Berlin 2008 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 39: SYM Hydrogen in Materials: New Developments III
MM 39.5: Vortrag
Donnerstag, 28. Februar 2008, 15:40–16:00, H 1058
Hydrogen release of Mg(BH4)2 under helium and hydrogen backpressure — •Wiebke Lohstroh, Nobuko Hanada, Christoph Frommen, and Maximilian Fichtner — Institut für Nanotechnologie, Forschungszentrum Karlsruhe GmbH, Postfach 3640, 76021 Karlsruhe
Mg(BH4)2 is one of the potential materials to be used in solid state hydrogen storage systems due to its high capacity of 14.9 wt% H2 and a favourable reaction enthalpy. However, experimentally, hydrogen is only released at temperatures above 300 ∘C. Depending on the surrounding gas atmosphere (helium or hydrogen) and the applied backpressure several decomposition steps are observed. We will present thermal analysis and structural investigations at various stages of the decomposition and the hydrogen release mechanism will be discussed.