Investigation of plasticized ionic conductor based on chitosan and ammonium bromide for EDLC application

Chitosan-based polymer electrolytes incorporated with ammonium bromide (NH 4 Br) and glycerol were produced via solution casting technique. Characteristics of these electrolytes were examined using impedance technique, transport number measurement (TNM) and linear scan voltammetry (LSV). Based on the results obtained from impedance measurement, the sample with 40 wt.% glycerol achieved the highest ac and dc conductivies at room temperature. Dielectric behavior of the electrolytes was found to be improved upon incorporation of 40 wt.% glycerol, suggesting their relation with the conductivity trend. Result of TNM revealed that the conductivity has a huge contribution from ions. LSV analysis at 5 mV/s sweep rate showed that the best conducting sample is suitable for electrical double layer capacitor (EDLC) application. Specific capacitance ( C s ) of the single carbon based electrode was determined from cyclic voltammetry (CV) technique.