▎ 摘　　要

NOVELTY - Device comprises an electrolytic anode, an electrolytic cathode, a reaction vessel, a direct current power supply, and a cooling device. The electrolytic cathode consists of N layers of metal mesh structures (14) with decreasing pore size, which are fixed to each other and make electrical contact, where N≥2. USE - Device for preparing high graphene oxide used in transistors, solar cells, flexible sensors, biomedical engineering, nanomedicine, tumor therapy, tissue engineering, drug delivery, bio-imaging, and bio-molecular sensing (claimed). ADVANTAGE - The device can improve the product performance and quality, which is convenient for collecting and taking graphene. The device directly uses graphite as the anode results in the problems that the exfoliated graphene leaves the anode, where the material is not sufficiently oxidized, and the layered structure is uneven. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing high graphene oxide, which involves placing the electrolytic anode and the electrolytic cathode in the reaction vessel containing the electrolyte, placing the graphite material in the center of the electrolytic anode, connecting the power supply, turning on the cooling device for realizing electrochemical stripping under a specific voltage, filtering the electrolyte to get the primary graphene powder, and washing and drying the primary graphene powder to obtain the graphene powder product. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the electrolytic anode. 11Top layer 12Reaction layer 13Detention layer 14Metal mesh structures