A HYDROGEN STORAGE ALLOY AND NEGATIVE ELECTRODE AND NI-METAL HYDRIDE BATTERY EMPLOYING SAME

摘要

A hydrogen storage alloy having a higher electrochemical hydrogen storage capacity than that predicted by the alloy's gaseous hydrogen storage capacity at 2 MPa. The hydrogen storage alloy may have an electrochemical hydrogen storage capacity 5 to 15 times higher than that predicted by the maximum gaseous phase hydrogen storage capacity thereof. The hydrogen storage alloy may be selected from alloys of the group consisting of A2B, AB, AB2, AB3, A2B7, AB5 and AB9. The hydrogen storage alloy may further be selected from the group consisting of: a) Zr(VxNi4.5-x); wherein 0 < x ≤ 0.5; and b) Zr(VxNi3.5-x); wherein 0 < x ≤ 0.9.