制粉工艺对微晶石墨结构与电性能的影响

Effect of milling means on structure and electrochemical properties of natural graphite

采用普通的粉碎和风选技术得到的天然石墨颗粒不规则,而且表面粘满了碎屑。采用特殊的粉碎分级技术得到表面圆滑、光洁的颗粒。这种分级方法对提高天然石墨作为锂离子二次电池材料时的性能,尤其是不可逆容量的改善有重要的意义。

Natural graphite particles prepared by general pulverization ways had irregular morphology, and their surfaces were covered with minute particles. Modified by special pulverization and size classification, the graphite particles had smooth surface without minute particles and became cobble-shaped. By this preparation method, the electrochemical properties of the natural graphite could be improved, especially the irreversible capacity could be reduced.