Carboxyl methylcellulose solid polymer electrolytes: Ionic conductivity and dielectric study

M.N. Chai, M.I.N. Isa


The electrical conductivity and thermal conductivity of carboxyl methylcellulose and oleic acid have been measured by the electrical impedance spectroscopy method in the temperature range of 303 – 393 K. The composition of oleic acid was varied between 0 and 30 wt. % and the samples were prepared via solution casting technique. The highest ionic conductivity at room temperature, σrt (303K) is 2.11 x 10-5 S cm-1 for sample containing 20 wt. % of oleic acid. The system was found to obey Arrhenius rule where R2 ≈ 1. The dielectric study (, ) shows a non-Debye behavior. The activation energy of relaxation is higher than the activation energy of conduction implies that the charge carrier has to overcome the higher energy barrier during conducting.

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