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Synergistically optimized electron and phonon transport in high-performance copper sulfides thermoelectric materials via one-pot modulation

Author

Listed:
  • Yi-Xin Zhang

    (Kunming University of Science and Technology)

  • Qin-Yuan Huang

    (Kunming University of Science and Technology)

  • Xi Yan

    (Kunming University of Science and Technology)

  • Chong-Yu Wang

    (Kunming University of Science and Technology)

  • Tian-Yu Yang

    (Kunming University of Science and Technology)

  • Zi-Yuan Wang

    (Kunming University of Science and Technology)

  • Yong-Cai Shi

    (Kunming University of Science and Technology)

  • Quan Shan

    (Kunming University of Science and Technology)

  • Jing Feng

    (Kunming University of Science and Technology)

  • Zhen-Hua Ge

    (Kunming University of Science and Technology)

Abstract

Optimizing thermoelectric conversion efficiency requires the compromise of electrical and thermal properties of materials, which are hard to simultaneously improve due to the strong coupling of carrier and phonon transport. Herein, a one-pot approach realizing simultaneous second phase and Cu vacancies modulation is proposed, which is effective in synergistically optimizing thermoelectric performance in copper sulfides. Multiple lattice defects, including nanoprecipitates, dislocations, and nanopores are produced by adding a refined ratio of Sn and Se. Phonon transport is significantly suppressed by multiple mechanisms. An ultralow lattice thermal conductivity is therefore obtained. Furthermore, extra Se is added in the copper sulfide for optimizing electrical transport properties by inducing generating Cu vacancies. Ultimately, an excellent figure of merit of ~1.6 at 873 K is realized in the Cu1.992SSe0.016(Cu2SnSe4)0.004 bulk sample. The simple strategy of inducing compositional and structural modulation for improving thermoelectric parameters promotes low-cost high-performance copper sulfides as alternatives in thermoelectric applications.

Suggested Citation

  • Yi-Xin Zhang & Qin-Yuan Huang & Xi Yan & Chong-Yu Wang & Tian-Yu Yang & Zi-Yuan Wang & Yong-Cai Shi & Quan Shan & Jing Feng & Zhen-Hua Ge, 2024. "Synergistically optimized electron and phonon transport in high-performance copper sulfides thermoelectric materials via one-pot modulation," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-47148-0
    DOI: 10.1038/s41467-024-47148-0
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    1. Pengfei Qiu & Matthias T. Agne & Yongying Liu & Yaqin Zhu & Hongyi Chen & Tao Mao & Jiong Yang & Wenqing Zhang & Sossina M. Haile & Wolfgang G. Zeier & Jürgen Janek & Ctirad Uher & Xun Shi & Lidong Ch, 2018. "Suppression of atom motion and metal deposition in mixed ionic electronic conductors," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
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