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Research Article

Heat dissipation in graphene foams

Yaniv Cohen, Siva K. Reddy, Assaf Ya'akobovitz( )
Department of Mechanical Engineering, Faculty of Engineering Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
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Abstract

Graphene foam (GF)—a three-dimensional network of hollow graphene branches—is a highly attractive material for diverse applications. However, to date, the heat dissipation characteristics of GFs have not been characterized. To fill this gap, we synthesized GF devices, subjected them to high temperatures, and investigated their thermal behavior by using infrared microthermography. We find that while the convective area of GF devices is comparable to that of bulk materials (such as metals), the coefficient of convection of these devices is several orders of magnitude higher than that of metals. In addition, the GF devices showed a reproducible thermal behavior, which we attribute to negligible temperature-induced morphological changes (as confirmed by Raman analysis). Taken together, our findings suggest GF as a promising candidate material for advanced cooling applications where efficient heat dissipation is needed, e.g., in electrical circuits.

Keywords

convectiongraphene foamheat transfer

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Nano Research
Volume 14 Issue 3,
March 2021
Pages 829-833
DOI: 10.1007/s12274-020-3120-2
Cite this article:
Cohen Y, Reddy SK, Ya'akobovitz A. Heat dissipation in graphene foams. Nano Research, 2021, 14(3): 829-833. https://doi.org/10.1007/s12274-020-3120-2
Topics:
Graphene

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Received: 09 May 2020
Revised: 29 July 2020
Accepted: 15 September 2020
Published: 01 March 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature
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