Ionic Conductivity and Dielectric Properties of CMC Doped NH sub(4) SCN Solid Biopolymer Electrolytes

In this work, solid biopolymer electrolytes (SBE) containing carboxymethyl cellulose (CMC) doped with ammonium thiocyanate (NH sub(4) SCN) were prepared via solution casting method. The ionic conductivity and dielectric properties of CMC-NH sub(4) SCN system were investigated by electrical impedance spectroscopy in the temperature range of 303-353 K. The dc conductivity shows that the highest ionic conductivity of 6.48 x 10 super(-5) Scm super(-1) at ambient temperature was obtained when 25 wt.% of NH sub(4) SCN was incorporated. The temperature dependence of ionic conductivity revealed that CMC-NH sub(4) SCN system was discovered to obey Arrhenius law where the regression value is almost unity (R super(2)[approximate]1). Activation energy of CMC-NH sub(4) SCN system was found to decrease with the increment of NH sub(4) SCN concentration. The dielectric behaviour of the CMC-NH sub(4) SCN system have been analyzed using dielectric permittivity ([epsilon]*) and electrical modulus (M*) spectra. Results from dielectric studies showed a non-Debye behaviour of CMC-NH sub(4) SCN system.