| 摘要 |
Provided is a method for fabricating a lithium titanate silicon-based composite negative-electrode material; in the method, a resinous carbon precursor is used to coat nano-silicon; the resinous precursor is carbonized to form a porous structure carbon, which is used as a carrier on which to secure nano-silicon, effectively mitigating the volume expansion of the silicon; then, after compositing with lithium titanate, bitumen coating modification is performed, thus resolving the shortcomings of the specific surface area of the resinous material being excessively large and the capacity of the lithium titanate being low; a large and irreversible loss of capacity is prevented, improving the gram specific capacity of the material; the material ultimately obtained has the advantages of a low specific surface area, good processability, and high gram specific capacity and a long cycle. At the same time, the method is simple to perform, easy to control, has low production costs, and is suitable for industrial production. |
