▎ 摘　　要

NOVELTY - Producing a mass of graphene-embraced particulates or secondary particles directly from a graphitic material for use as a lithium-ion battery anode active material, comprises e.g.: (a) mixing multiple particles of a graphitic material and multiple primary particles of a solid anode active material and an optional ball-milling media in an impacting chamber of an energy impacting apparatus; and (b) operating the energy impacting apparatus with a frequency and an intensity for a length of time sufficient for peeling off graphene sheets from the particles of graphitic material and transferring the peeled graphene sheets to surfaces of the primary particles of the solid anode active material to fully embrace or encapsulate the primary particles to produce graphene-embraced or graphene-encapsulated primary particles of the anode active material inside the impacting chamber. USE - The method is useful for producing a mass of graphene-embraced particulates or secondary particles directly from a graphitic material for use as a lithium-ion battery anode active material. ADVANTAGE - The method: produces isolated graphene sheets which must be arranged in a structure to prevent rapid capacity decay; and is simple, fast, scalable, environmentally friendly, and cost-effective. DETAILED DESCRIPTION - Producing a mass of graphene-embraced particulates or secondary particles directly from a graphitic material for use as a lithium-ion battery anode active material, comprises: (a) mixing multiple particles of a graphitic material and multiple primary particles of a solid anode active material and an optional ball-milling media in an impacting chamber of an energy impacting apparatus, where the graphitic material has never been previously intercalated, oxidized, or exfoliated and the impacting chamber contains in it no previously produced isolated graphene sheets; (b) operating the energy impacting apparatus with a frequency and an intensity for a length of time sufficient for peeling off graphene sheets from the particles of graphitic material and transferring the peeled graphene sheets to surfaces of the primary particles of the solid anode active material to fully embrace or encapsulate the primary particles to produce graphene-embraced or graphene-encapsulated primary particles of the anode active material inside the impacting chamber; (c) recovering the graphene-embraced or graphene-encapsulated primary particles from the impacting chamber, where at least one of the embraced or encapsulated primary particles contains multiple graphene sheets of a first graphene material embracing or encapsulating at least one of the primary particles; and (d) combining a mass of the recovered graphene-embraced or graphene-encapsulated primary particles, an optional conductive additive, and graphene sheets of a second graphene material into a mass of graphene-embraced particulates, where the particulate comprises a single or many graphene-encapsulated primary particles of an anode active material, comprising a primary particle of the anode active material and multiple sheets of the first graphene material overlapped together to embrace or encapsulate the primary particle, the single or many graphene-encapsulated primary particles, along with an optional conductive additive, are further embraced or encapsulated by multiple sheets of a second graphene material, the first graphene material is the same as or different from the second graphene material, and the first graphene material and the second graphene material are each in a content 0.01-20 wt.% and the optional conductive additive is in a content of 0-50 wt.%.