Radiation — Induced graft copolymerization base polymer electrolytes

Polymer electrolytes comprising of a grafted chitosan with poly(methylmethacrylate) (PMMA) were prepared by gamma irradiation induced graft polymerization technique and then subsequently doped with different concentration of lithium triflate (LiTf) salt. The structure and complexation of the electrolytes were studied by X-ray Diffraction (XRD) and Fourier Transform Infrared (FTIR) spectroscopy. The ionic conductivities of the electrolytes were measured in the temperature range of 303-373 K. The maximum conductivity of 1.63 × 10^-4 Scm^-1 is obtained for the polymer with 50 wt% LiTf. The temperature-dependence conductivity data obeys Arrhenius relationship. Dielectric behavior was analyzed using complex permittivity (E) and complex electrical modulus (M´) for the different concentration of LiTf salt.