Studies on the Bi[subscript 2]Te[subscript 3]–Bi[subscript 2]Se[subscript 3]–Bi[subscript 2]S[subscript 3] system for mid-temperature thermoelectric energy conversion
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Paper11_W. S. Liu_ EES.pdf
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Author(s)
Liu, Weishu
Lukas, Kevin
McEnaney, Kenneth
Lee, Sangyeop
Zhang, Qian
Opeil, Cyril
Chen, Gang
Ren, Zhifeng
Date Issued
November 2012
Journal
Energy & Environmental Science
Publisher
Royal Society of Chemistry
Citation
Liu, Weishu, Kevin C. Lukas, Kenneth McEnaney, Sangyeop Lee, Qian Zhang, Cyril P. Opeil, Gang Chen, and Zhifeng Ren. “Studies on the Bi2Te3–Bi2Se3–Bi2S3 System for Mid-Temperature Thermoelectric Energy Conversion.” Energy & Environmental Science 6, no. 2 (2013): 552.
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Author's final manuscript
Abstract
Bismuth telluride (Bi[subscript 2]Te[subscript 3]) and its alloys have been widely investigated as thermoelectric materials for cooling applications at around room temperature. We report a systematic study on many compounds in the Bi[subscript 2]Te[subscript 3]–Bi[subscript 2]Se[subscript 3]–Bi[subscript 2]S[subscript 3] system. All the samples were fabricated by high energy ball milling followed by hot pressing. Among the investigated compounds, Bi[subscript 2]Te[subscript 2]S[subscript 1] shows a peak ZT ~0.8 at 300 °C and Bi[subscript 2]Se[subscript 1]S[subscript 2] ~0.8 at 500 °C. The results show that these compounds can be used for mid-temperature power generation applications. The leg efficiency of thermoelectric conversion for segmented elements based on these n-type materials could potentially reach 12.5% with a cold side at 25 °C and a hot side at 500 °C if appropriate p-type legs are paired, which could compete well with the state-of-the-art n-type materials within the same temperature range, including lead tellurides, lead selenides, lead sulfides, filled-skutterudites, and half Heuslers.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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DOI of Published Version
https://doi.org/10.1039/c2ee23549h
