Preparation method of lithium ion battery negative electrode material

The invention discloses a lithium ion battery negative electrode material preparation method, which comprises: loading a natural spherical graphite waste material into a coating machine, stirring, heating, and spraying a solution A; cooling, and then continuously spraying the solution B; after cooling to normal temperature, taking out the material, and performing compression molding; carrying out graphitization treatment on the formed material, and then scattering and screening to obtain the lithium ion battery negative electrode material. The method is simple and easy to implement, the natural spherical graphite waste is utilized, and the obtained negative electrode material is high in specific capacity, low in expansion rate and wide in market prospect. 本发明公开了一种锂离子电池负极材料的制备方法，包括以下步骤：将天然球形石墨废料装入包覆机中，搅拌升温，然后喷入溶液A；降温，然后继续喷入溶液B；冷却至常温后，取出物料，然后压制成型；将成型物料进行石墨化处理，然后经过打散、筛分，即可得到锂离子电池负极材料。本发明简单易行，实现了天然球形石墨废料的利用，所得负极材料比容量高、膨胀率低，市场前景广阔。