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Energies 2016, 9(10), 816; doi:10.3390/en9100816

Enhanced Thermoelectric Properties of Cu3SbSe3-Based Composites with Inclusion Phases

State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China
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Academic Editor: Zhi-Gang Chen
Received: 18 August 2016 / Revised: 3 October 2016 / Accepted: 9 October 2016 / Published: 14 October 2016
(This article belongs to the Special Issue Thermoelectric Materials for Energy Conversion)
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Abstract

Cu3SbSe3-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 Cu3SbSe3 phase and CuSbSe2/Cu2−xSe secondary phases. Our results show that the existence of Cu2−xSe 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 = S2σΤ/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 Cu3SbSe3. View Full-Text
Keywords: Cu3SbSe3; Cu2−xSe; electrical conductivity; spark plasma sintering (SPS) Cu3SbSe3; Cu2−xSe; electrical conductivity; spark plasma sintering (SPS)
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MDPI and ACS Style

Liu, R.; Ren, G.; Tan, X.; Lin, Y.; Nan, C. Enhanced Thermoelectric Properties of Cu3SbSe3-Based Composites with Inclusion Phases. Energies 2016, 9, 816.

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