▎ 摘　　要

NOVELTY - Repairing defects of graphene, comprises: introducing and subjecting a composite fluid having a reactive compound and a supercritical fluid to impregnate a graphene powder with in a reactor containing the graphene powder and conforming to a supercritical fluid environment, where the reactive compound is a compound comprising an element of carbon, hydrogen, nitrogen, silicon or oxygen to passivate and repair the defects of the graphene powder; and separating the composite fluid and the graphene powder, and adsorbing the graphene powder retained in the composite fluid by a molecular sieve. USE - The method is useful for repairing defects of graphene and producing graphene powder (claimed). ADVANTAGE - The method: increases graphene content from less than 80-99.95%; reduces the ratio of the defect of the graphene, increases the content of the graphene, and has less-layer graphene with high thermal conductivity and electrical conductivity; provides the graphene powder with good thermal conductivity and electrical conductivity; and is simple and low cost without any pollution problem thus environmental friendly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphene powder comprising a graphene having at least one chemical bond consisting of nitrogen-hydrogen, carbon-hydrogen, carbon-oxygen, carbon-nitrogen, and carbon-silicon, and the graphene has 20 layers or less in number where the graphene powder has a 2D/G value of 0.3-0.6, and the graphene powder has a G/D value of 2.0-4.0, and the 2D/G value and the G/D value are obtained from an intensity ratio of a Raman shift 1351 wavenumber (D band), a Raman shift 1587 wavenumber (G band), and a Raman shift 2687 wavenumber (2D band) analyzed by a Raman spectroscopy.