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MM: Fachverband Metall- und Materialphysik
MM 39: SYM Hydrogen in Materials: New Developments III
MM 39.3: Vortrag
Donnerstag, 28. Februar 2008, 15:00–15:20, H 1058
Direct synthesis of LiBH4 monitored by in-situ neutron diffraction — •Arndt Remhof1, Oliver Friedrichs1, Florian Buchter1, Andreas Züttel1, and Dirk Wallacher2 — 1EMPA, Swiss Federal Laboratories for Materials Resaerch, Dübendorf, Switzerland — 2Hahn Meitner Institut, Berlin Neutron Scattering Facility, Berlin, Germany
Due to its large hydrogen content, LiBH4 is a promising candidate for a hydrogen storage material. Recently, we discovered a way to synthesize LiBH4 directly from the respective elements, by exposing Li and B to hydrogen gas at high temperatures 700∘C and at high pressures (150 bar) [1]. The synthesis can be facilitated by using intermetallic Li-B compounds as starting material. We have shown by in-situ neutron powder diffraction that starting from an intermetallic Li-B compound LiBD4 can be synthesized at 180bar at a temperature of 350∘C, which is about 350∘C lower than the temperature required for the direct synthesis [1,2].
The experiment was carried out at the powder diffraction instrument E6 of the Hahn Meitner Institut. Support by A. Hoser and N. Stüsser is gratefully acknowledged. Financial support from the 6th Framework Program of the European Commission (NESSHY Contract No.: 518271) and the Swiss Federal Office of Energy is acknowledged.
O. Friedrichs et al., Acta Materialia, in press
D. Goerrig, Deutsches Patent; Auslegungsschrift (1960)