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Synergistic effect of size distribution on the electrical and thermal conductivities of graphene-based paper

机译：规模分布对石墨烯纸电器和热导流性的协同作用

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摘要

Flexible graphene-based paper is promising for wide applications due to its outstanding electrical and thermal conductivities. Graphene flakes with large size are usually known as the key factor for improved paper performance. However, we find that a combination of flakes with large and small sizes is more favorable for both electrical and thermal conductivities than pure large flakes. In this work, flexible paper with enhanced electrical and thermal properties was fabricated by mixing graphene flakes with various size distributions. Large-size graphene (LSG) flakes play the role of a backbone structure, whereas small-size graphene (SSG) flakes fill the voids in the paper without disturbing the high orientation. The physical properties of the as-prepared graphene papers with contents of SSG varying from 0 to 100% have been investigated. It is found that the electrical and thermal conductivities of the paper with 25 wt% SSG are both around 140% higher than that of pure LSG paper. Our results indicate that the lightweight and flexible graphene-based paper has great potential for lateral heat dissipation applications requiring heat movement in a particular direction.
机译：由于其出色的电气和热导流性，柔性石墨烯纸是广泛的应用。具有大尺寸的石墨烯薄片通常称为改善纸张性能的关键因素。然而，我们发现，具有大小尺寸的薄片组合比纯大薄片更有利于电气和导热性。在这项工作中，通过用各种尺寸分布混合石墨烯片来制造具有增强电性能和热性能的柔性纸。大尺寸石墨烯（LSG）薄片发挥骨干结构的作用，而小尺寸石墨烯（SSG）薄片填充纸中的空隙而不会扰乱高方向。研究了与0至100％不同的SSG含量的制备石墨烯纸的物理性质。结果发现，具有25wt％SSG的纸张的电气和热导体比纯LSG纸张高约140％。我们的结果表明，轻质和柔韧的石墨烯的纸张具有在特定方向上进行热运动的横向散热应用的巨大潜力。

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  • 来源
    《Journal of Materials Science》 |2018年第14期|共9页
  • 作者

    Li Qi; Tian Xiaojuan; Chen Zhuo; Wu Jiaye; Li Yun; Li Yongfeng;

  • 作者单位

    China Univ Petr State Key Lab Heavy Oil Proc Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Heavy Oil Proc Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Heavy Oil Proc Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Heavy Oil Proc Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Heavy Oil Proc Beijing 102249 Peoples R China;

    China Univ Petr State Key Lab Heavy Oil Proc Beijing 102249 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
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