Hydrogen storage alloy for alkaline battery and production method thereof, as well as alkaline batt

文件类型：PDF文档
文件大小：455K
To provide a hydrogen storage alloy for an alkaline battery capable of having high performance of power characteristics much more beyond the related-art range, and a production method thereof, as well as an alkaline battery by investigating the constituent ratios of the A2B7-type structure and the A5B19-type structure. The hydrogen storage alloy for an alkaline battery of the present invention includes : an element R selected from the Group IV and the rare earth elements including Y and excluding La; and an element M consisting of at least one of Co, Mn, and Zn. The hydrogen storage alloy is represented by general formula : LaαR1-α-βMgβNiγ-η-εAlηMε (wherein α, β, y, η, ε satisfy numerical formulae : 0≤α≤0.5, 0.1≤β≤0.2, 3.7≤γ≤3.9, 0.1≤η≤0.3, 0≤ε≤0.2); and the constituent ratio of the A5B19-type structure is 40% or more in the crystal structure thereof.