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Thermoelectric Properties of Reduced Graphene Oxide/Bi 2 Te 3 Nanocomposites

Author

Listed:
  • Yong Du

    (School of Materials Science and Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, China)

  • Jia Li

    (School of Materials Science and Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, China)

  • Jiayue Xu

    (School of Materials Science and Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, China)

  • Per Eklund

    (Thin Film Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-58183 Linköping, Sweden)

Abstract

Reduced graphene oxide (rGO)/Bi 2 Te 3 nanocomposite powders with different contents of rGO have been synthesized by a one-step in-situ reductive method. Then, rGO/Bi 2 Te 3 nanocomposite bulk materials were fabricated by a hot-pressing process. The effect of rGO contents on the composition, microstructure, TE properties, and carrier transportation of the nanocomposite bulk materials has been investigated. All the composite bulk materials show negative Seebeck coefficient, indicating n-type conduction. The electrical conductivity for all the rGO/Bi 2 Te 3 nanocomposite bulk materials decreased with increasing measurement temperature from 25 °C to 300 °C, while the absolute value of Seebeck coefficient first increased and then decreased. As a result, the power factor of the bulk materials first increased and then decreased, and a power factor of 1340 μWm −1 K −2 was achieved for the nanocomposite bulk materials with 0.25 wt% rGO at 150 °C.

Suggested Citation

  • Yong Du & Jia Li & Jiayue Xu & Per Eklund, 2019. "Thermoelectric Properties of Reduced Graphene Oxide/Bi 2 Te 3 Nanocomposites," Energies, MDPI, vol. 12(12), pages 1-10, June.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:12:p:2430-:d:242537
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    References listed on IDEAS

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    1. Rama Venkatasubramanian & Edward Siivola & Thomas Colpitts & Brooks O'Quinn, 2001. "Thin-film thermoelectric devices with high room-temperature figures of merit," Nature, Nature, vol. 413(6856), pages 597-602, October.
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