Digital simulation of fast cyclic voltammogram by integration of the double layer charging current

Abstract

A new digital simulation method considering the influence of ohmic drop on the cyclic voltammogram was developed, which eliminated the time-consuming iterations (successive approximations) for the calculations of the effective (real) electrode potentials by the integration of the charging current. In this simulation the total current I t (sum of the faradaic and charging currents) and charging current ( I c ) were calculated on the basis of the equivalent circuit of the electrochemical cell. The simulated pure charging current, total current, and peak potentials were compared with those calculated by the numerical resolution method to test the accuracy of this simulation method. The computation speed of this digital simulation was also assessed. High simulation accuracy, simple programming, and very short computation time are the main advantages of this new method.