Stronger phonon scattering by larger differences in atomic mass and size in p-type half-Heuslers Hf[subscript 1−x]Ti[subscript x]CoSb[subscript 0.8]Sn[subscript 0.2]
High lattice thermal conductivity has been the bottleneck for further improvement of the thermoelectric figure-of-merit (ZT) of half-Heuslers (HHs) Hf[subscript 1−x]Zr[subscript x]CoSb[subscript 0.8]Sn[subscript 0.2]. Theoretically, the lattice thermal conductivity can be reduced by exploring larger...
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Royal Society of Chemistry
2014
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| Online Access: | http://hdl.handle.net/1721.1/86909 https://orcid.org/0000-0002-3968-8530 |
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| author | Yan, Xiao Liu, Weishu Wang, Hui Chen, Shuo Shiomi, Junichiro Esfarjani, Keivan Wang, Hengzhi Wang, Dezhi Chen, Gang Ren, Zhifeng |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Yan, Xiao Liu, Weishu Wang, Hui Chen, Shuo Shiomi, Junichiro Esfarjani, Keivan Wang, Hengzhi Wang, Dezhi Chen, Gang Ren, Zhifeng |
| author_sort | Yan, Xiao |
| collection | MIT |
| description | High lattice thermal conductivity has been the bottleneck for further improvement of the thermoelectric figure-of-merit (ZT) of half-Heuslers (HHs) Hf[subscript 1−x]Zr[subscript x]CoSb[subscript 0.8]Sn[subscript 0.2]. Theoretically, the lattice thermal conductivity can be reduced by exploring larger differences in the atomic mass and size in the crystal structure, leading to higher ZT. In this paper, we experimentally demonstrated that a lower thermal conductivity in p-type half-Heuslers can be achieved when Ti is used to replace Zr, i.e., Hf[subscript 1−x]Ti[subscript x]CoSb[subscript 0.8]Sn[subscript 0.2], due to larger differences in the atomic mass and size between Hf and Ti compared with Hf and Zr. The highest ZT peak, ~1.0 at 800 °C, in the Hf[subscript 1−x]Ti[subscript x]CoSb[subscript 0.8]Sn[subscript 0.2] (x = 0.1, 0.2, 0.3, and 0.5) system was achieved using Hf[subscript 0.8]Ti[subscript 0.2]CoSb[subscript 0.8]Sn[subscript 0.2], which makes this material useful in power generation applications. |
| first_indexed | 2024-09-23T09:33:22Z |
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| id | mit-1721.1/86909 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:33:22Z |
| publishDate | 2014 |
| publisher | Royal Society of Chemistry |
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| spelling | mit-1721.1/869092022-09-26T12:12:07Z Stronger phonon scattering by larger differences in atomic mass and size in p-type half-Heuslers Hf[subscript 1−x]Ti[subscript x]CoSb[subscript 0.8]Sn[subscript 0.2] Yan, Xiao Liu, Weishu Wang, Hui Chen, Shuo Shiomi, Junichiro Esfarjani, Keivan Wang, Hengzhi Wang, Dezhi Chen, Gang Ren, Zhifeng Massachusetts Institute of Technology. Department of Mechanical Engineering Chen, Gang Shiomi, Junichiro Esfarjani, Keivan Chen, Gang High lattice thermal conductivity has been the bottleneck for further improvement of the thermoelectric figure-of-merit (ZT) of half-Heuslers (HHs) Hf[subscript 1−x]Zr[subscript x]CoSb[subscript 0.8]Sn[subscript 0.2]. Theoretically, the lattice thermal conductivity can be reduced by exploring larger differences in the atomic mass and size in the crystal structure, leading to higher ZT. In this paper, we experimentally demonstrated that a lower thermal conductivity in p-type half-Heuslers can be achieved when Ti is used to replace Zr, i.e., Hf[subscript 1−x]Ti[subscript x]CoSb[subscript 0.8]Sn[subscript 0.2], due to larger differences in the atomic mass and size between Hf and Ti compared with Hf and Zr. The highest ZT peak, ~1.0 at 800 °C, in the Hf[subscript 1−x]Ti[subscript x]CoSb[subscript 0.8]Sn[subscript 0.2] (x = 0.1, 0.2, 0.3, and 0.5) system was achieved using Hf[subscript 0.8]Ti[subscript 0.2]CoSb[subscript 0.8]Sn[subscript 0.2], which makes this material useful in power generation applications. United States. Dept. of Energy. Office of Basic Energy Sciences (Solid-State Solar-Thermal Energy Conversion Center Award DE-SC0001299) 2014-05-09T15:33:04Z 2014-05-09T15:33:04Z 2012-04 2012-03 Article http://purl.org/eprint/type/JournalArticle 1754-5692 1754-5706 http://hdl.handle.net/1721.1/86909 Yan, Xiao, Weishu Liu, Hui Wang, Shuo Chen, Junichiro Shiomi, Keivan Esfarjani, Hengzhi Wang, Dezhi Wang, Gang Chen, and Zhifeng Ren. “Stronger Phonon Scattering by Larger Differences in Atomic Mass and Size in p-Type Half-Heuslers Hf1−xTixCoSb0.8Sn0.2.” Energy & Environmental Science 5, no. 6 (2012): 7543. https://orcid.org/0000-0002-3968-8530 en_US http://dx.doi.org/10.1039/c2ee21554c Energy & Environmental Science Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Royal Society of Chemistry Bolin Liao |
| spellingShingle | Yan, Xiao Liu, Weishu Wang, Hui Chen, Shuo Shiomi, Junichiro Esfarjani, Keivan Wang, Hengzhi Wang, Dezhi Chen, Gang Ren, Zhifeng Stronger phonon scattering by larger differences in atomic mass and size in p-type half-Heuslers Hf[subscript 1−x]Ti[subscript x]CoSb[subscript 0.8]Sn[subscript 0.2] |
| title | Stronger phonon scattering by larger differences in atomic mass and size in p-type half-Heuslers Hf[subscript 1−x]Ti[subscript x]CoSb[subscript 0.8]Sn[subscript 0.2] |
| title_full | Stronger phonon scattering by larger differences in atomic mass and size in p-type half-Heuslers Hf[subscript 1−x]Ti[subscript x]CoSb[subscript 0.8]Sn[subscript 0.2] |
| title_fullStr | Stronger phonon scattering by larger differences in atomic mass and size in p-type half-Heuslers Hf[subscript 1−x]Ti[subscript x]CoSb[subscript 0.8]Sn[subscript 0.2] |
| title_full_unstemmed | Stronger phonon scattering by larger differences in atomic mass and size in p-type half-Heuslers Hf[subscript 1−x]Ti[subscript x]CoSb[subscript 0.8]Sn[subscript 0.2] |
| title_short | Stronger phonon scattering by larger differences in atomic mass and size in p-type half-Heuslers Hf[subscript 1−x]Ti[subscript x]CoSb[subscript 0.8]Sn[subscript 0.2] |
| title_sort | stronger phonon scattering by larger differences in atomic mass and size in p type half heuslers hf subscript 1 x ti subscript x cosb subscript 0 8 sn subscript 0 2 |
| url | http://hdl.handle.net/1721.1/86909 https://orcid.org/0000-0002-3968-8530 |
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