| 摘要 |
The invention discloses a lithium ion battery cathode material and a preparation method thereof. The preparation method adopts graphite micropowder as a core material and comprises the following steps of coating at least one carbon compound on the surface of the core material to form a first coating layer, carrying out a secondary coating process by utilizing at least one carbon compound to form a second coating layer, and carrying out graphitization processing to form a graphite material with a shell-core structure. In the invention, a novel cathode material is synthesized through a two-step granulation method, and can reduce or avoid that a lithium ion battery produces a lithium precipitating phenomenon when the lithium ion battery is charged and discharged at low temperature, thus reduce irreversible loss which belongs to Li <+> and is produced in a lithium ion battery charging-discharging process at low temperature. |
