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Nano-micro-porous skutterudites with 100% enhancement in ZT for high performance thermoelectricity

Journal Article


Abstract


  • Increasing energy demands require new materials, e.g., thermoelectrics, for efficient energy conversion of fossil

    fuels. However, their low figure of merit (ZT) limits widespread applications. Nanostructuring has been an

    effective way of lowering the thermal conductivity. However, grain growth at elevated temperature is still a big

    concern, for otherwise expected to be long-lasting thermoelectric generators. Here, we report a porous

    architecture containing nano- to micrometer size irregularly shaped and randomly oriented pores, scattering a

    wide spectrum of phonons without employing the conventional rattling phenomenon. Lattice thermal

    conductivity reaches the phonon glass limit. This design yields > 100% enhancement in ZT, as compared to

    the pristine sample. An unprecedented and very promising ZT of 1.6 is obtained for Co23.4Sb69.1Si1.5Te6.0

    alloy, by far the highest ZT ever reported for un-filled skutterudites, with further benefits, i.e. rare-earth-free

    and improved oxidation resistance enabling simple processing.

Authors


  •   Khan, Atta U. (external author)
  •   Kobayashi, Kazuaki (external author)
  •   Tang, Dai-Ming (external author)
  •   Yamauchi, Yusuke (external author)
  •   Hasegawa, Kotone (external author)
  •   Mitome, Masanori (external author)
  •   Xue, Yanming (external author)
  •   Jiang, Baozhen (external author)
  •   Tsuchiya, Koichi (external author)
  •   Golberg, Dmitri (external author)
  •   Bando, Yoshio
  •   Mori, Takao (external author)

Publication Date


  • 2017

Geographic Focus


Citation


  • Khan, A. U., Kobayashi, K., Tang, D., Yamauchi, Y., Hasegawa, K., Mitome, M., Xue, Y., Jiang, B., Tsuchiya, K., Golberg, D., Bando, Y. & Mori, T. (2017). Nano-micro-porous skutterudites with 100% enhancement in ZT for high performance thermoelectricity. Nano Energy, 31 152-159.

Scopus Eid


  • 2-s2.0-84997096210

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3054

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 152

End Page


  • 159

Volume


  • 31

Place Of Publication


  • Netherlands

Abstract


  • Increasing energy demands require new materials, e.g., thermoelectrics, for efficient energy conversion of fossil

    fuels. However, their low figure of merit (ZT) limits widespread applications. Nanostructuring has been an

    effective way of lowering the thermal conductivity. However, grain growth at elevated temperature is still a big

    concern, for otherwise expected to be long-lasting thermoelectric generators. Here, we report a porous

    architecture containing nano- to micrometer size irregularly shaped and randomly oriented pores, scattering a

    wide spectrum of phonons without employing the conventional rattling phenomenon. Lattice thermal

    conductivity reaches the phonon glass limit. This design yields > 100% enhancement in ZT, as compared to

    the pristine sample. An unprecedented and very promising ZT of 1.6 is obtained for Co23.4Sb69.1Si1.5Te6.0

    alloy, by far the highest ZT ever reported for un-filled skutterudites, with further benefits, i.e. rare-earth-free

    and improved oxidation resistance enabling simple processing.

Authors


  •   Khan, Atta U. (external author)
  •   Kobayashi, Kazuaki (external author)
  •   Tang, Dai-Ming (external author)
  •   Yamauchi, Yusuke (external author)
  •   Hasegawa, Kotone (external author)
  •   Mitome, Masanori (external author)
  •   Xue, Yanming (external author)
  •   Jiang, Baozhen (external author)
  •   Tsuchiya, Koichi (external author)
  •   Golberg, Dmitri (external author)
  •   Bando, Yoshio
  •   Mori, Takao (external author)

Publication Date


  • 2017

Geographic Focus


Citation


  • Khan, A. U., Kobayashi, K., Tang, D., Yamauchi, Y., Hasegawa, K., Mitome, M., Xue, Y., Jiang, B., Tsuchiya, K., Golberg, D., Bando, Y. & Mori, T. (2017). Nano-micro-porous skutterudites with 100% enhancement in ZT for high performance thermoelectricity. Nano Energy, 31 152-159.

Scopus Eid


  • 2-s2.0-84997096210

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3054

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 152

End Page


  • 159

Volume


  • 31

Place Of Publication


  • Netherlands