Details

Autor(en) / Beteiligte

• Pinkerton, F.E.
• Meyer, M.S.

Titel

Reversible hydrogen storage in the lithium borohydride—calcium hydride coupled system

Ist Teil von

• Journal of alloys and compounds, 2008-09, Vol.464 (1), p.L1-L4

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2008

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• We report large reversible hydrogen storage in a new coupled system, LiBH 4/CaH 2, via the reaction 6LiBH 4 + CaH 2 ↔ 6LiH + CaB 6 + 10H 2 having a theoretical hydrogen capacity of 11.7 wt% and an estimated reaction enthalpy of Δ H = 59 kJ/mol H 2. Samples that include 0.25 mol (18.2 wt%) TiCl 3 reproducibly store 9.1 wt% hydrogen, corresponding to 95% of the available hydrogen. H 2 is the only evolved gas detected by mass spectrometry. X-ray diffraction confirms that the sample cycles between LiBH 4 and CaH 2 in the hydrogenated state and LiH and CaB 6 in the dehydrogenated state.