Ion transport characterization and cell potential discharge performance studies of hot-press casted solid polymer electrolyte (SPE): [(1-x)PEO: xAg(ClO4)]

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 similar to 100-150 mu m 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 (sigma) similar to 5.64x10(-6) 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 (sigma), total ionic transference number (t(ion)) 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 (E-a) from the linear least square fitting of 'log sigma-1/T' Arrhenius plot. All-solid-state battery has been fabricated in the cell configuration: Ag (anode)//Solid Polymer Electrolyte// I-2 + C + SPE (cathode). The electrodes used were in the form of thin pellet. The Open Circuit Voltage (OCV) similar to 0.64 V. The cell performance has been studied by recording the cell potential discharge profiles at room temperature under different load conditions.