Mobility and density of ions in chitosan-orthophosphoric acid-ammonium nitrate electrolytes
Document Type
Article
Publication Date
1-1-2007
Abstract
An important factor that contributes significantly to the conductivity of a material is the number density and mobility of the mobile species. In this work the number density of mobile ions, n, was calculated using the Rice and Roth model and the random walk formulation. The value of n as calculated using the Rice and Roth model depends on the activation energy and mean free path of the ions whereas calculation using the random walk formulation depends on the hopping rates of the ions. Our results show that the values of n calculated using the random walk formulation is more than one order of magnitude larger than that calculated using the Rice and Roth model. Unlike mobility, the values of n do not show significant changes with temperature. This suggests that mobility influences the conductivity of the polymer at elevated temperatures. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinbeim.
Keywords
Polymer electrolyte, Conductivity, cyclic voltammetry, Transport, System, Films, Conductors, Salt
Divisions
PHYSICS
Publication Title
Physica Status Solidi A
Volume
204
Issue
7
Publisher
John Wiley & Sons
Additional Information
Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA