Carbon honeycomb structure with high axial thermal transport and strong robustness

作     者：Wei-Jun Ren Shuang Lu Cui-Qian Yu Jia He Jie Chen Wei-Jun Ren;Shuang Lu;Cui-Qian Yu;Jia He;Jie Chen

作者机构：China-EU Joint Lab for NanophononicsMOE Key Laboratory of Advanced Micro-Structured MaterialsCenter for Phononics and Thermal Energy ScienceSchool of Physics Science and EngineeringTongji UniversityShanghai 200092China 

出 版 物：《稀有金属:英文版》 (Rare Metals)

年 卷 期：2023年第42卷第8期

页      面：2679-2687页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 0802[工学-机械工程] 

基　　金：financially supported by the grants from the National Natural Science Foundation of China(Nos.12075168 and 11890703) the Science and Technology Commission of Shanghai Municipality(No.21JC1405600) the Fundamental Research Funds for the Central Universities(No.22120220060)。 

主　　题：Carbon honeycomb Thermal conductivity Molecular dynamics simulation Phonon transmission Structural disorder 

摘      要：Thermal transport properties of low-dimensional nanomaterials are highly anisotropic and sensitive to the structural disorder,which can greatly limit their applications in heat dissipation.In this work,we unveil that the carbon honeycomb structures which have high in-plane thermal conductivity simultaneously possess high axial thermal conductivity.Based on non-equilibrium molecular dynamics simulations,we find that the intrinsic axial thermal conductivity of carbon honeycomb structure reaches 746 W·m^(-1)·K^(-1)at room temperature,comparable to that of good heat dissipation materials such as hexagonal boron nitride.By comparing the phonon transmission spectrum between carbon honeycombs and few layer graphene,the physical mechanism responsible for the high axial thermal conductivity of carbon honeycombs is discussed.More importantly,our simulation results further demonstrate that the high axial thermal conductivity of carbon honeycomb structure is robust to the structural disorder,which is a common issue during the mass production of the carbon honeycomb structure.Our study suggests that the carbon honeycomb structure has unique advantages to serve as the thermal management material for practical applications.