| 摘要 |
Provided in the present invention is a preparation method for a lithium-ion battery negative electrode material. The negative electrode material is a composite negative electrode material having a core-shell structure consisting of lithium titanate as the inner layer and a composite cladding layer formed jointly by asphalt, a resin, and tin powder as the outer layer. The composite material prepared per the present method retains the high specific capacity characteristic of tin, at the same time, provides lithium titanate with a modification effect, increases the cycle stability of the material as a whole, thus increasing the energy density of the lithium-ion battery negative electrode material, allowing the negative material to be provided with a specific capacity higher than that of a common carbon negative electrode material in commercially available lithium-ion batteries, and satisfying increasing energy density requirements that various portable electrical device have on batteries. |
