Ionic conductivity by correlated barrier hopping in NH4I doped chitosan solid electrolyte

Majid, Siti Rohana and Arof, Abdul Kariem and Buraidah, M.H. and Teo, L.P. (2009) Ionic conductivity by correlated barrier hopping in NH4I doped chitosan solid electrolyte. Physica B: Condensed Matter, 404 (8-11). pp. 1373-1379. ISSN 0921-4526, DOI

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Chitosan-NH4I and chitosan-NH4I-EC films have been prepared by solution cast technique. The sample containing 45 wt% ammonium iodide (NH4I) exhibited the highest room temperature conductivity of 3.7.10(-7) S cm(-1). The conductivity of the sample increased to 7.6 x 10(-6) S cm(-1) when 40wt% ethylene carbonate (EC) was added to the 55 wt% chitosan-45 wt% NH4I sample. The conductivity-temperature relationship is Arrhenian. From dielectric loss variation with frequency, the power law exponent was obtained. The temperature dependence of the power law exponent for chitosan-NH4I system follows the correlated barrier hopping (CBH) model while conduction mechanism of the plasticized system can be represented by the small polaron hopping (SPH) model. (C) 2009 Elsevier B.V. All rights reserved.

Item Type: Article
Additional Information: Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: Permittivity; Power law exponent; Correlated barrier hopping (cbh) model; Small polaron hopping (sph) model; Polymer electrolyte; Ac conductivity; Dielectric-properties; Transport-properties; Lithium; Salt; Behavior; Plasticizer; Membranes; Glasses
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Department of Physics
Depositing User: Miss Malisa Diana
Date Deposited: 05 Aug 2013 01:57
Last Modified: 27 Aug 2019 01:23

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