Preparation and characterization of hot-pressed solid polymer electrolytes: (1-x)PEO: xNaBr
Preparation and ionic transport characterizations of a new Na+ ion conducting hot-pressed solid polymer electrolytes (SPEs) (1-x)PEO: xNaBr, where 0 < x < 50 in wt%, have been reported. SPE films have been prepared using a hot-press technique in place of the traditional solution cast method. Two orders of magnitude of the conductivity enhancement achieved in SPE film composition (70PEO:30NaBr) at room temperature. Polymer-salt complexations and thermal behavior of present SPEs have been explained with the help of X-ray diffraction (XRD), differential scanning calorimetric (DSC), thermogrevimetric analysis (TGA) and scanning electron microscopy (SEM) technique. The Na+ ion conduction in the present SPEs has been discussed on the basis of experimental measurements on its ionic conductivity σ, ionic mobility μ and ionic transference number tion at room temperature. Temperature dependent ionic conductivity measurement has also been carried out to calculate the activation energy Ea.
Solid polymer electrolytes; ionic conductivity; hot-press technique; XRD; FTIR; DSC; TGA
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