▎ 摘　　要

NOVELTY - Preparation of copper oxide/graphene composite material involves weighing copper salt, precipitator and deionized water, adding the weighed raw material to a reactor with a magnetic stirring device, reacting at a given temperature for a period of time, adding a certain amount of graphene and a reducing agent to the solution, stirring uniformly, transferring the solution to the hydrothermal kettle for hydrothermal reaction, cooling the reaction kettle to room temperature, filtering, respectively washing with water and absolute ethanol, and vacuum drying. USE - Preparation method of copper oxide/graphene composite material used for super capacitor electrode material, lithium ion battery electrode material (claimed), photosensitive material, heterogeneous catalysis, photoelectric catalysis and solar battery multiple fields. Uses include but are not limited to semiconductor, photo-catalysis, solar battery, lithium battery, sensor and electrochemical detection. ADVANTAGE - The method is simple, clean and efficient preparation method of copper oxide/graphene composite material. The prepared composite material has complete crystal form, and has better conductive and catalytic effect than copper oxide. It has excellent degradation performance to organic waste water as catalyst. The lithium ion cathode material has large reversible capacity and cycle stability, the first reversible capacity reaches 784.7 mAh/g after 50 cycles, and the retention rate is 87.4% (preferably 87.5-87.9%). The method provides simple, convenient, low cost, and short preparation period. The used reducing agent belongs to the environment-friendly auxiliary agent. The reaction process does not use toxic and harmful other auxiliary agent, and there is no harmful substance generation, the waste liquid of the process byproduct is recycled