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Three dimensional architected thermoelectric devices with high toughness and power conversion efficiency

Author

Listed:
  • Vaithinathan Karthikeyan

    (City University of Hong Kong
    City University of Hong Kong)

  • James Utama Surjadi

    (City University of Hong Kong
    City University of Hong Kong)

  • Xiaocui Li

    (City University of Hong Kong)

  • Rong Fan

    (City University of Hong Kong)

  • Vaskuri C. S. Theja

    (City University of Hong Kong
    City University of Hong Kong)

  • Wen Jung Li

    (City University of Hong Kong)

  • Yang Lu

    (City University of Hong Kong
    City University of Hong Kong
    The University of Hong Kong)

  • Vellaisamy A. L. Roy

    (Hong Kong Metropolitan University)

Abstract

For decades, the widespread application of thermoelectric generators has been plagued by two major limitations: heat stagnation in its legs, which limits power conversion efficiency, and inherent brittleness of its constituents, which accelerates thermoelectric generator failure. While notable progress has been made to overcome these quintessential flaws, the state-of-the-art suffers from an apparent mismatch between thermoelectric performance and mechanical toughness. Here, we demonstrate an approach to potentially enhance the power conversion efficiency while suppressing the brittle failure in thermoelectric materials. By harnessing the enhanced thermal impedance induced by the cellular architecture of microlattices with the exceptional strength and ductility (>50% compressive strain) derived from partial carbonization, we fabricate three-dimensional (3D) architected thermoelectric generators that exhibit a specific energy absorption of ~30 J g−1 and power conversion efficiency of ~10%. We hope our work will improve future thermoelectric generator fabrication design through additive manufacturing with excellent thermoelectric properties and mechanical robustness.

Suggested Citation

  • Vaithinathan Karthikeyan & James Utama Surjadi & Xiaocui Li & Rong Fan & Vaskuri C. S. Theja & Wen Jung Li & Yang Lu & Vellaisamy A. L. Roy, 2023. "Three dimensional architected thermoelectric devices with high toughness and power conversion efficiency," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-37707-2
    DOI: 10.1038/s41467-023-37707-2
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    References listed on IDEAS

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