Optimization of Free standing Polymer Electrolytes films for Lithium ion batteries application

Abstract

The free standing polymer nancomposite films consisting of blend polymer based on Poly(acrylonitrile) (PAN) as host polymer–Poly(ethylene oxide)(PEO) as a copolymer, Dimethylformamide (DMF) as solvent and Lithium hexaflourophosphate (LIPF₆)  as a conducting speciesm were prepared. Keeping in view of characterization of solid state film such as, Fourier transform infrared (FTIR) spectroscopy is done for an understanding of the microscopic interaction among the different component present in the material system. The energy storage/conversion device applications have been analyzed by the impedances spectroscopy. The surface morphology or micro-structural of the polymer nanocomposite electrolytes film was analyzed by FESEM. The electrochemical stability window was about ~4V for the polymer electrolyte film at (/Li=6). The advantageous outcome of PAN combining with PEO based electrolytes is in comparable electrical conductivity and wider electrochemical stability window. Further optimization might lead to practical solid­ state polymer electrolytes for lithium ion batteries.