Issue 2, 2013
From the journal:

Energy & Environmental Science

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

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

* Corresponding authors

a Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA
E-mail: renzh@bc.edu
Fax: +1-617-552-8478
Tel: +1-617-552-2832

b Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
E-mail: gchen2@mit.edu
Fax: +1-617-324-5519
Tel: +1-617-253-0006

Abstract

Bismuth telluride (Bi2Te3) 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 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.

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

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Article information

DOI
https://doi.org/10.1039/C2EE23549H
Article type
Paper
Submitted
19 Sep 2012
Accepted
21 Nov 2012
First published
22 Nov 2012

Energy Environ. Sci., 2013,6, 552-560

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

W. Liu, K. C. Lukas, K. McEnaney, S. Lee, Q. Zhang, C. P. Opeil, G. Chen and Z. Ren, Energy Environ. Sci., 2013, 6, 552 DOI: 10.1039/C2EE23549H

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