Desorption characteristics of mechanically and chemically modified LiNH2 and (LiNH2+LiH)

Comparisons between MgH2- and LiH-containing systems for hydrogen storage applications

“…it has been shown that reaction (11) can proceed at room temperature after high-energy ball milling [16], and so can reaction (12) [29,37]. For reaction (13) it can take place at temperatures above 175 1C [12,29,32,37].…”

“…Among these systems, hydrogen storage materials, especially light metal hydrides, amides, and imides have been investigated extensively because light metal hydrides, amides, and imides have the potential of being reversible for hydrogen refueling as well as being compact due to the presence of light elements. Following the first report by Chen et al [1] in 2002, studies on hydrogen sorption and desorption behavior and mechanisms of the lithium amide (LiNH 2 ) and lithium hydride (LiH) mixture have been very intensive [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. It is generally agreed that the dehydriding reaction of this system can be expressed as [1] …”

“…It has been shown that reaction (3) is ultrafast and can take place in the order of microseconds [4], whereas reaction (2) is slow and proceeds in minutes [16]. In spite of the high storage capacity, the lithium imide/ amide/hydride system currently requires relatively high operating temperatures ð$280 CÞ to obtain 1 atm of hydrogen sorption and desorption pressure [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. In order to increase the equilibrium pressure and lower the sorption and desorption temperatures, many studies have focused on destabilization of lithium amide through partial substitution of lithium by magnesium [7,8,12,[17][18][19][20][21][22][23][24][25].…”

Recent Progress and New Perspectives on Metal Amide and Imide Systems for Solid-State Hydrogen Storage

“…Another strategy adopted to improve the kinetic and thermodynamic properties of the Li-N-H system is represented by the addition of a second element [16,17] or compounds [16,[18][19][20][21]. Nayebossadri [17] reported that elemental Si and Al can effectively improve the dehydrogenation rate of the Li-N-H system.…”

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

“…A candidate material is the Li-N-H system comprising Li 2 NH (Li-imide) and LiNH 2 (Li-amide) as well as their related hydrides [5][6][7][8][9][10][11]. Li 2 NH and LiNH 2 can be synthesized by the hydrogenation of Li 3 N according to the following reactions: Li 3 N + 2H 2 → Li 2 NH + LiH + H 2 → LiNH 2 + 2LiH.…”