Effects of Stoichiometry on the H -Storage Properties of Mg(NH ) -LiH-LiBH Tri-Component Systems.

The hydrogen desorption pathways and storage properties of 2 Mg(NH ) -3 LiH-xLiBH samples (x=0, 1, 2, and 4) were investigated systematically by a combination of pressure composition isotherm (PCI), differential scanning calorimetric (DSC), and volumetric release methods. Experimental results showed that the desorption peak temperatures of 2 Mg(NH ) -3 LiH-xLiBH samples were approximately 10-15 °C lower than that of 2 Mg(NH ) -3 LiH. The 2 Mg(NH ) -3 LiH-4 LiBH composite in particular began to release hydrogen at 90 °C, thereby exhibiting superior dehydrogenation performance.