Electrochemical properties of nanocrystalline Mg2Ni-type alloys prepared by mechanical alloying

Electrochemical hydrogen storage of ball-milled Mg-rich Mg–Nd alloy with Ni powders

“…4, the anodic oxidation peaks of hydrogen can be found in the potential range of about −0.60 to −0.55 V (versus Hg/HgO). The cathodic adsorption peak of hydrogen is observed around −0.95 V (versus Hg/HgO), similar to that of nanocrystalline Mg 1.9 Ti 0.05 Zr 0.05 Ni alloy [19]. The oxidation peak area of ball-milled Mg 5 Nd 41 -200 wt.% Ni composite is larger, contributed to the higher electrochemical hydrogen storage capacity.…”

Hydrogen sorption properties of ternary intermetallic Mg–(Ir,Rh,Pd)–Si compounds

“…This value is lower than those measured for instance for Mg 2 Ni or other Mg-Ni compounds, but comparable to the capacity of the above mentioned compounds after the first 2-3 cycles [13][14][15]. The capacities in the present study are close to those of our previous work on the electrochemical behavior of nanocrystalline/amorphous Mg 2 Ni-based alloys [7]. It is worth noting that generally substantially higher capacities are obtained for the amorphous compared to the nanocrystalline Mg-Ni alloys.…”

“…Mg 2 Ni, for instance, is one of the highest hydrogen capacity compounds, but its hydriding/dehydriding kinetics is slow and the hydrogenation temperature is too high for most of the practical applications [6]. Another drawback, with respect to electrochemical applications, is its very low corrosion stability in alkaline electrolytes [7].…”

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

“…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]. A large amount * Corresponding author at: Central Laboratory of Electrochemical Power Sources, Bulgarian Academy of Sciences, Sofia, Bulgaria.…”