Intermetallic compounds as negative electrodes of Ni/MH batteries

Citation
F. Cuevas et al., Intermetallic compounds as negative electrodes of Ni/MH batteries, APPL PHYS A, 72(2), 2001, pp. 225-238
Citations number
114
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
ISSN journal
09478396 → ACNP
Volume
72
Issue
2
Year of publication
2001
Pages
225 - 238
Database
ISI
SICI code
0947-8396(200102)72:2<225:ICANEO>2.0.ZU;2-I
Abstract
This review is devoted to the main families of thermodynamically stable int ermetallic compounds (AB(5)-, AB(2)- and AB-type alloys) that have been res earched in the last thirty years as materials for negative electrodes in ni ckel-metal hydride batteries. The crystal structure of these compounds and their hydrides is widely described. Their solid-gas hydrogenation propertie s and, particularly, the related desorption isotherm curves are examined as a useful criterion for the selection of suitable battery materials. The el ectrochemical performances obtained with these alloys are reported and the given solutions to common problems such as corrosion, passivation, decrepit ation and short cycle life are discussed. Only AB(5)-based compounds have a chieved, up to now, enough development for being widely present on the mark et. and exhibit improved battery performances in comparison with the pollut ing Ni/Cd batteries. The high capacity of AB(2)-based compounds and the rem arkable electrochemical activity of some AB-based alloys make, however, fur ther research on all the reviewed families still valuable.