▎ 摘　　要

NOVELTY - The method comprises (a) providing a continuous film of a graphene material into a deposition zone, (b) introducing vapor or atoms of a precursor anode active material into the deposition zone and depositing the vapor or atoms onto a surface of the graphene material to form a coated film of an anode active material-coated graphene material, and (c) mechanically breaking the coated film into multiple pieces of anode active material-coated graphene sheets. The graphene material is present in an amount of 0.1-99.5 wt.%. The anode active material is present in an amount of 0.5 wt.%. USE - The method is useful for producing an anode active material-coated graphene sheet for a lithium battery (claimed), preferably lithium secondary battery, which is useful for power tool and electric vehicle applications. ADVANTAGE - The method ensures mass production of anode active material-coated graphene sheet with high conductivity thus effectively improving cycle life, reversible and irreversible capacity and compatibility of the battery. DETAILED DESCRIPTION - The method comprises (a) providing a continuous film of a graphene material into a deposition zone, (b) introducing vapor or atoms of a precursor anode active material into the deposition zone and depositing the vapor or atoms onto a surface of the graphene material to form a coated film of an anode active material-coated graphene material, and (c) mechanically breaking the coated film into multiple pieces of anode active material-coated graphene sheets. The graphene material is present in an amount of 0.1-99.5 wt.%. The anode active material is present in an amount of 0.5 wt.%. The graphene material comprises single-layer or less than 10 graphene planes. The continuous film of a graphene material is produced by: spraying a graphene suspension onto a solid substrate, where the graphene suspension contains a graphene material dispersed in a liquid medium; removing the liquid medium; and chemical vapor deposition of the graphene material onto the solid substrate. The coated film of an anode active material-coated graphene material has an anode active material coating thickness of less than 20 nm. The step of forming an anode active material-coated graphene material entails chemical vapor deposition, physical vapor deposition, sputtering, or laser-assisted thin-film deposition of an anode active material onto a film of a graphene material. The step of mechanical breaking the coated film entails air jet milling, impact milling, grinding, mechanical shearing and/or ultrasonication. The method further comprises shaping the multiple pieces of anode active material-coated graphene sheets into a secondary particle having a size of less than 5 mu m. The step (b) comprises depositing a layer of carbon or graphite material onto a surface of the film of an anode active material-coated graphene material, and collecting the coated film onto a winding roller. The method further comprises mixing the multiple pieces of anode active material-coated graphene sheets and a resin binder and/or a conductive filler to form an anode layer, and separating or removing the graphene sheet from the anode active materials and collecting the anode active material. The step of shaping the multiple pieces of anode active material-coated graphene sheets into a secondary particle comprises dispersing the multiple pieces of anode active material-coated graphene sheets in a liquid medium to form a multi-component suspension and drying the multi-component suspension to form the secondary particle using a spray-drying, spray-pyrolysis, fluidized-bed drying, atomization, or aerosolizing step. The step (a) comprises feeding the continuous film from a feeder roller into the deposition zone. An INDEPENDENT CLAIM is included for an anode active material-coated graphene sheet produced by the method. DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a method for producing anode active material-coated graphene sheets.