Mathematical Analysis of Potential Losses in a Thick Porous Metal HydrideElectrode during a Discontinuous Discharge

摘要

The authors consider a thick porous metal hydride electrode in a temporarilyinterrupted discharge. During a break the hydrogen and electrolyte concentrations tend to level steady states, which leads to a recovery phenomenon seen in the decrease in the potential loss in the electrode when the discharge is restarted. A mathematical model is used in studying the electrochemical system. The potential loss is expressed as a sum of potential losses due to various sources and spatial averaging is used in analyzing the individual losses as well as the reaction conditions. Furthermore, a simple model is developed for describing the behavior of the hydrogen concentration during a break.