Graphene powder, and preparation method therefor and application thereof
AssigneesChina Petroleum & Chemical Corporation, Shanghai Research Institute of Petrochemical Technology, Sinopec
InventorsSai Sun, Siyu Zhang, Wenqian Dong, Huanxin Gao
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Abstract
A graphene powder, its preparation method and application are provided. The graphene powder is a stack of graphene sheets. The graphene powder involves in its Raman spectrum a D peak and a G peak with peak heights of ID and IG respectively, where ID/IG is 0.10 or less. The graphene powder can be applied in conductive composite materials, anti-corrosion coatings, heat dissipation composite materials. In particular, when used in lithium-ion batteries, it can significantly reduce electrode internal resistance and improve battery stability at any current rates.
Claims12
A graphene powder comprising particles that each comprises a plurality of graphene sheets and voids disposed among the plurality of graphene sheets, wherein the graphene powder has a Raman spectrum with a D peak and a G peak having peak heights of ID and IG, respectively, wherein ID/IG is 0.03-0.10, and wherein the graphene powder has a carbon content of greater than or equal to 99.50%, a particle size of 20-35 μm, a specific surface area of 50-300 m2/g, and an oxygen content of 300 ppm or less.
Dependencies are inferred from the claim text.