OPEN-CIRCUIT POTENTIAL-TIME TRANSIENTS OF ALKALINE POROUS IRON ELECTRODES AT VARIOUS STATES-OF-CHARGE

Open-circuit potential-time transients during the discharge of alkaline porous iron electrodes at various states-of-charge have been studied. From this, it has been possible to arrive at a correlation between the parameters of self-discharge kinetics of the electrode and observed open-circuit potential-recovery time constants. The study provides a method to estimate the state-of-charge of the rechargeable iron electrodes. As a hydrogen evolution reaction inevitably occurs on alkaline iron electrodes, the kinetics of the reaction have also been investigated.