Temperature Dependent Ionic Conductivity and Mobility Studies of Hot-pressed Solid Polymer Electrolytes

Temperature dependent ionic conductivity (sigma), ionic mobility (mu), and mobile ion concentration (n) of the hot-pressed Solid Polymer Electrolytes (SPEs): (1-x) PEO: x NaBr, where 0 < x < 50 in wt. %, has been reported. SPE films have been casted using a hot-press technique in place of the traditional solution cast method. A conductivity enhancement of the two orders of magnitude was achieved in SPE film composition: (70PEO: 30NaBr) at room temperature and this has been referred to as Optimum Conducting Composition (OCC). To determine the activation energy (E-a), energy of migration (E-m) and energy of formation (E-f) temperature dependent studies of SPE OCC have been carried out with the help of various experimental procedures.