Reversible hydrogen storage properties of LiBH4 combined with hydrogenated Mg11CeNi alloy

Abstract The hydrogenated Mg 11 CeNi alloy was utilized as a destabilizer to combine with LiBH 4 in this paper. It was found that thermal dehydrogenation of the LiBH 4 /Mg 11 CeNi hydride system with a molar ratio of 17:2.5 proceeds in two-step reactions: one initiates at around 280 °C with about 4.0 wt.% of hydrogen released from MgH 2 and Mg 2 NiH 4 , and the other occurs in the temperature range 350–425 °C that can be assigned to the decomposition of LiBH 4 co-destabilized by Mg 2 Ni, CeH 2 and Mg. These two-step dehydrogenation reactions for the LiBH 4 /Mg 11 CeNi hydride system are partially reversible, and about 4.9 wt.% of hydrogen can be reloaded at 400 °C under an initial hydrogen pressure of 9 MPa.