High-performance thermoelectrics from cellular nanostructured Sb2Si2Te6
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 thermoelect...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Online Access: | https://hdl.handle.net/10356/143413 |
| _version_ | 1824454068120059904 |
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| author | 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. |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering 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. |
| author_sort | Luo, Yubo |
| collection | NTU |
| description | 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. |
| first_indexed | 2025-02-19T03:16:26Z |
| format | Journal Article |
| id | ntu-10356/143413 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:16:26Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1434132023-07-14T15:59:10Z High-performance thermoelectrics from cellular nanostructured Sb2Si2Te6 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. School of Materials Science and Engineering Engineering::Materials::Energy materials Sb2Si2Te6 Thermoelectric 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. Ministry of Education (MOE) Accepted version This work was supported by the Department of Energy, Office of Science Basic Energy Sciences under grant DE-SC0014520, DOE Office of Science (sample preparation, synthesis, XRD, TE measurements, TEM measurements, DFT calculations), and by the Deutsche Forschungsgemeinschaft DFG in the framework of SPP 1666 under grant PF 324/4-1. This work made use of the EPIC facilities of Northwestern’s NUANCE Center, which has received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205); the MRSEC program (NSF DMR-1720139) at the Materials Research Center; the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN. User Facilities are supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-06CH11357 and DE-AC02-05CH11231; the ONR funding-APS measurements (ONR grant N00014-18-1-2102). Access to facilities of high performance computational resources at the Northwestern University is acknowledged. The authors also acknowledge National Natural Science Foundation of China (61728401), Singapore MOE AcRF Tier 1 under Grant Nos. 2016-T1-002-065, Singapore A*STAR Pharos Program SERC 1527200022, the support from FACTs of Nanyang Technological University for sample analysis. 2020-08-31T05:35:20Z 2020-08-31T05:35:20Z 2020 Journal Article 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 2542-4351 https://hdl.handle.net/10356/143413 10.1016/j.joule.2019.10.010 2-s2.0-85077506007 1 4 159 175 en Joule © 2019 Elsevier. All rights reserved. This paper was published in Joule and is made available with permission of Elsevier. application/pdf |
| spellingShingle | Engineering::Materials::Energy materials Sb2Si2Te6 Thermoelectric 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. High-performance thermoelectrics from cellular nanostructured Sb2Si2Te6 |
| title | High-performance thermoelectrics from cellular nanostructured Sb2Si2Te6 |
| title_full | High-performance thermoelectrics from cellular nanostructured Sb2Si2Te6 |
| title_fullStr | High-performance thermoelectrics from cellular nanostructured Sb2Si2Te6 |
| title_full_unstemmed | High-performance thermoelectrics from cellular nanostructured Sb2Si2Te6 |
| title_short | High-performance thermoelectrics from cellular nanostructured Sb2Si2Te6 |
| title_sort | high performance thermoelectrics from cellular nanostructured sb2si2te6 |
| topic | Engineering::Materials::Energy materials Sb2Si2Te6 Thermoelectric |
| url | https://hdl.handle.net/10356/143413 |
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