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A new thermoelectric Ag8SiSe6 Argyrodite for room temperature application: its cooling conditions sensitivity of thermoelectric performance

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posted on 2024-03-18, 11:41 authored by Bo Wang, Suwei Li, Yubo Luo, Junyou Yang, Haitao YeHaitao Ye, Yong Liu, Qinghui Jiang

The present commercial thermoelectrics like (BiSb)2Te3 compounds include expensive and toxic Te element, which hampers a large-scale thermoelectric application near room temperature. Ag8SiSe6 argyrodite compound, as a green and low cost thermoelectric material, is potential candidate for BiSbTe compounds. In this work, Ag8SiSe6 compounds were synthesized through a traditional melting process combined with a hot pressing densification, marking the first systematic investigation of their thermoelectric properties linking to different post-treatments. By designing the cooling rates of the ingots, a substantial improvement in the power factor has been attained, particularly in the sample quenched in water, due to a marked reduction in resistivity. To our knowledge, although a pure Ag8SiSe6 phase cannot be prepared by possible available fabrication method up to now the current methods, a high-performance thermoelectric material has been fabricated through the integration of ball milling treatment with the quenched ingot, achieving a peak ZT value of approximately 0.71 at 398 K.

Funding

National Natural Science Foundation of China (52273293, 52172187, 51772019, and 51572098).

History

Author affiliation

College of Science & Engineering/Engineering

Version

  • AM (Accepted Manuscript)

Published in

Materials Advances

Publisher

Royal Society of Chemistry (RSC)

eissn

2633-5409

Copyright date

2024

Available date

2024-03-18

Language

en

Deposited by

Professor Haitao Ye

Deposit date

2024-03-17

Rights Retention Statement

  • No

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