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Rapid Communication | Open Access

Electrical and thermal transport behaviours of high-entropy perovskite thermoelectric oxides

Yunpeng ZHENGaMingchu ZOUaWenyu ZHANGaDi YIaJinle LANbCe-Wen NANaYuan-Hua LINa( )
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
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Oxide-based ceramics could be promising thermoelectric materials because of their thermal and chemical stability at high temperature. However, their mediocre electrical conductivity or high thermal conductivity is still a challenge for the use in commercial devices. Here, we report significantly suppressed thermal conductivity in SrTiO3-based thermoelectric ceramics via high-entropy strategy for the first time, and optimized electrical conductivity by defect engineering. In high-entropy (Ca0.2Sr0.2Ba0.2Pb0.2La0.2)TiO3 bulks, the minimum thermal conductivity can be 1.17 W/(m·K) at 923 K, which should be ascribed to the large lattice distortion and the huge mass fluctuation effect. The power factor can reach about 295 μW/(m·K2) by inducing oxygen vacancies. Finally, the ZT value of 0.2 can be realized at 873 K in this bulk sample. This approach proposed a new concept of high entropy into thermoelectric oxides, which could be generalized for designing high-performance thermoelectric oxides with low thermal conductivity.


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Journal of Advanced Ceramics
Pages 377-384
Cite this article:
ZHENG Y, ZOU M, ZHANG W, et al. Electrical and thermal transport behaviours of high-entropy perovskite thermoelectric oxides. Journal of Advanced Ceramics, 2021, 10(2): 377-384.








Web of Science





Received: 15 January 2021
Accepted: 21 January 2021
Published: 29 January 2021
© The Author(s) 2021

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