▎ 摘　　要

NOVELTY - A layered self-assembled silicon dioxide doped carbon/graphene composite material preparing method involves weighing a certain proportion of sol and sucrose and dissolving in deionized water, stirring and sonicating to obtain transparent bluish solution. Graphite oxide is weighed and the micro-blue solution is added, and ultrasonically dispersed to obtain a mixed solution. The mixed solution is placed in a hydrothermal autoclave and cooled, deionized water is added and the product is washed and dried. The dried product is placed in a furnace and heated to obtain the finished product. USE - Method for preparing a layered self-assembled silicon dioxide doped carbon/graphene composite material that is utilized in a lithium ion secondary battery cathode material. ADVANTAGE - The method enables preparing the composite material in a simple and economical manner with high conductivity, good shape, stable structure, high discharge capacity, strong conductivity, good cycling performance and wide application prospect. DETAILED DESCRIPTION - A layered self-assembled silicon dioxide doped carbon/graphene composite material preparing method involves weighing a certain proportion of sol and sucrose and dissolving in deionized water, stirring and sonicating to obtain transparent bluish solution. Graphite oxide is weighed and the micro-blue solution is added, and ultrasonically dispersed to obtain a mixed solution. The mixed solution is placed in a hydrothermal autoclave and reacted at 180-200 degrees C for 10-15 hours, and cooled to room temperature, deionized water is added and the product is washed with ethanol and dried. The dried product is placed in a high temperature furnace under nitrogen atmosphere and heated to obtain the finished product.