Ion transport characterization and cell potential discharge performance studies of hot-press casted solid polymer electrolyte (SPE): [(1 - x )PEO: x Ag(ClO 4 )]

Ion transport in poly (ethylene oxide) based Solid Polymer Electrolyte (SPE) membranes: [(1−x)PEO: xAg(ClO4)], where x = 0, 2, 4, 6, 8, 10, 15, 20 wt. (%), has been studied. SPE films of uniform thickness ~100-150 μm have been casted by hot-press technique. The conductivity dependent on salt concentration has been measured and SPE film: [85PEO: 15 Ag (ClO4)] has been identified as Optimum Conducting Composition (OCC) with room temperature conductivity (σ) ~ 5.64× 10 S/cm. The characterization of materials and ion transport properties in SPE OCC film have been done. In order to understand the ion transport mechanism, conductivity ( ), total ionic transference number (tion) and cation (Ag ) transport number (t+) have been determined using ac impedance, dc polarization and combined ac/dc techniques, respectively. The temperature dependent conductivity has also been measured to evaluate the activation energy (Ea) from the linear least square fitting of ‘log −1/T’ Arrhenius plot. All-solid-state battery has been fabricated in the cell configuration: Ag (anode)//Solid Polymer Electrolyte// I2 + C + SPE (cathode). The electrodes used were in the form of thin pellet. The Open Circuit Voltage (OCV) ~ 0.64 V. The cell performance has been studied by recording the cell potential discharge profiles at room temperature under different load conditions.