Temperature, cycling, discharge current and self-discharge electrochemicalstudies to evaluate the performance of a pellet metal-hydride electrode

In this paper, we report electrochemical charge/discharge of hydrogen for a pellet metal-hydride electrode using an MmNi(5-x)M(x) alloy as active mate rial. Strong dependence of temperature and discharge current was found for electrochemical applications. Pellet electrode showed good stability over 2 50 charge/discharge cycles. Self-discharge studies were carried out on comp letely charged electrode. The capacity of this electrode to absorb/desorb h ydrogen could be defined as a stochastic function of some variables like te mperature, cycling and discharge current conditions. More studies are in pr ogress for calculating electrochemical parameters in these metal-hydride el ectrode systems. (C) 2001 International Association for Hydrogen Energy. Pu blished by Elsevier Science Ltd. All rights reserved.