▎ 摘　　要

NOVELTY - The system has a heat-conducting layer including a graphene oxide-coated graphitic foil laminate, which thermally shields an external surface of an electronic device from heat generated by a heat source. The laminate is composed of a graphitic substrate or core layer including a graphene oxide coating layer formed on a primary surface. The graphitic substrate or core layer defines thickness being greater than 1 nm. The graphene oxide coating layer defines thickness being greater than 1 nm and an oxygen content of 0.01%-40% by weight based on total graphene oxide coating weight. USE - Heat dissipation system. ADVANTAGE - The laminate contains a unitary graphene oxide layer or graphene single crystal coated on a major surface of a graphitic substrate layer in an effective manner, while protecting the electronic device. The system allows data to be demonstrated that a graphene oxide coating can significantly improve electric conductivity, thermal conductivity, tensile strength, scratch resistance and hardness of a graphitic layer, so that excellent scratch resistance and surface hardness results in reduction or elimination of graphite or carbon particles from being scratched-off a foil surface. DETAILED DESCRIPTION - The laminate is an electrically and thermally conductive graphene oxide-coated graphitic foil laminate. The graphene oxide coating layer is produced from thermal conversion of graphene oxide gel. The heat source is a CPU or battery. The electronic device is selected from a group consisting of a digital camera, mobile phone, laptop computer, tablet, electronic book or e-book and a power tool or hand-held video recording device. The graphitic substrate or core layer is made from flexible graphite foil, graphene film, graphene paper, graphite particle paper, carbon-carbon composite film, carbon nano-fiber paper or carbon nano-tube paper. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a structure illustrating a scanning electron microscope (SEM) image of a graphene oxide coating layer in which graphene sheet is originally of 30 nm-2 micrometer in lateral dimension and seamlessly merged into continuous-length graphene sheets or layers that are of 100 cm wide or length.