▎ 摘　　要

NOVELTY - A carbon-coated silica-graphene composite preparing method involves preparing carbon precursor coated silica particles, mixing the coated silica particles with graphite oxide uniformly at hydrothermal high temperature, and heating the mixture to obtain carbon-coated carbon-coated silica-graphene composite. USE - Method for preparing carbon-coated silica-graphene composite that is utilized in a cathode material of a lithium-ion battery. ADVANTAGE - The method enables preparing the carbon-coated silica-graphene composite in a simple and environment-friendly manner with nano-size, low cost and high dispersibility, reducing valid volume change in charging and discharging process, and improving electron transmission efficiency on surface of carbon coating layer and graphene material.