Microstructural evolution and improved hydrogen storage properties for the Li3N-MgH2 system by addition of LiNH2 during the hydrogenation/dehydrogenation

The hydrogenation-dehydrogenation process of Li3N-MgH2-2LiNH2 sample is described as the following schematic. It includes 'The primary materials', 'The as-prepared sample', 'The hydride' and 'The dehydride'. The hydrogenation-dehydrogenation mechanisms obey the following reactions: Li3N + MgH2 + 2LiNH2 → LiMgN + 2LiH + 2LiNH2 LiMgN + 2LiH + 2LiNH2 + 2H2 → LiNH2 + Mg(NH2)2 + 4LiHLiNH2 + Mg(NH2)2 + 4LiH ↔ Li2NH + Li2Mg(NH)2 + LiH + 3H2.190