A commercial-grade 1.2-V/6-Ah nickel/metal hydride cell

The performance of a commercial-grade 1.2-V/6-Ah nickel/metal hydride cell is reported in terms of discharge characteristics and cycle life. The cell is comprised of compacted, metal hydride negative electrodes, made out of a stoichiometric AB2-Laves phase with nominal composition Zr0.5Ti0.5V0.6Cr0.2Ni1.2, and sintered nickel positive electrodes. The cell can withstand prolonged charge–discharge schedules with little deterioration in performance. The effect of varying discharge rate and temperature is also examined.