Conductivity studies of chitosan polymer doped sa-oa electrolytes

Abstract

In this study, polymer electrolytes were prepared by the technique of solution casting. These proton conducting electrolytes consist of high-molecular-weight poly(methyl methacrylate) (PMMA) matrix, ethylene carbonate (EC) /propylene carbonate (PC) and organic acid. Two different samples with the following molar weight percent were studied. The electrolytes are salicylic acid (SA): 5 wt.% /EC: 35 wt.% /PC: 35 wt.% /PMMA: 12.5 wt.% /CA: 12.5 wt.% and oleic acid (OA): 10 wt.% /CA: 50 g. This experiment involves Electrochemical Impedance Spectroscopy (EIS) measurement. From the impedance data, a Cole-Cole plot was obtained and therefore the bulk resistance, Rb can be calculated. The conductivity obtained for this work is 2.65 x 10-5 Scm- 1 for sample containing SA whereas electrolytes containing OA gives the value of 1.02 x 10-9 Scm- 1 • Dielectric data were analyzed using complex permittivity e* and complex electrical modulus M* for both sample. Information on relaxing dipole in a medium may be obtained from an analysis of complex permittivity.