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Solubility design leading to high figure of merit in low-cost Ce-CoSb3 skutterudites

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Listed:
  • Yinglu Tang

    (California Institute of Technology
    Northwestern University)

  • Riley Hanus

    (Northwestern University)

  • Sinn-wen Chen

    (National Tsing Hua University)

  • G. Jeffrey Snyder

    (Northwestern University)

Abstract

CoSb3-based filled skutterudite has emerged as one of the most viable candidates for thermoelectric applications in automotive industry. However, the scale-up commercialization of such materials is still a challenge due to the scarcity and cost of constituent elements. Here we study Ce, the most earth abundant and low-cost rare earth element as a single-filling element and demonstrate that, by solubility design using a phase diagram approach, the filling fraction limit (FFL) x in CexCo4Sb12 can be increased more than twice the amount reported previously (x=0.09). This ultra-high FFL (x=0.20) enables the optimization of carrier concentration such that no additional filling elements are needed to produce a state of the art n-type skutterudite material with a zT value of 1.3 at 850 K before nano-structuring. The earth abundance and low cost of Ce would potentially facilitate a widespread application of skutterudites.

Suggested Citation

  • Yinglu Tang & Riley Hanus & Sinn-wen Chen & G. Jeffrey Snyder, 2015. "Solubility design leading to high figure of merit in low-cost Ce-CoSb3 skutterudites," Nature Communications, Nature, vol. 6(1), pages 1-7, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8584
    DOI: 10.1038/ncomms8584
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    Cited by:

    1. Wenjie Li & David Stokes & Bed Poudel & Udara Saparamadu & Amin Nozariasbmarz & Han Byul Kang & Shashank Priya, 2019. "High-Efficiency Skutterudite Modules at a Low Temperature Gradient," Energies, MDPI, vol. 12(22), pages 1-11, November.
    2. Guo, Lukai & Wang, Hao, 2022. "Non-intrusive movable energy harvesting devices: Materials, designs, and their prospective uses on transportation infrastructures," Renewable and Sustainable Energy Reviews, Elsevier, vol. 160(C).

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