LAVES PHASE-RELATED BCC METAL HYDRIDE ALLOYS FOR ELECTROCHEMICAL APPLICATIONS

摘要

Laves phase-related BCC metal hydride alloys historically have limited electrochemical capabilities. Provided are a new examples of these alloys useful as electrode active materials. Alloys include a composition defined by Formula I: TiwVxCryMz (I) where w+x+y+z=1, 0.1≦w≦0.6, 0.1≦x≦0.6, 0.01≦y≦0.6 and M is selected from the group consisting of B, Al, Si, Sn and one or more transition metals that achieve discharge capacities of 350 mAh/g or greater for cycles of 10 or more.

主权项

1. A Laves phase-related BCC metal hydride alloy of comprising the composition of Formula I:
TiwVxCryMz   (I)where w+x+y+z=1, 0.1≦w≦0.6, 0.1≦x≦0.6, 0.01≦y≦0.6, and M is selected from the group consisting of B, Al, Si, Sn and transition metals,
said metal hydride alloy having a capacity in excess of 350 milliamperes per gram at cycle 10.