DYNAMICS OF ELECTRON HOPPING IN REDOX POLYMER ELECTRODES USING KINETIC ISING-MODEL

The analysis of diffusion-migration equations pertaining to electron h opping and physical displacement in redox polymer electrodes is carrie d out using kinetic Ising model formalism. It is shown that, by the ap propriate choice of transition probabilities obeying detailed balancin g conditions, a hierarchy of transport equations can be derived. Earli er transport equations due to Nernst-Planck and Saveant are derived as special cases. The dependence of apparent diffusion coefficient on nu mber density of redox centres, polymer morphology etc. are pointed out . Several new insights concerning the microscopic basis underlying the hitherto known phenomenological equations are demonstrated.