| 摘要 |
PURPOSE:To improve discharge capacity in a high temperature using relatively low cost materials, by using a negative electrode made of a hydrogen occlusion alloy or a hydride, including five elements shown as a formula LnNix(Co1.Mnb.Alc)y. CONSTITUTION:The negative electrode is formed of a hydrogen occlusion alloy or a hydride including five element shown as a formula LnNix(Coa.Mnb.Alc)y, (where Ln is simply of Mn or a mixture of Mn and La, the content of La in the Ln is 25 to 70wt%, 3.5<x<=4.3, 0.7<=y<=1.7, 4.3<x+y<5.5, 0.2<=a<=1.0, 0.2<=b<=0.8, and 0.1<=c<=0.5). The enclosed type alkaline storage battery is formed combining the said negative electrode, a positive nickel electrode, a separator, and an alkaline electrolyte. Therefore, the negative electrode is made of relatively low cost materials, the cell property in a high temperature is improved, and the rise of the gas pressure in the battery owing to an overcharge can be controlled. |
