Patent ID: 6238823
Filing Date: 2001-05-29
Classification: H01M,Y02E,Y10S

Abstract:
A non-stoichiometric AB.sub.5 structural type alloy comprising a composition having the formula AB.sub.5+X as an atomic ratio and a crystal lattice,wherein A is lanthanum or lanthanum and at least one other element selected from the group consisting of the rare earth metals, yttrium, mischmetal, or a combination thereof;wherein B is nickel and tin, or nickel and tin and at least a third element selected from the group consisting of the elements in group IVA of the periodic table, aluminum, manganese, iron, copper, antimony, or a combination thereof;wherein X is greater than 0 and less than or equal to about 2.0;wherein at least one substituted A site is occupied by two nickel atoms paired forming a dumbbell sub-structure proximally centered on said A site and oriented vertically along the c-axis; andwherein said composition does not contain cobalt.