Inderscience Publishers

Electrochemical hydrogen storage characteristics of TiVNi–quasicrystalline composite materials

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The Ti1.4V0.6Ni ribbon alloy and VTZN (V5Ti9Zr26.7Ni38Cr5Mn16Sn0.3) alloy ingot are prepared by melt–spinning technique and induction levitation melting technique, respectively. The Ti1.4V0.6Ni + 20 wt.% VTZN mixture powders are synthesised by ball–milling the above prepared alloy ingots, and their structures and the electrochemical hydrogen storage properties are investigated. It is found that the icosahedral quasicrystal, FCC and BCC structural solid solution phase are all presented in the composite material. The maximum electrochemical discharge capacity of the composite electrode is 308.2 mAh/g at the discharge current density of 30 mA/g and 303 K. In addition, the electrode made of Ti1.4V0.6Ni and AB3 composite holds better high–rate discharge ability than that of Ti1.4V0.6Ni.

Keywords: electrochemical hydrogen storage, titanium alloys, vanadium, nickel, icosahedral quasicrystals, TiVNi alloys, VTZN alloys, composite materials, melt spinning, induction levitation, structures, ingots, quasicrystalline composites, nanotechnology

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