Crowding-out effect strategy using AgCl for realizing a super low lattice thermal conductivity of SnTe
Article
Article Title | Crowding-out effect strategy using AgCl for realizing a super low lattice thermal conductivity of SnTe |
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ERA Journal ID | 214258 |
Article Category | Article |
Authors | Wang, Lijun (Author), Hong, Min (Author), Kawami, Youichirou (Author), Sun, Qiang (Author), Nguyen, Van Thuong (Author), Wang, Yuan (Author), Yue, Luo (Author), Zheng, Shuqi (Author), Zhu, Zhonghua (Author), Zou, Jin (Author) and Chen, Zhi-Gang (Author) |
Journal Title | Sustainable Materials and Technologies |
Journal Citation | 25, pp. 1-7 |
Article Number | e00183 |
Number of Pages | 7 |
Year | 2020 |
Publisher | Elsevier BV |
Place of Publication | Netherlands |
ISSN | 2214-9929 |
2214-9937 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.susmat.2020.e00183 |
Web Address (URL) | https://www.sciencedirect.com/science/article/abs/pii/S2214993720300294 |
Abstract | Recent studies have shown that SnTe is an attractive thermoelectric material, particularly after band engineering and/or all-scale hierarchical architecturing. In this study, SnTe microcrystals have been firstly synthesized by using a microwave-stimulated wet-chemical method, and then mixed with AgCl for spark plasma sintering. The crowding-out of AgCl induces all length scale hierarchical structures in the sintered SnTe-AgCl pellets, which include the point defects, dislocations, nanopores, and grain boundaries. Such hierarchical structures suppress the transport of phonons and result in a super-low lattice thermal conductivity of ~0.31 Wm−1 K−1 at 775 K in (SnTe)0.95(AgCl)0.05. Moreover, the decomposed AgCl induces cation doping to improve the electrical transport properties of the sintered pellets. Thus, a maximum figure of merit, ZT of ~0.51 at 773 K can be obtained with a composition of (SnTe)0.95(AgCl)0.05, which is 55% higher than that of the pristine SnTe. Our strategy enables to further increase the thermoelectric properties of thermoelectric materials. |
Keywords | Microwave-assisted solvothermal method; Crowding-out effect; All length scale hierarchical structure; Thermoelectric materials |
ANZSRC Field of Research 2020 | 401605. Functional materials |
510404. Electronic and magnetic properties of condensed matter; superconductivity | |
Byline Affiliations | Centre for Future Materials |
University of Queensland | |
China University of Petroleum, China | |
Institution of Origin | University of Southern Queensland |
Funding source | Australian Research Council (ARC) |
https://research.usq.edu.au/item/q610z/crowding-out-effect-strategy-using-agcl-for-realizing-a-super-low-lattice-thermal-conductivity-of-snte
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