Improvement on the Cycle Life of Mechanically Alloyed Mg-based Alloy Prepared by Element Substitution

摘要

The present invention relates to a method for improving electrode life of a high-capacity magnesium-based alloy having an improved electrode surface by alloy element substitution. More specifically, Ni / MH (Ni / MH: Mg-based hydrogen storage alloy) is one of the anode materials for secondary batteries, and the hydrogen storage capacity is 636mAh / g. The present invention relates to a method for improving the life of a magnesium-containing alloy having poor cycle life characteristics during discharge.;Mg _1.0-xy Ti _x Zr _y Ni _1.0 (x = 0.01) using an amorphous alloy such as Ti or Zr, which is an element that forms a passive oxide film well in the preparation of an alloy, in an electrode material of an Mg-Ni based hydrogen storage alloy -0.3, y = 0.01-0.2), and mechanically alloyed. Accordingly, the electrode of the present invention provides a method for improving electrode life of an alloy containing high capacity magnesium by alloy element substitution, which can greatly improve the life of Mg-Ni alloys in which degradation occurs rapidly in the electrolyte.