▎ 摘　　要

NOVELTY - Graphene composite thin film composition comprises nano graphene platelets (NGPs) bonded by a graphene oxide binder, where: the NGPs contain single-layer graphene or multi-layer graphene sheets having a thickness from 0.335-100 nm and occupy a weight fraction of 1-99.9% of the total composite weight; the graphene oxide binder has an oxygen content of 0.1-40 wt.%, occupies a weight fraction of 0.1-99% of the total composite weight; and the composite forms a thin film with a thickness less than 1 mm. USE - The composition is useful for graphene composite thin film (claimed), which is useful as a heat spreader in a microelectronic device (such as mobile phone, notebook computer, e-book and tablet), flexible display, LED, power tool, computer CPU, power electronics and LCD. ADVANTAGE - The composition improves the thermal conductivity, electrical conductivity and tensile strength of the thin film. The film has lightweight and high mechanical strength and structural integrity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for producing a graphene composite film, comprising (a) preparing single-layer or multilayer graphene platelets from the graphitic material, (b) preparing a graphene oxide gel having graphene oxide molecules dispersed in a fluid medium, where the graphene oxide gel is optically transparent or translucent, (c) mixing the graphene platelets in the graphene oxide gel to form a composite gel, and (d) forming the composite gel into the composite thin film by removing the fluid medium.