Electrochemical hydrogen storage characteristics of nanocrystalline Mg20Ni10−xCux (x=0–4) alloys prepared by melt-spinning

High-Pressure Torsion of Non-Equilibrium Hydrogen Storage Materials: A Review

“…Besides severe plastic deformation techniques (HEBM and HPT), alternative methods via rapid quenching, such as melt spinning and copper mould casting are also available to produce H-storage magnesium and magnesium-nickel based alloys. The as-quenched non-equilibrium alloy can either contain several fully crystalline phases [97][98][99], a supersaturated solid solution [100], partial amorphous structure [101], or monolithic amorphous glassy phase [102][103][104].…”

“…In the rapidly quenched Mg-Ni-Mm (Mm=Ce, La) system the precipitation of the Mg 12 Mm intermetallic phase preferentially occurs at the Mg grain boundaries providing pathways for enhanced hydrogen diffusion [108]. In order to further improve the sorption behaviour of as-spun nanocrystalline Mg-Ni-based alloys, Ni was partially substituted by Cu [99] or Co [109]. As was demonstrated, the applied melt spinning rate has a significant influence on the sorption properties of these alloys [108,110].…”

Gaseous and electrochemical hydrogen storage kinetics of nanocrystalline Mg2Ni-type alloy prepared by rapid quenching

“…Our previous work has testified that the substitution of Co for Ni and the melt spinning process significantly ameliorated the hydriding and dehydriding kinetics of the Mg 2 Ni-type alloys [10,11]. Therefore, it is highly desirable to investigate the influence of substituting Ni with Cu on the hydrogen storage kinetics of Mg 2 Nitype alloys.…”

Effects of compaction pressure on the electrochemical properties of Mm0.3Ml0.7Ni3.55Co0.75Mn0.4Al0.3 metal hydride electrodes

“…The hydrogen storage alloys used as the main negative materials of Ni/MH batteries have been extensively studied in recent decades, and several series of hydrogen storage alloys have been developed, including AB 5 -type alloys, AB 2 -type alloys, Mg-based alloys and AB 3 -type alloys, etc. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. On the other hand, the parameters of the metal hydride electrode preparation, such as the particle sizes of the hydrogen storage alloys, conductive materials, the mass ratios of conductive materials to hydrogen storage alloys, the compaction pressure and the pressure-holding time during electrode preparation, are also of great importance to improve electrochemical properties and reduce the total weight and the cost of the negative electrodes.…”