Abstract
The authors report experimental investigation on a solid polymer electrolyte PEO + NH4PF6. The solid thin films of different compositions of PEO + NH4PF6 complex were synthesized using solution cast technique and characterized. Complexation between polymer and the salt has been established using X-ray diffraction, Fourier transform infrared spectroscopy, differential thermal analysis, and thermogravimetric analysis. Ion transport in the polymer material has been studied by electrical conductivity measurements with composition, temperature, and humidity; by total ionic transference number measurement; and by dielectric measurements. The maximum room temperature (∼29°C) conductivity of the material has been found to be 1.04 × 10−6 S cm−1 for at RH = 60%. The conductivity shows strong humidity dependence. The temperature dependence of the conductivity shows the Arrhenius behavior. The total ionic transference number of the electrolyte material has been found to be between 0.94 and 0.97.
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