Abstract

• Solid polymer electrolyte films with different weight percent ratios of lithium bis (trifluoro methane sulphonyl) imide (LTFSI) salt were prepared using solution casting method. The conductivity and dielectric response of the solid polymer electrolyte systems were studied within the frequency range of 120Hz and 1kHz at room temperature. The conductivity of an electrolyte depends on the ability of the polymer host to solvate the (LTFSI) salt. Polymers with higher dielectric constant will serve the purpose better. The dielectric constant and electrical conductivity follow the same trend with (LTFSI) salt concentration. It was observed that the magnitude of conductivity had increased with the increase in salt concentration. FTIR and XRD techniques were used in the complexed studies. The values of dielectric constant were decreased with increasing frequency.