In Situ Formation of TiB2Nanoparticles for Enhanced Dehydrogenation/Hydrogenation Reaction Kinetics of LiBH4–MgH2as a Reversible Solid-State Hydrogen Storage Composite System

To enhance the dehydrogenation/rehydrogenation kinetic behavior of the LiBH4–MgH2composite system, TiF4is used as an additive. The effect of this additive on the hydride composite system has been studied by means of laboratory and advanced synchrotron techniques. Investigations on the synthesis and mechanism upon hydrogen interaction show that the addition of TiF4to the LiBH4–MgH2composite system during the milling procedure leads to the in situ formation of well-distributed nanosized TiB2particles. These TiB2nanoparticles act as nucleation agents for the formation of MgB2upon dehydrogenation process of the hydride composite system. The effect of TiB2nanoparticles is maintained upon cycling.