| Title |
Hydrogenation Study of Mg-based Alloys by Mechanical Grinding Reaction for Hydrogen Storage of Fuel Cell |
| Authors |
Ho-Sung Kim ; Hee-Seok Suh ; Jae-Sang Cha |
| Keywords |
Ni-MH battery ; Mg₂Ni based ; Hydrogen Storage Alloy ; Single Spherical Particle ; Microelectrode |
| Abstract |
The effects of mechanical grinding(MG) treatment on the hydrogen storage of Mg₂Ni alloy and Mg₂Ni composite alloy(Mg₂Ni+graphite) were investigated by pressure-composition-temperature(PCT) measurement, the micro-electrode technique of electrochemistry and etc, in which PCT was measured at high temperature(around 300[℃]) of gas phase and a carbon-filament micro-electrode for electrochemical evaluation was manipulated to make electrical contact with the particle in 1M KOH aqueous solution. It was found that the hydrogenation properties of Mg₂Ni and graphite composite particle were greatly improved by the mechanical grinding treatment by which the Mg₂Ni and graphite composite alloys could be changed into microstructure and nano-level particles. namely; the hydrogen dissociation pressure of PCT measurement was decreased from 0.55[㎫] to 0.42[㎫] and hydrogenation peaks by micro-electrode were also observed more clearly on the same sample. |