ABSTRACT
Abstract ................................................................................................... 18 2.1 Introduction .................................................................................... 18 2.2 Experimental Details ...................................................................... 20 2.3 Result and Discussion .................................................................... 21 2.4 Conclusion ..................................................................................... 28 Keywords ................................................................................................ 28 References ............................................................................................... 28
ABSTRACT
Solid polymer electrolytes are prepared by complexing methanesulfonic acid (MSA) with poly (vinyl pyrrolidone) (PVP) matrices. Various compositions of polymer electrolytes are tailored by solution casting technique using N,N-Dimethyl formamide (DMF) as solvent. The complex formation between the host polymer and methanesulfonic acid are conformed by FT-IR spectroscopy. Dependence of ionic conductivity with frequency is carried out at different temperatures. From impedance analysis, higher conductivity is found to be 9.72±0.03x10-6 S/cm at ambient temperature for 16.77 mol% concentration of methanesulfonic acid. The enhancement of conductivity is observed to the order of 105 times with the addition of 16.77 mol% of MSA to PVP host polymer. At 20.82 mol% of MSA, decrease of conductivity is noticed and its value again increases gradually for 24.81mol%, 30.79 mol%, 34.65 mol% of MSA concentrations. Sudden drop of conductivity is again observed at 40.5 mol% of MSA. Temperature dependent dielectric relaxation and modulus spectra of PVP-MSA membranes are also studied using a.c. impedance spectroscopy.
