▎ 摘　　要

NOVELTY - Composite two-dimensional micron-sized silicon wafer comprises two-dimensional micron-sized silicon wafer, titanium dioxide, and graphene oxide. The titanium dioxide is coated on surface of two-dimensional micron-sized silicon wafer. The graphene oxide is coated on surface of titanium dioxide. The composite two-dimensional micron-sized silicon wafer is used as cathode material of lithium ion battery. USE - Composite two-dimensional micron-sized silicon wafer. ADVANTAGE - The product solves the problem of low cycle stability, low cycle number upper limit, poor conductivity, poor rate performance, and easy generation of lithium dendrites during high-power charging which can cause thermal runaway problems in lithium batteries. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of composite two-dimensional micron-sized silicon wafer comprising using tetraethyl orthosilicate as raw material, using sodium chloride template method to obtain micron-sized silica chips, using micron-sized silica chips as raw material, obtaining two-dimensional micron-sized silica chips by magnesium thermal reduction method, using two-dimensional micron-scale silicon wafer and isopropyl titanate as raw materials, obtaining two-dimensional micron-scale silicon wafer/titanium dioxide composite material through sol-gel method, adding two-dimensional micron-scale silicon wafer/titanium dioxide composite material to graphene oxide solution for ultrasonic mixing, filtering, drying to obtain two-dimensional micron-scale silicon wafer/titanium dioxide/graphene oxide composite material, mixing two-dimensional micron silicon wafer/titanium dioxide/graphene oxide composite material and pore-forming agent in heating device, treating with inert gas, and calcining at high temperature.