▎ 摘　　要

NOVELTY - A composite material is fabricated by forming an emulsion mixture of active material particles and graphene emulsion droplets containing immiscible first and second solvents and a solid-state emulsifier of graphene, where the first and second solvents are adapted such that the second solvent resides in an interior of the graphene emulsion droplets with the first solvent as an exterior solvent, and the active material particles reside in the interior of the emulsion droplets and where a boiling point of the second solvent is lower than that of the first solvent; and drying the emulsion mixture with subsequent evaporation of second solvent and first solvent through fractional distillation to form the composite material having each surface of the active material particles conformally coated with the graphene. USE - Fabrication of composite material for electrode used for electrochemical device e.g., battery (all claimed). Can be used for lithium-ion batteries, graphene coatings, cathode materials, and conductive additives. ADVANTAGE - The composite materials and electrodes achieve efficient electron and lithium-ion transport kinetics at exceptionally low conductive additive levels and industrially relevant active material areal loadings. The battery has high specific and volumetric capacity, rate capability, cycle-life, and Coulombic efficiency. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) composite material comprising graphene; and active material particles, where each surface of the active material particles is conformally coated with graphene; and (2) electrode for an electrochemical device comprising a composite material comprising graphene, and active material particles, where each surface of the active material particles is conformally coated with graphene.