▎ 摘　　要

NOVELTY - Method for preparing a low-defect graphene-coated aluminum powder particles, involves (i) taking graphite as an electrode, taking chemically stable metal as a counter electrode, inserting the electrode and the counter electrode into an electrolyte solution, applying a voltage for electrolysis so as to expand and disperse the graphite in the electrolyte solution, and filtering the electrolyte solution to obtain expanded graphite powder, (ii) washing the expanded graphite powder with an electrolyte component, dispersing in an organic solvent, and ultrasonically treating to obtain a uniform graphene dispersion liquid, and (iii) mixing the graphene dispersion liquid with aluminum powder or aluminum alloy powder, collecting precipitate, and drying to obtain the composite particles. USE - The method is useful for preparing a low-defect graphene-coated aluminum powder particles. ADVANTAGE - The low-defect graphene-coated aluminum powder particles contains graphene that is closely adsorbed on the surface of the aluminum powder particles, has low degree of graphene oxidation, has fewer structural and chemical defects, and has high electrical and thermal conductivity.