Characterization of Solid Polymer Electrolyte Based on Methylcellulose Doped Ammonium Bromide

Abstract

A new biodegradable and low cost solid polymer electrolyte (SPE) membrane mainly from Methylcellulose (MC) blended with Ammonium Bromide (AB) to enhance the SPEs ionic conductivity. Casting method was used in this study in order to produce thin film. In this study, MC as a based doped with different weight percentage of AB (4%, 9%, 14%, 19%, 24% and 29%) to produce thin film for further study on polymer electrolytes. Two objectives were done in this study: prepare MC doped AB thin film via casting method and to determine and compare the conductivity of MC and AB with different weight percentage (wt.%) of AB. The result shows that different weight percentage of salt resulting different result of conductivities as ion conductivities is the major part in the battery system. Sample MCAB19 was found to have the maximum ionic conductivity value of 1.42 x 10−7Scm−1 at room temperature. The samples’ conductivity is very low comparing to the commercial used nowadays. However, it is proven that the combination of MC and AB has the prospective to be an alternative to a SPE in the battery.