Patent ID: 6420067
Filing Date: 2002-07-16
Classification: C22C,H01M,Y02E,Y02P,Y10S

Abstract:
An Mg-based alloy negative electrode active material used in a hydrogen storage alloy electrode of an alkali secondary battery consisting essentially of an amorphous alloy containing Ni, Mg, Zn, and Zr and capable of electrochemically storing and releasing hydrogen,wherein a ratio of an Ni weight to a total weight of Mg, Zn, and Zr is 0.2 to 3.0, and wherein letting Mg(x).Zn(y).Zr(z) be a composition of Mg, Zn, and Zr except for Ni, the weight distribution x:y:z satisfies the conditions: 8096 wt %, 115 wt %, and 0.015 wt %(where x+y+z=100).