High capacity and high performance Zr-based hydrogen storage alloy for secondary cells

Abstract

A hydrogen storage alloy, represented by the following formula I which is suitable for use as an active anode material for ni-metal hydride secondary cells by virtue of its high discharge characteristics including, for example, a discharge capacity ranging from approximately 300 to 400 mAh/g and a rate capability of at least 80%; Zr12212#xtix(MnuVvNiy)z2003#2003#I wherein, x, u, v, and z each represent an atom fraction under the condition of: 0003c#x0.2, 1.5u0.7, 0.5v0.7, 1.0y1.4, and 0.84z1.0.1.