Realizing high figure of merit in heavy-band p-type half-Heusler thermoelectric materials
10.1038/ncomms9144
Crossref journal-article
Springer Science and Business Media LLC
Nature Communications (297)
Abstract

AbstractSolid-state thermoelectric technology offers a promising solution for converting waste heat to useful electrical power. Both high operating temperature and high figure of merit zT are desirable for high-efficiency thermoelectric power generation. Here we report a high zT of ∼1.5 at 1,200 K for the p-type FeNbSb heavy-band half-Heusler alloys. High content of heavier Hf dopant simultaneously optimizes the electrical power factor and suppresses thermal conductivity. Both the enhanced point-defect and electron–phonon scatterings contribute to a significant reduction in the lattice thermal conductivity. An eight couple prototype thermoelectric module exhibits a high conversion efficiency of 6.2% and a high power density of 2.2 W cm−2 at a temperature difference of 655 K. These findings highlight the optimization strategy for heavy-band thermoelectric materials and demonstrate a realistic prospect of high-temperature thermoelectric modules based on half-Heusler alloys with low cost, excellent mechanical robustness and stability.

Bibliography

Fu, C., Bai, S., Liu, Y., Tang, Y., Chen, L., Zhao, X., & Zhu, T. (2015). Realizing high figure of merit in heavy-band p-type half-Heusler thermoelectric materials. Nature Communications, 6(1).

Authors 7
  1. Chenguang Fu (first)
  2. Shengqiang Bai (additional)
  3. Yintu Liu (additional)
  4. Yunshan Tang (additional)
  5. Lidong Chen (additional)
  6. Xinbing Zhao (additional)
  7. Tiejun Zhu (additional)
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Dates
Type When
Created 10 years ago (Sept. 2, 2015, 5:24 a.m.)
Deposited 2 years, 8 months ago (Jan. 5, 2023, 5:52 a.m.)
Indexed 9 minutes ago (Sept. 6, 2025, 11:53 a.m.)
Issued 10 years ago (Sept. 2, 2015)
Published 10 years ago (Sept. 2, 2015)
Published Online 10 years ago (Sept. 2, 2015)
Funders 0

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@article{Fu_2015, title={Realizing high figure of merit in heavy-band p-type half-Heusler thermoelectric materials}, volume={6}, ISSN={2041-1723}, url={http://dx.doi.org/10.1038/ncomms9144}, DOI={10.1038/ncomms9144}, number={1}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Fu, Chenguang and Bai, Shengqiang and Liu, Yintu and Tang, Yunshan and Chen, Lidong and Zhao, Xinbing and Zhu, Tiejun}, year={2015}, month=sep }