Improved hydrogen sorption characteristics in FeTi(1+x)Mm material

We report the synthesis and characterisation of FeTi1+x + 4.5wt%Mm (x = 0.3, 0.4 and 0.5) as advanced FeTi-based hydrogen storage materials and their hydrogen sorption characteristics: The synthesis of this material was accomplished by melting the stoichiometric mixture of its ingredients in an inert (Ar) atmosphere using an R.F. induction furnace. The synthesised material was characterised by X-ray, which showed the presence of FeTi (major phase), FeTi2 (minor phase) and some titanium. The maximum storage capacity (similar to 1.71wt%)corresponded to x = 0.3. Interestingly, the hydrogen storage capacity at 100 degrees C corresponded to similar to 1.9wt%. The transmission electron microscopic investigations of virgin and hydrogenated samples were compared. The existence of special microstructure features, e.g. channel-like configurations in the hydrogenated sample may be responsible for the improved hydrogenation/dehydrogenation characteristics.