Thermal transport in graphene fiber fabricated by wet-spinning method

被引：11

作者：

Lin, Huan ^{[1
]}

Dong, Hua ^{[1
]}

Xu, Shen ^{[2
]}

Wang, Xinwei ^{[1
,2
]}

Zhang, Jingkui ^{[1
]}

Wang, Yongchun ^{[1
]}

机构：

[1] Qingdao Univ Technol, Sch Environm & Municipal Engn, Qingdao 266033, Shandong, Peoples R China

[2] Iowa State Univ, Dept Mech Engn, 2010 Black Engn Bldg, Ames, IA 50011 USA

来源：

MATERIALS LETTERS | 2016年 / 183卷

基金：

中国国家自然科学基金;

关键词：

Carbon materials; Thermal properties; Graphene fiber; Graphene oxide; Defects; OXIDE-FILMS; CONDUCTIVITY;

D O I：

10.1016/j.matlet.2016.07.092

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Graphene-based materials are usually expected to be good thermal conductors. Here, we report on the low thermal diffusivity of free-standing graphene fibers (GFs) fabricated by wet-spinning method. The GF sample mainly consists of freestanding graphene oxide. The radiation effect is excluded by measuring GFs of different lengths. The thermal diffusivity of the suspended GF sample is determined at (2.0-2.08) x 10(-6) m(2) s(-1), and the corresponding intrinsic thermal conductivity is 1.14-1.18 W/m K. The low thermal conductivity is mainly attributed to the large thermal contact resistance and very strong phonon scattering at grain boundaries. The finding will be beneficial for thermal design of GF-based thermal energy applications. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：147 / 150

页数：4

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