Abstract
Abstract Graphene is a new type of two-dimensional carbon material with excellent mechanical strength, high thermal conductivity, high light transmittance and high specific surface area. Its excellent performance makes it suitable for high-performance electronic devices, composite materials, gas sensors and energy storage and other fields, and has broad application prospects, especially its ultra-high thermal conductivity has attracted great interest of scholars at home and abroad. In this study, the heat transfer theory and the heat transfer mechanism of graphene are firstly cited, and three commonly used composite heat transfer fitting models are proposed. Advantages and disadvantages of measurement methods are described. According to the aforementioned theoretical basis, the equilibrium molecular dynamics and non-equilibrium molecular dynamics heat transfer models were used to fit graphene and its composites, and the thermal conductivity of graphene composites was analysed. Finally, the future research directions of graphene thermal conductivity are prospected.
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