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An electrochemical thermal transistor

Sood, Aditya ; Xiong, Feng ; Chen, Shunda ; Wang, Haotian ; Selli, Daniele ; Zhang, Jinsong ; McClellan, Connor J. ; Sun, Jie ; Donadio, Davide ; Cui, Yi ; Pop, Eric ; Goodson, Kenneth E.

Nature communications, 2018-10, Vol.9 (1) [Periódico revisado por pares]

United Kingdom: Nature Publishing Group

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  • Título:
    An electrochemical thermal transistor
  • Autor: Sood, Aditya ; Xiong, Feng ; Chen, Shunda ; Wang, Haotian ; Selli, Daniele ; Zhang, Jinsong ; McClellan, Connor J. ; Sun, Jie ; Donadio, Davide ; Cui, Yi ; Pop, Eric ; Goodson, Kenneth E.
  • Assuntos: ENGINEERING
  • É parte de: Nature communications, 2018-10, Vol.9 (1)
  • Notas: USDOE
    AC02-76SF00515; ECCS-1542152; EFRI 2-DARE: 1542883; POETS ERC: EEC-1449548; FA9550-14-1-0251
  • Descrição: Abstract The ability to actively regulate heat flow at the nanoscale could be a game changer for applications in thermal management and energy harvesting. Such a breakthrough could also enable the control of heat flow using thermal circuits, in a manner analogous to electronic circuits. Here we demonstrate switchable thermal transistors with an order of magnitude thermal on/off ratio, based on reversible electrochemical lithium intercalation in MoS 2 thin films. We use spatially-resolved time-domain thermoreflectance to map the lithium ion distribution during device operation, and atomic force microscopy to show that the lithiated state correlates with increased thickness and surface roughness. First principles calculations reveal that the thermal conductance modulation is due to phonon scattering by lithium rattler modes, c -axis strain, and stacking disorder. This study lays the foundation for electrochemically-driven nanoscale thermal regulators, and establishes thermal metrology as a useful probe of spatio-temporal intercalant dynamics in nanomaterials.
  • Editor: United Kingdom: Nature Publishing Group
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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