Issue 16, 2023

Fast fabrication of SnTe via a non-equilibrium method and enhanced thermoelectric properties by medium-entropy engineering

Abstract

Single-phase SnTe-based thermoelectric materials were prepared by a fast preparation method, known as self-propagating high-temperature synthesis under high-gravity field combined with spark plasma sintering (SHS-HG-SPS), which shortens the synthesis time from several days to several minutes. Entropy engineering has been reported as an effective method to tune the delicate trade-off between the electrical transport properties and lattice thermal conductivity, resulting in an improvement of the thermoelectric performance. Herein, the (Ge, Pb, Sb, Mn) co-alloyed SnTe alloys with medium-entropy are reported. An ultralow lattice thermal conductivity of ∼0.30 W m−1 K−1 and a higher zT value of ∼1.1 are obtained for (Sn0.70Ge0.15Pb0.15)0.86Sb0.04Mn0.1Te at 873 K. This work demonstrates that medium-entropy engineering is an effective strategy to obtain high thermoelectric properties for SnTe-based materials.

Graphical abstract: Fast fabrication of SnTe via a non-equilibrium method and enhanced thermoelectric properties by medium-entropy engineering

Supplementary files

Article information

Article type
Paper
Submitted
07 Jan 2023
Accepted
27 Mar 2023
First published
31 Mar 2023

J. Mater. Chem. C, 2023,11, 5363-5370

Fast fabrication of SnTe via a non-equilibrium method and enhanced thermoelectric properties by medium-entropy engineering

H. Su, Y. Han, L. Xie, M. Jiang, Z. Wang, Z. Miao, G. Liu, M. Zhou, R. Huang and L. Li, J. Mater. Chem. C, 2023, 11, 5363 DOI: 10.1039/D3TC00077J

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