Hydrogen storage materials and methods of sizing and preparing the same for electrochemical applications

An active material for an hydrogen storage electrode, said material comprising:

• titanium being present in an amount greater than about 28 and less than about 36 atomic percent;
• vanadium being present in an amount greater than about 40 and less than about 56 atomic percent;
• and
• nickel being present in an amount greater than about 10 and less than about 22 atomic percent.

An active material for an hydrogen storage electrode comprising:

• titanium being present in an amount greater than about 15 and less than about 20 atomic percent;
• vanadium being present in an amount greater than about 15 and less than about 40 atomic percent;
• zirconium being present in an amount greater than about 10 and less than about 20 atomic percent;
• and
• nickel being present in an amount greater than about 30 and less than about 55 atomic percent.

An active material for an hydrogen storage electrode, said material comprising:

• titanium being present in an amount greater than about 5 and less than about 25 atomic percent;
• vanadium being present in an amount greater than about 40 and less than about 55 atomic percent;
• chromium being present in an amount greater than about 5 and less than about 25 atomic percent;
• and
• nickel being present in an amount greater than about 10 and less than about 25 atomic percent.

A hydrogen storage electrode for use in an electrochemical cell, said electrode comprising a material selected from the group consisting of:

• (TiV.sub.2-x Ni.sub.x).sub.1-y M.sub.y (a)
• where, 0.2.gtoreq.x.gtoreq.1.0, 0.gtoreq.y.gtoreq.0.2 and M=Al or Zr;
• Ti.sub.2-x Zr.sub.x V.sub.4-y Ni.sub.y (b)
• whereas, 0>x.gtoreq.1.5, 0.6>y.gtoreq.3.5;
• and
• Ti.sub.1-x Cr.sub.x V.sub.2-y Ni.sub.y (c)
• whereas, 0>x.gtoreq.0.75, 0.2.gtoreq.y.gtoreq.1.0.

An electrochemical cell comprising:

• at least one electrode means for storing energy, said electrode means including a material selected from the group consisting of:
• (TiV.sub.2-x Ni.sub.x).sub.1-y M.sub.y (a)
• wherein, 0.2.gtoreq.x.gtoreq.1.0, 0.gtoreq.y.gtoreq.0.2 and M=Al or Zr;
• Ti.sub.2-x Zr.sub.x V.sub.4-y Ni.sub.y (b)
• whereas, 0>x.gtoreq.1.5, 0.6.gtoreq.y.gtoreq.3.5;
• and
• Ti.sub.1-x Cr.sub.x V.sub.2-y Ni.sub.y (c)
• whereas, 0>x.gtoreq.0.75, 0.2.gtoreq.y.gtoreq.1.0;
• at least one counter electrode means providing for the release of the energy stored in said electrode means, said counter electrode means positioned in said cell and spaced in operative contact with said electrode means;
• and
• a casing having said electrode means and said counter electrode means position therein.