Hydrogen occlusion alloys for electrical cells

Details Hydrogen occlusion alloys for electrical cells Hydrogen occlusion alloys for electrical cells

1997-06-23

1999-05-11

Sheehan, John

Alloys or metallic compositions

Nickel base

Rare earth containing

420580, 420900, 429223, C22C19/03

Patent

active

059025450

ABSTRACT:
Provided is a hydrogen occlusion alloy suitable for a negative electrode material of a closed type nickel hydride secondary cell in which the increase of gas pressure in the cell during overcharging is prevented and self discharge in the open circuit state would be effectively inhibited, being represented by the following compositional formula: ANiaCobMncXd wherein A is a misch metal containing not more than 60% by weight of Ce, X is at least one element selected from the group consisting of Al, CU, Mo and Zn, and a, b, c and d are numbers satisfying the following relations: 0.4 <b<2.0, 0.ltoreq.c<0.2, 0.1<d<2.0, and 4.55<a+b+c+d<4.80.

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