Hydrogen-storage properties of amorphous Mg–Ni–Nd alloys

Nanocrystallization and hydriding properties of amorphous melt-spun Mg65Cu25Nd10 alloy

“…5 shows the rate of hydrogen absorption for the Mg 65 Cu 25 Nd 10 alloy at three different microstructural states: amorphous, partially crystalline (annealed at 210 • C) and completely crystallized (annealed at 335 • C). As already shown in our recent studies [16] the amorphous alloy exhibits very fast initial hydrogenation kinetics due to the rapid diffusion of hydrogen and has the maximum hydrogen capacity of 3.2 wt.%. The fully crystallized Mg 65 Cu 25 Nd 10 alloy shows the lowest initial hydrogenation rate as compared to the other two microstructural states.…”

“…3, 4 and 8). According to the results of Orimo and Fujii [19] reported and our previous studied [16], ␣-Mg and Cu 5 Nd cannot reacted with H at room temperature, but Mg 2 Cu can do. Therefore, the formation of ␣-Mg and Cu 5 Nd phases leads to the decrease amount of hydrogen absorbed in the partially crystalline and completely crystallized alloys.…”

“…Our recent investigations [16,17] demonstrated the effect of microstructure, composition and phase composition on the hydrogen storage capacity as well as on the kinetics of hydrogen absorption. The best hydriding properties were found in the amorphous (Mg 60 Ni 25 ) 90 Nd 10 alloy with maximum hydrogen capacity of 4.2 wt.%.…”

The effect of solidification rate on microstructural evolution of a melt-spun Mg–20Ni–8Mm hydrogen storage alloy

“…The best hydriding properties were obtained in the nanocrystalline/amorphous Mg 75 Ni 20 Mm 5 alloy with a maximum hydrogen capacity of 4.0 wt%. Huang et al [20,21] studied the nanocrystallization and hydrogenation properties of amorphous Mg 65 Cu 25 Nd 10 prepared by melt spinning. They reported that amorphous Mg 65 Cu 25 Nd 10 showed faster initial hydrogenation rate and higher hydrogen capacity (3.2 wt%) than partially crystalline and completely crystallized microstructural states.…”

Electrochemical characteristics of amorphous MgTi x Ni (x = 0, 0.1, and 0.2) hydrogen storage alloys

“…4, without any activation, the alloys could come up to the maximum discharge capacity in the first cycle. This is because the amorphous alloy exhibits fast initial hydrogenation kinetics because of the rapid diffusion of hydrogen, which is beneficial to hydriding/dehydriding reaction [15]. Though the initial discharge capacity fades with increasing Ti content, the cyclic performance is improved markedly.…”