Zirconium-based hydrogen storage alloy useable for negative electrodes for secondary battery

Abstract

A zirconium-based hydrogen storage alloys having the composition formula:Zr.sub.1-x Q.sub.x Cr.sub.1-Y-Z-A-B Mn.sub.Y Fe.sub.Z Co.sub.A V.sub.B Ni(I)wherein Q is Ti or Hf; 0<x.ltoreq.0.3; and 0<Y+Z+A+B<1, are disclosed. The Zr-based hydrogen storage alloy has a C-14 hexagonal structure and is mainly composed of single phase. The alloy is useable for a negative electrode material for secondary batteries. The Zr-based hydrogen storage alloy also has also a discharge capacity of 300.about.377 mAg/g and low reduction of discharge capacity at a low temperature and discharge rate.