▎ 摘　　要

NOVELTY - Producing a carbon material-graphene composite comprises: (a) obtaining a dispersion (102) comprising a graphene oxide material (104) and a carbon material (106) dispersed in a liquid medium (108); (b) evaporating the liquid medium to form a carbon material-graphene composite precursor (110); and (c) annealing the composite precursor at 800-1200 degrees C in the presence of an inert gas to form the carbon material-graphene composite. USE - The method is useful for producing a carbon material-graphene composite which is useful in: an energy storage device i.e. a capacitor, a supercapacitor or a rechargeable battery, preferably a lithium-ion or lithium sulfur battery (all claimed); catalysts for chemical reactions, energy storage and conversion, actuators, piezo-devices, sensors, smart textile, flexible devices, electronic and optical devices and high-performance nanocomposites; and a transport or conversion device, a piezoelectric device, an optoelectronic device, an electro-optical device, a plasmonic device, a delivery device, a polymer nanocomposite, an actuating device, a micro-electro-mechanical system/nanoelectromechanical system device, a logic device, a filtration/separation device, a capturing device, an electrochemical device, a display device, a virtual reality device, an augmented reality device, a fixture that requires flexibility e.g. an adjustable mounted wireless headset and ear buds, a communication helmet with curvatures, a medical patch, a flexible identification card, a flexible sporting good, and a packaging material and applications. ADVANTAGE - The method: provides flexible carbon material-graphene composite which is binder-free and/or support-free, and has an electrical conductivity of 1-45 S/cm, preferably 4-40 S/cm, an energy density of 10-40 Wh/kg, preferably 20 Wh/kg, a power density of 5-15 kW/kg, and/or a specific capacitance of 100-140 F/g, preferably 110-130 F/g; and utilizes graphene oxide material which has a specific surface area of 600-800 m2/g (claimed). The flexible carbon material-graphene composite exhibits excellent rate capability and cyclic stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a flexible carbon material-graphene composite comprising PAN-based activated carbon attached to a graphene layer, where the composite has a surface area of 1500-2250 m2/g, and a bimodal porous structure of micropores and mesopores. DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of producing flexible carbon material-graphene composite. Dispersion (102) Graphene oxide material (104) Carbon material (106) Liquid medium (108) Carbon material-graphene oxide composite precursor (110)