HYDROGEN STORAGE ALLOY ELECTRODE

摘要

PROBLEM TO BE SOLVED: To produce a hydrogen storage alloy electrode for a nickel-hydrogen battery improved in cycle long life characteristics. SOLUTION: This hydrogen storage alloy electrode for a nickel-hydrogen battery is produced by a single roll method, a twin roll method, an atmizing method or a liquid dynamic compaction method (LDC method). In this case, in powder X-ray diffraction, it is expressed by a compositional formula of AB2 (Laves phase) or AB5 (misch metal series) in which the value of ununiform distortion (η) expressed by Hall-Williamson relation lies in the range of 0.03 to 1.00% and is subjected to no heat treatment.