Highly Thermo-Conductive Three-Dimensional Graphene Aqueous Medium

作     者：Zheng Bo Chongyan Ying Huachao Yang Shenghao Wu Jinyuan Yang Jing Kong Shiling Yang Yanguang Zhou Jianhua Yan Kefa Cen Zheng Bo;Chongyan Ying;Huachao Yang;Shenghao Wu;Jinyuan Yang;Jing Kong;Shiling Yang;Yanguang Zhou;Jianhua Yan;Kefa Cen

作者机构：State Key Laboratory of Clean Energy UtilizationInstitute for Thermal Power EngineeringCollege of Energy EngineeringZhejiang University38 Zheda RoadHangzhou 310027People’s Republic of China ZJU-Hangzhou Global Scientific and Technological Innovation CenterHangzhou 311215People’s Republic of China Department of Mechanical and Aerospace EngineeringThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongPeople’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2020年第12卷第10期

页      面：224-235页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：the financial support from National Natural Science Foundation of China(No.51906211) the China Postdoctoral Science Foundation(No.2019M662048) the Key R&D Program of Zhejiang Province(No.2019C01044) the Zhejiang Provincial Natural Science Foundation of China(No.LR17E060002) 

主　　题：Three-dimensional graphene Thermo-conductive aqueous medium Multiscale modeling Solar thermal conversion Practical thermal management 

摘      要：Highly thermo-conductive aqueous medium is a crucial premise to demonstrate high-performance thermal-related *** has the diamond comparable thermal conductivity,while the intrinsic two-dimensional reality will result in strong anisotropic thermal conductivity and wrinkles or even crumples that significantly sacrifices its inherent properties in practical *** strategy to overcome this is to use three-dimensional(3D)architecture of ***,3D graphene structure with covalent-bonding nanofins(3D-GS-CBF)is proposed,which is then used as the filler to demonstrate effective aqueous *** thermal conductivity and thermal conductivity enhancement efficiency of 3D-GS-CBF(0.26 vol%)aqueous medium can be as high as 2.61 W m-1 K-1 and 1300%,respectively,around six times larger than highest value of the existed aqueous ***,3D-GS-CBF can be stable in the solution even after 6 months,addressing the instability issues of conventional graphene networks.A multiscale modeling including non-equilibrium molecular dynamics simulations and heat conduction model is applied to interpret experimental results.3D-GS-CBF aqueous medium can largely improve the solar vapor evaporation rate(by 1.5 times)that are even comparable to the interfacial heating system;meanwhile,its cooling performance is also superior to commercial coolant in thermal management applications.