Abstract
Composite polymer electrolytes based on polyvinyl alcohol: polyvinylidine fluoride: lithium triflate doped with different concentration of nanosilica have been prepared by the solution casting technique. The prepared films are transparent and mechanically stable. Interaction of SiO2 nanoparticles with the host polymer in the composite polymer electrolyte has been confirmed using X-ray diffraction, Fourier transform infrared spectroscopy, and photoluminescence spectra. Dispersion of nanofiller in the polymer matrix help to increase the free volume of the system and thus increases amorphous nature. The optimal composition of composite polymer electrolytes was found possessing high conductivity, thermal, mechanical and electrochemical stability, which will be well suited for lithium ion battery applications.
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