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Journal of Advanced Ceramics

, Volume 8, Issue 2, pp 209–217 | Cite as

Preparation and thermoelectric properties of Cu1.8S/CuSbS2 composites

  • Chunmei Tang
  • Doudou Liang
  • Hezhang Li
  • Kun Luo
  • Boping ZhangEmail author
Open Access
Research Article
  • 64 Downloads

Abstract

Chalcostibite (CuSbS2) is composed of earth-abundant elements and has a proper band gap (Eg = 1.05 eV) as a thermoelectric (TE) material. Herein, we report the TE properties in the CuSbS2based composites with a mole ratio of (1−x)CuSbS2xCu18S (x = 0, 0.1, 0.2, 0.3), which were prepared by mechanical alloying (MA) combined with spark plasma sintering (SPS). X-ray diffraction (XRD) and back-scattered electron image (BSE) results indicate that a single phase of CuSbS2 is synthesized at x = 0 and the samples consist of CuSbS2, Cu3SbS4, and Cu12Sb4S13 at 0.1 ⩽ x ⩽ 0.3. The correlation between the phase structure, microstructure, and TE transport properties of the bulk samples is established. The electrical conductivity increases from 0.14 to 50.66 S·cm−1 at 723 K and at 0 ⩽ x ⩽ 0.03, while the Seebeck coefficient holds an appropriate value of 190.51 µV·K−1. The highest ZT value of 0.17 is obtained at 723 K and at x = 0.3 owing to the combination of a high PF 183 µW·m−1·K−2 and a low κ 0.8 W·m−1·K−1.

Keywords

CuSbS2 phase structure ZT thermoelectric 

Notes

Acknowledgements

This work was supported by National Key R&D Program of China (Grant No. 2018YFB0703600) and the National Natural Science Foundation of China (Grant No. 11474176).

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Authors and Affiliations

  • Chunmei Tang
    • 1
  • Doudou Liang
    • 1
  • Hezhang Li
    • 1
  • Kun Luo
    • 1
  • Boping Zhang
    • 1
    Email author
  1. 1.Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijingChina

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