A permeation model for the electrochemical interface

Preiss, Ulrich P. R. M.; Borukhovich, Efim; Alemayehu Zerihun, Nega; Steinbach, Ingo; La Mantia, Fabio

doi:10.1088/0965-0393/21/7/074006

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A permeation model for the electrochemical interface

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Alemayehu Zerihun, Nega
Interdisciplinary Centre for Advanced Materials Simulation (ICAMS), Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum, Germany;
Interface Spectroscopy, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Citation

Preiss, U. P. R. M., Borukhovich, E., Alemayehu Zerihun, N., Steinbach, I., & La Mantia, F. (2013). A permeation model for the electrochemical interface. Modelling and Simulation in Materials Science and Engineering, 21(7): 074006. doi:10.1088/0965-0393/21/7/074006.

Cite as: https://hdl.handle.net/21.11116/0000-0001-D52F-B

Abstract

We show the transferability of the recently introduced concept of permeation from the context of finite dissipation in simple metallic interfaces to much more complicated electrochemical interfaces. The phenomenological bridge is formed by the exchange current, which can be measured by either impedance spectroscopy or by cyclic voltammetry. In a proof-of-concept phase field model, Nernst-Planck diffusion and transport of charged species in a potential gradient as the solution of the Poisson equation are considered. It is shown that charges build up on the outer electrode surface in a fashion resembling the electrochemical double layer. © 2013 IOP Publishing Ltd.