Studies on the Bi2Te3–Bi2Se3–Bi2S3 system for mid-temperature thermoelectric energy conversion

Liu, Weishu; Lukas, Kevin C.; McEnaney, Kenneth; Lee, Sangyeop; Zhang, Qian; Opeil, Cyril P.; Chen, Gang; Ren, Zhifeng

doi:10.1039/C2EE23549H

Title: Studies on the Bi₂Te₃–Bi₂Se₃–Bi₂S₃ system for mid-temperature thermoelectric energy conversion

Journal Article · Thu Nov 22 00:00:00 EST 2012 · Energy & Environmental Science

DOI:https://doi.org/10.1039/C2EE23549H· OSTI ID:1381942

Liu, Weishu ^[1]; Lukas, Kevin C. ^[1]; McEnaney, Kenneth ^[2]; Lee, Sangyeop ^[2]; Zhang, Qian ^[1]; Opeil, Cyril P. ^[1]; Chen, Gang ^[2]; Ren, Zhifeng ^[1]

Boston College, Chestnut Hill, MA (United States). Dept. of Physics
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Mechanical Engineering

Bismuth telluride (Bi₂Te₃) and its alloys have been widely investigated as thermoelectric materials for cooling applications at around room temperature. We report here a systematic study on many compounds in the Bi₂Te₃–Bi₂Se₃–Bi₂S₃ system. All the samples were fabricated by high energy ball milling followed by hot pressing. Among the investigated compounds, Bi₂Te₂S₁ shows a peak ZT ~0.8 at 300 °C and Bi₂Se₁S₂ ~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.

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Research Organization:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0001299; FG02-09ER46577

OSTI ID:: 1381942

Journal Information:: Energy & Environmental Science, Vol. 6, Issue 2; ISSN 1754-5692

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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