers form a very important class of materials without which life seems very difficult. (2015) Studies on AC Electrical Conductivity and Dielectric Properties of PVA/NH4NO3 Solid Polymer Electrolyte Films. Advances in Materials Physics and Chemistry, 5, 295-301. The addition of inorganic salts into a polymer matrix can improve its conductivity. PVA is one of the most important polymer materials and it has many applications in industry, it exhibits good film forming property and enhances the conductivity. NH4NO3 is a white crystalline solid at room temperature and pressure. The present study is focused on the preparation and characterization of PVA-NH4NO3 polymer electrolyte films [4]-[6]
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