Reversible hydrogen storage properties of LiBH4 combined with hydrogenated Mg11CeNi alloy

The hydrogenated Mg11CeNi alloy was utilized as a destabilizer to combine with LiBH4 in this paper. It was found that thermal dehydrogenation of the LiBH4/Mg11CeNi hydride system with a molar ratio of 17:2.5 proceeds in two-step reactions: one initiates at around 280 degrees C with about 4.0 wt.% of hydrogen released from MgH2 and Mg2NiH4, and the other occurs in the temperature range 350-425 degrees C that can be assigned to the decomposition of LiBH4 co-destabilized by Mg2Ni, CeH2 and Mg. These two-step dehydrogenation reactions for the LiBH4/Mg11CeNi hydride system are partially reversible, and about 4.9 wt.% of hydrogen can be reloaded at 400 degrees C under an initial hydrogen pressure of 9 MPa. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.