▎ 摘　　要

NOVELTY - Preparing a silicon-based cathode material, comprising: taking silicon oxide as a raw material, performing surface modification treatment on the silicon oxide raw material, and then combining the surface-modified silicon oxide with a few layers of graphene to prepare silicon-based capacity unit, and then mixing the silicon-based capacity unit and the carbon-based material. USE - The method is useful for preparing silicon-based cathode material. ADVANTAGE - The method can improve the reversible capacity and coulomb efficiency of the lithium ion battery, and reduce the volume expansion. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for (1) silicon-based cathode material of lithium ion battery; (2) cathode of lithium ion battery, comprising the silicon-based cathode material; and (3) lithium ion battery, comprising a cathode.