Addition of 3d-metals with formation of nanocomposites as a way to improve the hydrogenation characteristics of Mg2Ni

Hydrogen storage in magnesium–metal mixtures: Reversibility, kinetic aspects and phase analysis

“…In these samples also the two hydrides TiH 1.924 (in agreement with the findings of Grigorova et al[23]) and TiH 1.971 form upon hydrogenation.…”

Hydrogen storage in Mg–10at.% LaNi5 nanocomposites, synthesized by ball milling at different conditions

“…For coarse-grained polycrystalline MgH 2 it could take as long as several hours to decompose at 300-350 • C. Size reduction gives better results [3,4], but is often not sufficient and comes with the cost of sacrificing capacity for kinetics. Therefore research on catalyst additions [5][6][7], composites [8][9][10][11][12] and alloys [13,14] based on Mg (especially synthesized by reactive ball milling) has been intensively carried out. In our recent study [15] it was shown that in addition to the grain size, the particle reduction (to less than 1 m) improves the hydrogen sorption kinetics of nanocrystalline Mg/MgH 2 powders.…”

Influence of tin on the electrochemical and gas phase hydrogen sorption in Mg2−xSnxNi (x=0, 0.1, 0.3)

“…Although during the last years the work on the Mg 2 Nibased alloys for hydrogen storage was very intensive [1][2][3][4][5][6][7][8] the interest to these materials still continues due to the possibility their hydriding properties to be improved and optimized with respect to some specific applications. The hydriding properties of Mg 2 Ni based alloys depend on the microstructure, type and amount of the alloying elements.…”

“…Mg substitution by Ti in Mg 2 Ni destabilizes the hydride phase and improves the kinetics [6]. It has recently been shown that the presence of a second hydride forming 3D element (Ti) in the Mg 2 Ni-V composite leads to an enhanced absorption capacity and improved hydriding kinetics [4]. Reducing the particle and grain sizes of Mg-based alloys improves the hydrogen capacity and hydriding/dehydriding kinetics [5,9,[14][15][16][17][18][19].…”