▎ 摘　　要

NOVELTY - Metal or metal oxide/graphene self-assembly nanocomposite preparation involves mixing salt of graphite oxide solution and metal or metal oxide to synthesize metal or metal oxide/graphene nanocomposite. A reducing agent is added in the formed mixture with stirring to form metal or metal oxide/graphite oxide composite. The graphite oxide solution is mixed in solvent selected from distilled water, ethanol or ethylene glycol. USE - Method for preparing metal or metal oxide/graphene self-assembly nanocomposite used in cathode material in lithium secondary battery (all claimed). ADVANTAGE - The method prepares the metal or metal oxide/graphene self-assembly nanocomposite having excellently improved conductivity and lifetime property compared to the existing battery without adding additional conductive material, and provides effective control for enrollment layer and coherence of the graphene. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic real image of the tin dioxide/graphene nanocomposite of three dimensional structure.