A MECHANICAL MODIFICATION METHOD OF BALL MILLING FOR NATURAL GRAPHITE AND THE MODIFIED NATURAL GRAPHITE ANODE MATERIAL

摘要

The present invention relates to a mechanical modification method of ball milling for natural graphite and negative electrode material of modified natural graphite. The method comprises: putting a milling ball, a milling medium, and a raw material of graphite powder according to a mass ratio of (0.5-20):(0.1-10):1 in a milling tank; performing ball milling for 2-120 minutes according to a rotation speed of not more than 600 r/min in a ball milling facility; and removing and drying the milling medium. The method of the present invention can achieve the aims of improving initial discharging efficiency of natural graphite, reducing the irreversible capacity, and improving the circulation performance of natural graphite through a low-cost ball-milling mechanical modification technology.