Study the Effect of NiF2 Additive on the Hydrogen Sorption Properties of 4MgH2+Li3AlH6 Destabilized System

The hydrogen storage properties and the reaction mechanism of the destabilized system MgH2-Li3AIH6 with additive of NiF2 have been studied in this research. Temperature-programmed-desorption results showed that the addition of the catalyst to the 4MgH2 + Li3AIH6 composite system reduced the onset desorption temperature and enhanced the kinetic performance compared to undoped composite. These results suggest that the NiF2 component in the doped composite could play a catalytic role through the formations of active species of LiF and Al4Ni3 that are formed during the heating process which may promote the interaction of MgH2 and Li3AlH6 and thus further improve the hydrogen sorption properties of the MgH2 + Li3AIH6 system.