▎ 摘　　要

NOVELTY - Preparing high-performance graphene composite aluminum sheet comprises (i) cutting the aluminum sheet according to the planned size, and polishing the cut surface of the cut aluminum sheet using NO. 80-120 sandpaper to obtain a smooth surface aluminum sheet, immersing obtained aluminum sheet with a smooth surface in dilute hydrochloric acid for 1-2 minutes to obtain a pure aluminum sheet, adding dopamine hydrochloride into the tris-hydrochloride buffer solution to prepare the dopamine aqueous solution, adding pure aluminum flakes into dopamine aqueous solution, soaking for 15-25 minutes, taking out the aluminum flakes, and washing with deionized water to obtain the modified aluminum flakes; (ii) cleaning flake graphite using deionized water, and removing the moisture on the dried surface, compressing flake graphite at 20-25 degrees C and 60-70 MPa to obtain flake graphite, soaking the flake graphite in a mixed solution of lithium nitrate and oxalic acid for 30-40 minutes, and taking out. USE - The high-performance graphene composite aluminum sheet is useful for aerospace, automobile parts and electrical parts (all claimed). ADVANTAGE - The sheet has good heat dissipation performance, which can reduce heat when drilling, improves drilling accuracy, reduces burrs, and reduces the temperature of the drill bit. DETAILED DESCRIPTION - AN INDEPENDENT CLAIM is also included for: a high-performance graphene composite aluminum sheet, comprising aluminum sheet and graphene gel coating.