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Interface Engineering for High-Performance Thermoelectric Carbon Nanotube Films.

Ying Zhou1, Qingshuo Wei2, Minfang Zhang1

  • 1Nano Carbon Device Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 3058565, Japan.

ACS Applied Materials & Interfaces
|December 19, 2023
PubMed
Summary
This summary is machine-generated.

Researchers optimized carbon nanotube (CNT) films by modifying interfaces, successfully reducing thermal conductivity while maintaining electrical conductivity for advanced thermoelectric devices. This breakthrough enables high-performance thermoelectric power generation using CNTs.

Keywords:
CNT–CNT interfacecarbon nanotube filmschemical modificationpore structurethermal conductivitythermoelectrics

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Condensed Matter Physics

Background:

  • Carbon nanotubes (CNTs) possess excellent electrical, thermal, and mechanical properties, making them suitable for thermoelectric applications.
  • Precise control over electrical and thermal transport is crucial for maximizing the performance of CNT-based thermoelectric devices.

Purpose of the Study:

  • To investigate interface optimization in single-walled CNT films for improved thermoelectric performance.
  • To demonstrate a method for reducing thermal conductivity while preserving electrical conductivity in CNT films.
  • To achieve high thermoelectric power factors in both p- and n-type CNT films.

Main Methods:

  • Interface engineering through blending functionalized CNTs.
  • Fabrication of single-walled CNT films.
  • Characterization of electrical and thermal transport properties.
  • Measurement of thermoelectric power factors.

Main Results:

  • Interface modification effectively suppressed thermal conductivity in CNT films.
  • Robust electrical conductivity was preserved alongside reduced thermal conductivity.
  • Blending functionalized CNTs allowed for tailoring of structural and electronic properties.
  • Achieved power factors of 507 μW/mK² for p-type and 171 μW/mK² for n-type CNTs at room temperature.

Conclusions:

  • Interface optimization is a viable strategy for developing high-performance thermoelectric CNT films.
  • Tailoring CNT film interfaces significantly influences thermal and electrical transport.
  • The developed method facilitates the fabrication of efficient p- and n-type thermoelectric materials.