Magnesium and magnesium alloy hydrides

New FCC Mg–Zr and Mg–Zr–ti deuterides obtained by reactive milling

“…However, the high thermal stability and slow kinetics of its rutile-type structure significantly hinder its widespread use in commercial energy storage systems. Many factors such as a chemical composition [2][3][4] , addition of catalytic species [5][6][7][8][9][10] , processing technologies 5,[11][12][13][14] and microstructural parameters, particularly grain size 6,[15][16][17] , have an effect on the hydrogen storage capacity, kinetics and/or thermodynamics of Mg-based intermetallic compounds. Conventional crystalline alloys often suffer from relatively slow hydrogen sorption kinetics even at high temperatures, while nanocrystalline and amorphous materials exhibit much faster kinetics at lower temperatures, as their large number of interfaces, defects and grain boundaries, provide easy pathways for hydrogen diffusion [18][19][20][21] .…”

Catalytic Effect of Nb2O5 in MgH2-Nb2O5 Ball-Milled Composites

“…Hydrogen is a promising alternative energy carrier that has been highly regarded because of its prominent advantages such as high energy density (142 MJ/kg [1]), great variety of potential sources, light weight, and environmental friendliness. Besides the application of hydrogen energy, many kinds of hydrogen storage materials have been studied in the past decades, such as lithium compounds [2,3], ammonia borane [4,5], as well as the hydrides of light metals [6,7]. Magnesium hydride is one of promising candidates for hydrogen storage materials due to its high hydrogen capacity (7.6 wt%), which fulfills the ultimate target of 7.5 wt% [8] set by the Department of Energy, USA.…”

Electrochemical and Optical Properties of Magnesium-Alloy Hydrides Reviewed

“…An advantage of this electrochemical method is that the hydrogen content can be precisely calculated from the amount of charge (Q) that is used during electrochemical (de)hydrogenation. Q can be quantified by integrating the current (I) with respect to time (t) according to equation (8) …”

“…Table 1. Hydrogen content and energy density in various media [8]. In comparison to the other metal-hydrides, MgH 2 has a relatively high energy density of 9.92 MJ/kg [8].…”

“…Hydrogen content and energy density in various media [8]. In comparison to the other metal-hydrides, MgH 2 has a relatively high energy density of 9.92 MJ/kg [8]. Although Mg fulfills major requirements for serving as a novel hydrogen storage material, it cannot be used in practical applications due to its poor (de)sorption kinetics and high (de)hydrogenation reaction temperature (350-400 °C).…”