A MATHEMATICAL-MODEL FOR METAL HYDRIDE ELECTRODES

A mathematical model describing the discharge process of a metal hydri de electrode is developed. The model is used to predict the polarizati on behavior of a metal hydride electrode which can be used as an anode in different types of electrochemical cells. The electrode studied in the model is cylindrical, consisting of spherical metal hydride parti cles. The model takes into account the ohmic losses in the electrolyte and in the metal hydride powder, the diffusion of hydrogen in metal, and the charge transfer reaction at the surface of metal hydride parti cles. The model is used to analyze how changes in parameters affect th e performance of the electrode.