LAVES PHASE-RELATED BCC METAL HYDRIDE ALLOYS AND ACTIVATION THEREOF 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. Also provided are processes of activating such alloys. Alloys include a composition defined by Formula I: TiwVxCryMz (I) where w+x+y+z = 1, 0.1w0.6, 0.1x0.6, 0.01y0.6 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.