Hydriding properties of nanocrystalline Mg2−xMxNi alloys synthesized by mechanical alloying (M=Mn, Al)

The Preparation and Hydrogen Storage Performances of Nanocrystalline and Amorphous Mg2Ni-Type Alloys

“…15 that the HRD value (i=100 mA/g) of the Co4 alloy is enhanced from 60.3 to 76.0% by increasing the spinning rate from 0 to 30 m/s, and that of the as-spun (20 m/s) alloys is markedly increased from 63.54 to 75.32% by rising Co content from 0 to 4. It has come to light clearly that high rate discharge ability (HRD) basically depends on the charge transfer at the alloy-electrolyte interface and the hydrogen diffusion process from the interior of the bulk to the surface of alloy particle [29]. The substitution of Co for Ni notably enhances the HRD values of the alloys, to be attributed to an impactful positive action of Co substitution on the hydrogen diffusion in the alloy.…”

“…The substitution of Co for Ni notably enhances the HRD values of the alloys, to be attributed to an impactful positive action of Co substitution on the hydrogen diffusion in the alloy. Furthermore, Co substitution accelerates the formation of a concentrated metallic Ni layer on the surface of the alloy electrode which is highly beneficial to enhance the electrochemical catalytic property and to improve the reaction rate of hydrogen [29]. The hydrogen diffusion coefficients in the as-cast and spun alloys were measured using the potential step technique.…”

Nanostructured Hydrogen Storage Materials Synthesized by Mechanical Alloying

“…These types of hydrogen-forming compound have recently proven to be very attractive as negative electrode material in rechargeable Ni-MH batteries [17][18][19]. Magnesiumbased hydrogen storage alloys have also been considered as possible candidates for electrodes in Ni-MH batteries [6,25,26]. TiFe and ZrV 2 alloys crystallize in the cubic CsCl and MgCu 2 structures, and at room temperature absorb up to 2 H per formula unit (f.u.)…”

Microstructure and Electrochemical Hydrogen Storage Properties of Ball-milled mgxni100-x+5wt %tif3 (x=50, 60, 70) Composite

“…The addition of Pd nanoparticle in the process of fabricating MgNi alloy through applying ball -milled technology remarkably ameliorated the absorbing/desorbing hydrogen capacity and kinetics performance [7]. Gasiorowski synthesized Mg 2-x M x Ni (M=Mn, Al) alloy by MA, the electrochemical and kinetic property of it has been improved markedly [8]. The formation of MgF 2 in the process of ball milling MgH 2 using transition metal fluoride can meliorate the hydrogen releasing capacity effectually [9,10].…”