1. A method for making shavings of silicon-based negative electrode material, which is characterized in that silicon cutting waste is mixed with a structural stabilizer, and then ball milled and shaped to obtain a shaped material; the structural stabilizer is an alkali Chlorides of metals and/or alkaline earth metals; the silicon cutting waste contains metal components.
2. Physically modify the plastic material in a non-oxidizing atmosphere at a temperature of 600~1000℃.
3. Wash and dry the physically modified materials, then chemically modify them with a chemical modifier, and then wash and dry them again to obtain the nano-silicon negative electrode for lithium ion batteries. Material.