Reversible hydrogen storage

Gross et al. (2002) NaAlHj Phase transformation, metal transport + + n.a. Liberation of hydrogen, reversible storage... 

The lanthanides can form hydrides (qv) of any composition up to LnH. Lanthanide hydrides can desorb hydrogen reversibly with temperature. Therefore, the lanthanides and some of thek alloys ate good candidates for hydrogen (qv) storage, of which LaNi is probably the most promising (see... 

B. Bogdanovic, M. Felderhoff, S. Kaskel, A. Pommerin, K. Schlichte, F. Schiith, Reversible Storage of Hydrogen using Doped Alkali Metal Aluminum Hydrides, 2001, WO 03/053848 Al. 

Another interesting lithium-based system is Li3N/Li2NH [53]. Lithium nitride can be hydrogenated to lithium imide and lithium hydride (5.4 wt% H2). The latter reaction can be used for reversible storage at 250°C. The formation of ammonia can be completely avoided by the addition of 1% TiCl3 to the system, which has the positive additional effect to improve the kinetics [54]. Very fast kinetics has been reported for a partially oxidized lithium nitride [55]. 

I0J.J. Vajo, S.L. Skeith and F. Mertens, Reversible Storage of Hydrogen in Destabilized LiBH4, J. 

This could have far-reaching consequences, as mechanically induced disorder can be a factor in activation of well-ordered intermetallic compounds (alloys) for reversible reactions with molecular hydrogen. Figure 1.20b shows the PCT plots, which details hydrogen sorption properties for B2-type FeTi, an important hydrogen storage alloy with capability for reversible storage at room temperature applications. The plateau of equilibrium sorption is lowered in ball milled, disordered FeTi in comparison with the not-milled counterpart. Therefore, the alloy has been... 

In situ diffraction studies during the release of hydrogen allowed a comprehensive insight into the phase transformation processes taking place during the reversible storage ofhydrogen [113,114]. The decomposition mechanism for sodium aluminum... 

Schiith, F., Bogdanovic, B., and Akira, T. (2004) Materials encapsulated in porous matrices for the reversible storage of hydrogen, WO/2005/014469. 

Vajo J J, Skeith S L and Mertens F (2005), Reversible storage of hydrogen in destabilized LiBH4, J. Phys. Chem. B, Lett, 109, 3719-3722. 

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