▎ 摘　　要

NOVELTY - The method involves dissolving the lithium salt in deionized water, stirring uniformly, and mixing the graphene oxide powder and the lithium salt solution, and uniformly ultrasonically processing for 30 minutes. The ultrasonic mixed solution is dried in a vacuum oven to obtain a lithium-assisted microwave-reduced graphene precursor. The lithium-assisted microwave-reduced graphene precursor is then ground and placed in a corundum with a lid. The microwave is turned on to cool the circulating water, turn on the microwave switch, the power is adjusted, and the temperature in the furnace reach 200 degrees C is made. The microwave switch is turned off after the lid of the corundum is ejected, and the temperature in the furnace is naturally cooled to 50 degrees C. The cooling circulating water was closed, and nitrogen gas is introduced until the pressure in the furnace returned to normal pressure, and the door was opened to obtain lithium-assisted microwave reduction of graphene. USE - Method for reducing exfoliation of graphene oxide by lithium assisted microwave thermal expansion method. ADVANTAGE - The van der Waals forces overcome the bonding of the graphene sheets is achieved thereby achieving reduction and peeling. The presence of lithium breaks the original electronic structure and is more conducive to the exfoliation of graphene sheets. The preparation method has simple process, high preparation speed, low cost and large-scale production, and the product is black floc. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the transmission electron micrograph of graphene prepared by lithium-assisted method.