▎ 摘　　要

NOVELTY - Preparing quickly small size graphene comprises e.g. (a) preparing expanded graphite, providing natural crystalline flake graphite as raw material, using chemical intercalation expansion, preparing to obtain high expansion graphite, expanding multiple of the high expansion graphite is 200-500 times, (b) pressing and obtaining the expansion of expandable graphite pressing graphite with 5-3 mm thickness, (c) laser cutting using laser to cut along the thickness direction of the pressed graphite, and cutting distance is 1 microns to 2 microns to obtain the graphite powder after cutting. USE - The method is useful for preparing quickly small size graphene (claimed). ADVANTAGE - The method: solves difficult preparation of current small size graphene;is economical, and environmentally friendly. DETAILED DESCRIPTION - Preparing quickly small size graphene comprises (a) preparing expanded graphite, providing natural crystalline flake graphite as raw material, using chemical intercalation expansion, preparing to obtain high expansion graphite, expanding multiple of the high expansion graphite is 200-500 times, (b) pressing and obtaining the expansion of expandable graphite pressing graphite with 5-3 mm thickness, (c) laser cutting using laser to cut along the thickness direction of the pressed graphite, cutting distance is 1 microns to 2 microns to obtain the graphite powder after cutting, (d) dispersing and drying the graphite powder after cutting and carrying out ultrasonic dispersion, freezing drying to obtain the grain diameter is less than 1 mu m of graphene.