▎ 摘　　要

NOVELTY - Device comprises e.g. through water pump connected first reaction vessel (1) and second reaction vessel. The first reaction vessel and second reaction vessel embedded with metal plate (4), first reaction vessel is filled with electrolyte (5), expandable graphite cake (2) is placed on top of first reaction vessel, expanding outer surface welding is graphite cake with conductive metal net (3), platinum wire fixing plate arranged on top of second reaction vessel, inside surface of wire fixing plate welded with multiple platinum wire, anode of power supply connected with conducting metal net. USE - The device is useful for preparing graphene (claimed). ADVANTAGE - The device produces single layer and large amount of graphene. DETAILED DESCRIPTION - Device comprises through water pump connected first reaction vessel (1) and second reaction vessel. The first reaction vessel and second reaction vessel embedded with a metal plate (4), the first reaction vessel is filled with electrolyte (5), expandable graphite cake (2) is placed on the top of the first reaction vessel, expanding the outer surface welding is graphite cake with conductive metal net (3), platinum wire fixing plate is arranged on the top of the second reaction vessel, inside surface of the wire fixing plate is vertically welded with multiple platinum wire, anode of the power supply through lead respectively connected with conducting metal net and wire fixing plate, cathode of the power supply connected through lead and two metal plates. An INDEPENDENT CLAIM is also included for preparing the graphene comprising the conductive metal plate is embedded in the bottom of the first reaction vessel, then the weak electrolyte filled with the first reaction vessel and then the expandable graphite cake is set on the upper part of the first reaction vessel, power supply are connection through conducting wire and conducting metal net and the conducting metal plate, the power supply switch the expandable graphite cake to electrolyze, after fully electrolytic, through water pump the weak electrolyte in the second reaction vessel, the anode of the power supply connected by wire and platinum wire fixing plate, the cathode of the power supply connected through lead and the metal plate, turning on the power switch in a weak acid electrolyte of graphene to perform electrolysis, fully after electrolysis, the mixture of graphene and electrolyte cleaning and taking out and then performing ultrasonic crushing drying the graphene to obtain the needed graphene. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the device for preparing graphene. First reaction vessel (1) Expandable graphite cake (2) Conductive metal net (3) Metal plate (4) Electrolyte (5)