Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/143413
Title: High-performance thermoelectrics from cellular nanostructured Sb2Si2Te6
Authors: Luo, Yubo
Cai, Songting
Hao, Shiqiang
Pielnhofer, Florian
Hadar, Ido
Luo, Zhong-Zhen
Xu, Jianwei
Wolverton, Chris
Dravid, Vinayak P.
Pfitzner, Arno
Yan, Qingyu
Kanatzidis, Mercouri G.
Keywords: Engineering::Materials::Energy materials
Issue Date: 2020
Source: Luo, Y., Cai, S., Hao, S., Pielnhofer, F., Hadar, I., Luo, Z.-Z., ... Kanatzidis, M. G. (2020). High-performance thermoelectrics from cellular nanostructured Sb2Si2Te6. Joule, 4(1), 159-175. doi:10.1016/j.joule.2019.10.010
Journal: Joule
Abstract: Thermoelectric materials promise to create additional efficiencies in energy management by harvesting the energy of waste heat and converting it to electricity. We introduce 2D Sb2Si2Te6 as a promising new high-performance thermoelectric material. Sb2Si2Te6 exhibits an intrinsically high thermoelectric figure of merit ZT value of ∼1.08 at 823 K. We then devise a unique cellular nanostructure by a post-synthetic reaction strategy that forms in situ Si2Te3 nanosheets, which serve as an effective barrier to heat propagation, yielding an ∼40% reduction in the already very low lattice thermal conductivity to ∼0.29 Wm−1K−1 at 823 K. The cellular nanostructure enables a very high ZT value of ∼1.65 at 823 K for this new material and a high average ZT value of 0.98 (400–823 K). We describe the novel cellular nanostructure design and a single-step chemical route to achieve it, highlighting a potentially new and effective general design strategy for achieving high thermoelectric performance.
URI: https://hdl.handle.net/10356/143413
ISSN: 2542-4351
DOI: 10.1016/j.joule.2019.10.010
Rights: © 2019 Elsevier. All rights reserved. This paper was published in Joule and is made available with permission of Elsevier.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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