DataVXACS Applied Energy MaterialsPaper
journal article·2023-04-10

Realizing Enhanced Thermoelectric Performance in Zintl-Phase SrCuSb by Reducing the Thermal Conductivity

Lihua Wei, Chen Chen, Honghao Yao, Zuoxu Wu, Shuaihang Hou, Xingjun Liu, Jun Mao, Xin Li, Feng Cao, Qian Zhang

ACS Applied Energy Materials· Volume 6· Issue 7
Publisher page
Source abstract

Abstract

Zintl-phase compounds have been extensively studied in recent years due to their phonon-glass and electron-crystal structure. As a ZrBeSi-type Zintl-phase compound, SrCuSb exhibits both high electrical transport properties and thermal conductivity because of the fully occupied anionic framework. In this work, the thermoelectric properties of SrCuSb were refined by Sr self-doping. The increased Sr content not only suppressed the secondary phase SrCu 2 Sb 2 but also lowered the carrier contribution to the thermal conductivity. A zT value of ∼0.36 was achieved for Sr 1.05 CuSb at 700 K. To further decrease the thermal conductivity, Ba was introduced to the alloy at the Sr site. Benefiting from the point defect scattering, the lattice thermal conductivity was reduced to ∼0.7 W K –1 m –1 at 760 K for the Sr 0.75 Ba 0.3 CuSb sample. Finally, a peak zT of ∼0.5 was obtained for Sr 0.75 Ba 0.3 CuSb at 773 K.
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Research context

Metals & alloysCeramics & glasses

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Thermal properties of materials · Thermal Expansion and Ionic Conductivity

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, and Institute of Materials Genome and Big Data, Harbin Institute of Technology, Shenzhen 518055, P. R. China

School of Physical Sciences, Great Bay University, Dongguan 523000, P. R. China

School of Science, Harbin Institute of Technology, Shenzhen 518055, P. R. China

State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, P. R. China

Department of Nuclear Technology and Application, China Institute of Atomic Energy, Beijing 102413, P. R. China

Funding

Shenzhen Fundamental Research Program · Natural Science Foundation of Shenzhen City · Science, Technology and Innovation Commission of Shenzhen Municipality · National Natural Science Foundation of China · Natural Science Foundation of Guangdong Province

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