Metal hydride electrodes prepared by mechanical alloying of ZrV2-type materials

摘要

The structural and electrochemicalproperties of a range of alloys, including: ZrV2 andZrV2/Ni (10wt%Ni), which have the cubic C15 typestructure and Zr0.35Ti0.65V0.85Cr0.26Ni1.30, whichhas the hexagonal C14 type structure, have beeninvestigated. These alloys have been prepared usingmechanical alloying (MA) followed by annealing. Theamorphous phase forms directly from the startingmixture of the elements, without other phase formation.Heating the MA samples at 1070K for 1h resulted in thecreation of ordered ZrV2-type alloys. In mechanicallyalloyed, amorphous ZrV2, ZrV2/Ni materials andZr0.35Ti0.65V0.85Cr0.26Ni1.30 material dischargecapacities of 0,38 and 90 mAhg-1 were obtained,respectively. Annealed nanocrystalline powders havegreater capacities than the amorphous parent materials.