Electrochemical model of the transient resistance of a bubble layer

At high current densities, electrolysis occurs at the electrode-electrolyte interface and the gas evolved creates a bubble layer. To study the electrical effects of the bubble layer, a model based on electrochemistry and geometric considerations is developed. The model is used to determine the contribution of the bubble layer to the interelectrode impedance in a simple, axisymmetric electrochemical cell. Results indicate that the bubble layer can contribute up to a few ohms to the impedance during defibrillation-like shocks. The bubble layer is also expected to improve the uniformity of the current distribution profile over electrode surfaces