▎ 摘　　要

NOVELTY - Manufacturing a composite comprises (a) mixing graphene, silicon-based particles, carbon nanotubes and a solvent to obtain a mixed solution, (b) coating graphene oxide to surround silicon-based particles as solvent which is evaporated by spray-drying the mixed solution to obtain composite particles in which the carbon nanotubes are bonded to the graphene oxide, (c) reducing the graphene oxide and the carbon nanotubes by heat-treating the composite particles, (d) mixing carbon nanotubes and a metal salt compound for composite powder by applying a shear stress to an acid solution, (e) heating the carbon nanotube liquid crystal phase, and oxygen-containing functional groups are formed by the metal salt compound and acid solution to obtain a particled carbon nanotube and (f) washing and filtering the carbon nanotube into which the oxygen-containing functional group is introduced. USE - The method is useful in manufacturing composite for anode material in secondary battery (claimed). ADVANTAGE - The method: is possible to perform the heat treatment that was conventionally performed under an inert gas atmosphere at a high temperature of 500-1,000° C and has heat resistance stability, where there is a significant improvement effect; the dispersibility of the carbon nanotubes is improved and eventually the aggregation of the carbon nanotubes is reduced, and has a resolving effect; and defects are minimized and graphene oxide and carbon nanotubes that can be reduced without heat treatment under a high temperature inert gas atmosphere are used, and there is an effect of improving the electrical conductivity of a silicon-based anode material for a secondary battery. DETAILED DESCRIPTION - Manufacturing a composite comprises (a) mixing graphene, silicon-based particles, carbon nanotubes, and a solvent to obtain a mixed solution, (b) coating graphene oxide to surround silicon-based particles as solvent which is evaporated by spray-drying the mixed solution to obtain composite particles in which the carbon nanotubes are bonded to the graphene oxide, (c) reducing the graphene oxide and the carbon nanotubes by heat-treating the composite particles, (d) mixing carbon nanotubes and a metal salt compound for composite powder by applying a shear stress to an acid solution, where the metal salt compound is co-intercalated between adjacent layers of the carbon nanotubes to obtain a liquid crystal phase, (e) heating the carbon nanotube liquid crystal phase, and oxygen-containing functional groups are formed by the metal salt compound and acid solution to obtain a particled carbon nanotube, and (f) washing and filtering the carbon nanotube into which the oxygen-containing functional group is introduced. INDEPENDENT CLAIMS are also included for composite obtained by the above method; and econdary battery comprising negative electrode including the composite, a separator provided between the anode and the cathode and electrolyte. DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating the manufacturing a composite for an anode material (Drawing includes non-English language text).