Journal
CARBON
Volume 144, Issue -, Pages 249-258Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2018.12.027
Keywords
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Funding
- Shanghai key basic research project [14JC1400600]
- 973 project [2011CB605702]
- National Science Foundation of China [51173027]
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Graphene film has potential to act as an excellent heat dissipation material. However, its thermal conductivity suffers from some limitations, including small graphene lateral sizes and low production efficiency from a practical viewpoint. To solve these issues, we propose an industrially viable protocol to synthesize homogeneously oxidized graphite oxide (GtO) with large lateral sizes and easy-purifying features. We employ polyacrylonitrile (PAN) as a coupling agent to repair the defects on GtO sheets and link these sheets together during the annealing treatment. The graphitized GtO/10%PAN film (g-GtO/10%PAN) shows excellent thermal and electrical properties, with an in-plane thermal conductivity of 1629.24 +/- 43.88 W m(-1) K-1 and an electrical conductivity of 9645.29 +/- 199.44 S cm(-1). Furthermore, it also exhibits outstanding flexibility; the original thermal conductivity can be maintained after 20,000 times bending. The g-GtO/10%PAN film offers an alternative to replace commercially used graphitized polyimide (PI) film. Our research provides a general method for the fabrication of high quality graphene film. (C) 2018 Elsevier Ltd. All rights reserved.
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