Hierarchical Graphene–Carbon Fiber Composite Paper as a Flexible Lateral Heat Spreader |
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| Authors: | Qing‐Qiang Kong Zhuo Liu Jian‐Guo Gao Cheng‐Meng Chen Qiang Zhang Guangmin Zhou Ze‐Chao Tao Xing‐Hua Zhang Mao‐Zhang Wang Feng Li Rong Cai |
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| Affiliation: | 1. Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, China;2. Beijing Key Laboratory of Green Chemical, Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, China;3. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China |
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| Abstract: | As a low dimensional crystal, graphene attracts great attention as heat dissipation material due to its unique thermal transfer property exceeding the limit of bulk graphite. In this contribution, flexible graphene–carbon fiber composite paper is fabricated by depositing graphene oxide into the carbon fiber precursor followed by carbonization. In this full‐carbon architecture, scaffold of one‐dimensional carbon fiber is employed as the structural component to reinforce the mechanical strength, while the hierarchically arranged two‐dimensional graphene in the framework provides a convenient pathway for in‐plane acoustic phonon transmission. The as‐obtained hierarchical carbon/carbon composite paper possesses ultra‐high in‐plane thermal conductivity of 977 W m?1 K?1 and favorable tensile strength of 15.3 MPa. The combined mechanical and thermal performances make the material highly desirable as lateral heat spreader for next‐generation commercial portable electronics. |
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| Keywords: | graphene carbon fibers heat transfer composites |
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