Article ID Journal Published Year Pages File Type
1623739 Journal of Alloys and Compounds 2008 4 Pages PDF
Abstract

We report large reversible hydrogen storage in a new coupled system, LiBH4/CaH2, via the reaction 6LiBH4 + CaH2 ↔ 6LiH + CaB6 + 10H2 having a theoretical hydrogen capacity of 11.7 wt% and an estimated reaction enthalpy of ΔH = 59 kJ/mol H2. Samples that include 0.25 mol (18.2 wt%) TiCl3 reproducibly store 9.1 wt% hydrogen, corresponding to 95% of the available hydrogen. H2 is the only evolved gas detected by mass spectrometry. X-ray diffraction confirms that the sample cycles between LiBH4 and CaH2 in the hydrogenated state and LiH and CaB6 in the dehydrogenated state.

Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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