Low lattice thermal conductivity and enhanced thermoelectric performance of SnTe via chemical electroless plating of Ag
Article
Article Title | Low lattice thermal conductivity and enhanced thermoelectric performance of SnTe via chemical electroless plating of Ag |
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ERA Journal ID | 4828 |
Article Category | Article |
Authors | Tian, Bang-Zhou, Jiang, Xu-Ping, Chen, Jie, Gao, Han, Wang, Ze-Gao, Tang, Jun, Zhou, Da-Li, Yang, Lei and Chen, Zhi-Gang |
Journal Title | Rare Metals |
Journal Citation | 41 (1), pp. 86-95 |
Number of Pages | 10 |
Year | 2022 |
Publisher | Springer |
Place of Publication | China |
ISSN | 0258-7076 |
1001-0521 | |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s12598-021-01805-1 |
Web Address (URL) | https://link.springer.com/article/10.1007/s12598-021-01805-1 |
Abstract | Interface engineering has been regarded as an effective strategy to manipulate the thermoelectric performance of materials. Here, we use a facile chemical electroless plating and a spark plasma sintering process to fabricate Ag-plated SnTe bulk. After sintering, a small amount of plated Ag can be doped into SnTe to suppress the Sn vacancies and the others form Ag precipitates with a size distribution from nanoscale to microscale, which introduces Ag/SnTe interfaces to enhance the Seebeck coefficient via energy filtering effect. Simultaneously, these structures result in strong scattering to reach a low lattice thermal conductivity of ~ 0.62 W·m–1·K–1. Consequently, a maximum figure of merit (zT) of ~ 0.67 at 823 K is achieved in 2 wt% Ag-plated SnTe, which is ~ 60% higher than that of pristine SnTe. Moreover, the microhardness indentation test results show that the mean microhardness of 2 wt% Ag-plated SnTe is HV 64.26, which is much higher than that of pristine SnTe, indicating that Ag electroless plating can improve the mechanical properties of SnTe. This work has provided a facile and eco-friendly method to realize the interface engineering for manipulating the thermoelectric and mechanical properties of SnTe. |
Keywords | thermoelectric performance; nanoscale ; microscale |
ANZSRC Field of Research 2020 | 401605. Functional materials |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Sichuan University, China |
Zhengzhou University, China | |
Centre for Future Materials |
https://research.usq.edu.au/item/z02wv/low-lattice-thermal-conductivity-and-enhanced-thermoelectric-performance-of-snte-via-chemical-electroless-plating-of-ag
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