Prepared By Mechanical Alloying Of Mg-based High-capacity Hydrogen Storage Alloy Electrode Anode Material

A study was made of the Magnesium-based alloys synthesized by high-energy ball milling that is used hydrogen storage as the negative electrode materials. Different constructers of Mg-Ni binary and Mg1-xMxNi ternary alloys were prepared by high-energy ball milling. Then attention focus on the charge and discharge potential capacity and curves of Mg-Ni binary and Mg1-xMxNi ternary alloys .The main conclusions can be drawn as follows:1. The ball-milling of the alloy with Mg, Ni powder results in an amorphous or nanocrystalline phase. The effect of Nickel and ball-milling conditions synthesized different alloy phase: the composite phase with nanocrystalline Mg2Ni, Mg and Ni; only nanocrystalline Mg2Ni; or Mg-Ni amorphous alloy. Partial replacement of Mg in MgNi by the elements studied does not change the nanocrystalline and amorphous major structure.2. Mg-Ni binary and Mg1-xMxNi ternary alloys prepared by high-energy ball milling has a large discharge capacity and easy be kinetic at room temperature. In all Mg-Ni binary mechanical alloying (AM), amorphous MgNi showed the best Electrochemical characteristics that the highest discharge capacity is 507.5mAh/g . But the partial replacement of Mg in MgNi by Zr elements improved its Electrochemical characteristics. Over all amorphous (Mg2Ni)0.99(Zr10Ni7)0.01 +20%Ni's discharge capacity reached 600 mAh/g.