Temperature, cycling, discharge current and self-discharge electrochemical studies 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 material. Strong dependence of temperature and discharge current was found for electrochemical applications. Pellet electrode showed good stability over 250 charge/discharge cycles. Self-discharge studies were carried out on completely charged electrode. The capacity of this electrode to absorb/desorb hydrogen could be defined as a stochastic function of some variables like temperature, cycling and discharge current conditions. More studies are in progress for calculating electrochemical parameters in these metal-hydride electrode systems. (C) 2001 International Association for Hydrogen Energy. Published by Elsevier Science Ltd. All rights reserved.