| 摘要 |
PURPOSE:To make a battery less expensive and improve the capacity keeping ratio and cycle life thereof, by making a negative electrode of a hydrogen absorbing alloy or a hydride, which is a five-element substance represented by Mm1-xLax(Nia.Cob.Alc). CONSTITUTION:A negative electrode 1 is made of a hydrogen absorbing alloy which is a five-element substance represented by a formula Mm1-xLax(Nia.Cob.Alc) in which Mm denotes Misch metal, the total quantity of La which is expressed by La/(Mm+La) is 35-70wt% and there are conditions of 0.1<x<0.6, 4.5<a+b+c<5.5, 3.5<a<4.3, 0.5<b<1.5 and 0.1<c<0.5. An enclosed-type alkaline storage battery is composed of the negative electrode 1, a positive electrode 2, a separator 3 and an alkaline electrolytic solution. The Misch metal is used as the main material of the battery to make it less expensive. The capacity keeping ratio of the battery is large. The quality of the battery is stable. The cycle life of the battery is long. |
