Development of an electrode/electrolyte interface model based on pseudo-distributed elements combining COMSOL, MATLAB and HSPICE

This work describes a Combined Simulation System (CSS) able to predict the electrical behaviour of a metal electrode in contact with an electrolyte. The system is based on a mixture of Lumped Parameters Equivalent Electrical Circuits (LPEEC) and Pseudo-Distributed Elements (PDE): a PDE is a network of basic equivalent electrical circuits, e. g. resistor and capacitor parallels, in which a geometrical information can be retained. Electrochemical Impedance Spectroscopy (EIS) measurements have been performed on a standard solution of known electrical conductivity with Micro-Electrodes Array (MEA) devices in order to investigate set-up parasitic elements and electrochemical interfaces parameters. CSS performance has been compared to usual LPEEC fit approach in terms of both results accuracy and solving time. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of the Institute of Bio-Sensing Technologies, UWE Bristol.