Impregnation method for the synthesis of Li–N–H systems

Reversible hydrogen storage in titanium-catalyzed LiAlH4–LiBH4 system

“…Storing hydrogen in solid hydride is attractive because it offers a volumetric hydrogen density greater than that of either compressed gas or liquid hydrogen storage, without high pressure containment or cryogenic tanks [3]. In the past few years, complex hydrides such as alanates (AlH 4 − ), amides (NH 2 − ), and borohydrides (BH 4 − ) have attracted considerable attention, as they inevitably provide a quite high hydrogen storage capacity [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. LiBH 4 is one of the most promising solid-state materials for hydrogen storage, due to its high hydrogen storage capacity of 18.5 wt.%.…”

Progress in improving thermodynamics and kinetics of new hydrogen storage materials

“…Therefore, the latter reaction [Eq. (6)] is still considered to be suitable for hydrogen storage and has been investigated extensively [43][44][45][46][47][48][49][50]:…”

Amides, Imides and Mixtures

“…In order to obtain bulk morphologies, even after repeated hydrogenation and dehydrogenation reactions, for the Li-N-H system, Hao et al [105] demonstrated the feasibility of an impregnation method for the synthesis of Li 2 NH (Li-imide) and LiNH 2 (Li-amide) for application in practical hydrogen storage. As shown in Figure 6.14, a metallic Li foil with 99.9% purity was placed on top of the Ni foam installed in a steel reaction cell with diameter 15 mm, and then heated to 500 C for 4 h in an Ar atmosphere.…”

“…14 Schematic drawing of the set-up for the impregnation method. A bellows-shaped Ni foil was used as a spacer to avoid any direct contact between the Ni foam and the bottom of the crucible[105]. A bellows-shaped Ni foil was used as a spacer to avoid any direct contact between the Ni foam and the bottom of the crucible[105].…”