▎ 摘　　要

NOVELTY - The nano-scaled graphene platelet-based composite composition for use as an anode of lithium secondary battery, comprises micron- or nanometer-scaled particles or coating, which are capable of absorbing and desorbing lithium ions, nano-scaled graphene platelets (NGPs), a conductive additive consisting of carbon or graphitic nano-fiber, carbon nano-tube, carbon black and/or activated carbon powder, and an amorphous carbon, polymeric carbon, carbon black, coal tar pitch, petroleum pitch or meso-phase pitch in physical contact with the particles or coating. USE - The nano-scaled graphene platelet-based composite composition is useful as an anode of lithium secondary battery (claimed), which is useful for high power density applications such as electric cars. ADVANTAGE - The nano-scaled graphene platelet-based composite composition is capable of absorbing and desorbing lithium ions, and provides high cycle life, high reversible capacity and irreversible capacity to the lithium secondary battery. DETAILED DESCRIPTION - The nano-scaled graphene platelet-based composite composition for use as an anode of lithium secondary battery, comprises micron- or nanometer-scaled particles or coating, which are capable of absorbing and desorbing lithium ions, nano-scaled graphene platelets (NGPs), a conductive additive consisting of carbon or graphitic nano-fiber, carbon nano-tube, carbon black and/or activated carbon powder, and an amorphous carbon, polymeric carbon, carbon black, coal tar pitch, petroleum pitch or meso-phase pitch in physical contact with the particles or coating. The particles or coating are physically attached or chemically bonded to the platelets. An amount of platelets is 2-90 wt.%, and an amount of particles or coating is 98-10 wt.%. The platelets comprise a graphene sheet or a stack of graphene sheets having a platelet thickness of less than 100 nm. The NGPs are obtained from exfoliation and separation of graphene sheets of a laminar graphite material consisting of natural graphite, synthetic graphite, highly oriented pyrolytic graphite, graphite fiber, carbon fiber, carbon nano-fiber, graphitic nano-fiber, spherical graphite or graphite globule, meso-phase micro-bead, meso-phase pitch, graphitic coke and/or graphitized polymeric carbon. The platelets have a specific surface area of greater than 500m2/gm or an average thickness thinner than 2 nm. The particles have a dimension of less than 5 mu m or the coating has a thickness of less than 5 mu m. The particles or coating are substantially amorphous, or comprise nano crystallites and an active material capable of absorbing or extracting lithium ions. The amorphous carbon phase is obtained from chemical vapor deposition, chemical vapor infiltration, or pyrolyzation of an organic precursor. An INDEPENDENT CLAIM is included for a lithium secondary battery. DESCRIPTION OF DRAWING(S) - The diagram shows a cylinder-shape lithium ion battery. Cylindrical case (10) Insulating body (12) Assembly (14) Positive electrode (16) Separator. (18)