Preparation Technology of Silicon-Carbon Composite Anode Material Based on Expanded Graphite for Lithium-Ion Battery for Vehicles

摘要

A concept of silicon-rich expanded graphite was obtained in this paper. The silicon-carbon composite material was prepared via ball-milling of silicon-rich expanded graphite and commercialized graphite material. The composite material has both the high capacity of silicon and the stable cycleability of graphite. In addition, the preparation process is simple and suitable for industrial production. In this research, we got the silicon-carbon composite material with a reversible capacity with the capacity more than 700 mAhg~(-1) for Li-ion batteries for electric vehicles.