Abstract
Biodegradable carboxymethyl cellulose (CMC) doped with various compositions of NH4Br biopolymer electrolytes (BE) were successfully prepared via a solution-cast technique. The ionic conductivity for the CMC-NH4Br BE system was measured by using impedance spectroscopy, and the highest ambient temperature conductivity was observed to be 1.12 × 10−4 S cm−1 for the sample containing 25-wt.% NH4Br. The temperature dependence of the ionic conductivity revealed that the BE system followed an Arrhenius behavior. Jonscher’s universal power law was applied to analyze the AC conductivity of the highest conducting sample in the BE system, and the results indicate that the conduction is due to small polaron hopping (SPH) caused by a non-adiabatic mechanism.
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