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Transient ion dynamics, forced by external electric field in electrolytic cell with blocking electrodes

Transient ion dynamics, forced by external electric field in electrolytic cell with blocking... The nonlinear differential equations, describing the migration and diffusion of ions in electrolytic cell with blocking electrodes, driven by external electric field, have been solved with the help of a numerical algorithm. Usually, the dynamical equations are simplified by applying the Einstein–Nernst relation between diffusion and mobility, although this relation is valid for stationary, time-independent variables. In the present work, we have introduced correction terms, to take into account transient ion currents when external stepwise voltage is switched on. The correction terms are defined and numerically evaluated. The transient behavior of the system described without corrections is compared to the transients when corrections are applied. The results are examined for different regimes and parameters of the system. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

Transient ion dynamics, forced by external electric field in electrolytic cell with blocking electrodes

Ionics , Volume 14 (6) – Mar 14, 2008

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References (11)

Publisher
Springer Journals
Copyright
Copyright © 2008 by Springer-Verlag
Subject
Chemistry; Electrochemistry; Renewable and Green Energy; Optical and Electronic Materials; Condensed Matter Physics; Energy Storage
ISSN
0947-7047
eISSN
1862-0760
DOI
10.1007/s11581-008-0211-6
Publisher site
See Article on Publisher Site

Abstract

The nonlinear differential equations, describing the migration and diffusion of ions in electrolytic cell with blocking electrodes, driven by external electric field, have been solved with the help of a numerical algorithm. Usually, the dynamical equations are simplified by applying the Einstein–Nernst relation between diffusion and mobility, although this relation is valid for stationary, time-independent variables. In the present work, we have introduced correction terms, to take into account transient ion currents when external stepwise voltage is switched on. The correction terms are defined and numerically evaluated. The transient behavior of the system described without corrections is compared to the transients when corrections are applied. The results are examined for different regimes and parameters of the system.

Journal

IonicsSpringer Journals

Published: Mar 14, 2008

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