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Enhanced Thermoelectric Properties of Cu 3 SbSe 3 -Based Composites with Inclusion Phases

Author

Listed:
  • Rui Liu

    (State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China)

  • Guangkun Ren

    (State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China)

  • Xing Tan

    (State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China)

  • Yuanhua Lin

    (State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China)

  • Cewen Nan

    (State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China)

Abstract

Cu 3 SbSe 3 -based composites have been prepared by self-propagating high-temperature synthesis (SHS) combined with spark plasma sintering (SPS) technology. Phase composition and microstructure analysis indicate that the obtained samples are mainly composed of Cu 3 SbSe 3 phase and CuSbSe 2 /Cu 2− x Se secondary phases. Our results show that the existence of Cu 2− x Se phase can clearly enhance the electrical conductivity of the composites (~16 S/cm), which is 2.5 times higher than the pure phase. The thermal conductivity can remain at about 0.30 W·m −1 ·K −1 at 653 K. A maximum ZT (defined as ZT = S 2 σ Τ /κ, where S , σ, Τ , κ are the Seebeck coefficient, electrical conductivity, absolute temperature and total thermal conductivity) of the sample SPS 633 can be 0.42 at 653 K, which is 60% higher than the previously reported values. Our results indicate that the composite structure is an effective method to enhance the performance of Cu 3 SbSe 3 .

Suggested Citation

  • Rui Liu & Guangkun Ren & Xing Tan & Yuanhua Lin & Cewen Nan, 2016. "Enhanced Thermoelectric Properties of Cu 3 SbSe 3 -Based Composites with Inclusion Phases," Energies, MDPI, vol. 9(10), pages 1-7, October.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:10:p:816-:d:80464
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    References listed on IDEAS

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    1. Xianli Su & Fan Fu & Yonggao Yan & Gang Zheng & Tao Liang & Qiang Zhang & Xin Cheng & Dongwang Yang & Hang Chi & Xinfeng Tang & Qingjie Zhang & Ctirad Uher, 2014. "Self-propagating high-temperature synthesis for compound thermoelectrics and new criterion for combustion processing," Nature Communications, Nature, vol. 5(1), pages 1-7, December.
    2. Li-Dong Zhao & Shih-Han Lo & Yongsheng Zhang & Hui Sun & Gangjian Tan & Ctirad Uher & C. Wolverton & Vinayak P. Dravid & Mercouri G. Kanatzidis, 2014. "Ultralow thermal conductivity and high thermoelectric figure of merit in SnSe crystals," Nature, Nature, vol. 508(7496), pages 373-377, April.
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