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Electrical Characterization and Ionic Transport Properties of Carboxyl Methylcellulose-Oleic Acid Solid Polymer Electrolytes
Authors:M N Chai
Institution:1. Advanced Materials Research Group, Renewable Energy Research Interest Group, Department of Physical Sciences , Faculty of Science &2. Technology, University Malaysia Terengganu , Terengganu , Malaysia
Abstract:Electrical impedance spectroscopy was used to measure the conductivity of solid polymer electrolytes. From the impedance study, the highest ionic conductivity of solid polymer electrolytes based on carboxyl methylcellulose as polymer host and oleic acid as the doping salt, prepared by the solution casting method at room temperature, σr.t, is 2.11 × 10?5 S cm?1 for the sample containing 20 wt.% of oleic acid. Transference number measurement was performed to correlate the diffusion phenomena to the conductivity behavior of carboxyl methylcellulose-oleic acid solid polymer electrolytes. From the transference number measurement study, the conduction species carrier of the cation (+) is higher than that of the anion (?). Thus, the results proved that the samples are proton-conducting solid polymer electrolytes.
Keywords:Carboxyl methylcellulose  Natural solid polymer electrolytes  Oleic acid  Proton conductor
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