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Thermoelectric properties of polycrystalline SnxFeTe2 prepared by atmospheric pressure solid-state reaction

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Abstract

As a transition metal dischalcogenide, FeTe2 has become one of the most widely studied materials due to its abundant electrical, magnetic, and optical properties, and has considerable potential in various technical applications. In this experiment, the thermoelectric properties of Sn doping alloy compound FeTe2 are studied by high-temperature solid-state reaction method. Due to the excessive doping of Sn, the second phase SnTe is introduced into the sample, forming a coexistence structure of FeTe2 and SnTe, which greatly reduces the electrical resistivity of the material. The Seebeck coefficient of the sample reaches 78.79 µV/K under the conditions of 823 K and Sn doping of 0.05. When the synthesis temperature is 823 K and the Sn doping concentration is 0.9, the minimum electrical resistivity obtained is 0.59 mΩ cm, which is only about 8% of the electrical resistivity of pure FeTe2 material. The ZT value of sample Sn0.9FeTe2 reaches a maximum of 2.11 × 10−2 when the test temperature is 573.5 K.

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Data availability

The datasets used or analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

This research was supported by the Scientific Research Cultivation Project (LPSSY2023KJZDPY02), Natural Science Foundation of China (52062031), Materials and Chemicals Direction Team (LPSSY2023XKTD06), Carbon Neutral Engineering Research Center of Guizhou colleges and universities in Coal Industry (Qian Jiao Ji [2023] No. 044), Guizhou Province first-class professional construction point (GZSylzy202103), Youth Fund of Education Department of Guizhou Province (Qianjiaohe KY Zi [2022] No. 050), and Liupanshui Science and Technology Department Foundation (52020-2023-0-2-10).

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Authors and Affiliations

  1. School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, 553004, China

    Yonghua Ji, Lang Zhang, Bingke Qin & Dan Zhao

  2. College of Physical Science and Technology, Dalian University, Dalian, 116622, China

    Lang Zhang & Cheng Sun

Authors
  1. Yonghua Ji
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  2. Lang Zhang
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  3. Bingke Qin
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  4. Dan Zhao
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  5. Cheng Sun
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Contributions

YJ contributed toward writing—original draft, methodology, and investigation. LZ contributed toward writing—review & data curation. BQ contributed toward investigation, funding acquisition, supervision, and writing—review & editing. DZ contributed toward funding acquisition and data curation. CS contributed toward writing—review & data curation, and investigation. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Bingke Qin.

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Ji, Y., Zhang, L., Qin, B. et al. Thermoelectric properties of polycrystalline SnxFeTe2 prepared by atmospheric pressure solid-state reaction. J Mater Sci: Mater Electron 34, 2331 (2023). https://doi.org/10.1007/s10854-023-11757-0

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