An enhancement on electrical properties of carboxymethyl cellulose-NH 4 Br based biopolymer electrolytes through impedance characterization.

In this work, the formulation of biopolymer electrolytes (BEs) system has been accomplished by incorporating various plasticizers with carboxymethyl cellulose–NH4Br through solution casting technique. The ionic conductivity at room temperature of BEs system was achieved at ∼10−4S cm−1with addition of 25 wt% NH4Br and enhanced to ∼10−3S cm−1when plasticizers were added. The temperature-dependence of the BEs system exhibits Arrhenius behavior. Jonschers power law was used to study the electrical properties and shows that the highest conducting BEs system can be represented by overlapping overlapping a large polaron tunneling model for poly(ethylene glycol) system a, small polaron hopping model for glycerol system, and a quantum mechanical tunneling model for ethylene carbonate system. [ABSTRACT FROM AUTHOR]