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Achieving high power factor and output power density in p-type half-Heuslers Nb

Author(s)
He, Ran; Kraemer, Daniel; Mao, Jun; Zeng, Lingping; Jie, Qing; Lan, Yucheng; Li, Chunhua; Shuai, Jing; Kim, Hee Seok; Liu, Yuan; Broido, David; Chu, Ching-Wu; Chen, Gang; Ren, Zhifeng; ... Show more Show less
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Abstract
Improvements in thermoelectric material performance over the past two decades have largely been based on decreasing the phonon thermal conductivity. Enhancing the power factor has been less successful in comparison. In this work, a peak power factor of ∼106 μW⋅cm⁻¹⋅K⁻² is achieved by increasing the hot pressing temperature up to 1,373 K in the p-type half-Heusler Nb[subscript 0.95]Ti[subscript 0.05]FeSb. The high power factor subsequently yields a record output power density of ∼22 W⋅cm⁻² based on a single-leg device operating at between 293 K and 868 K. Such a high-output power density can be beneficial for large-scale power generation applications.
Date issued
2016-11
URI
http://hdl.handle.net/1721.1/108823
Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Journal
Proceedings of the National Academy of Sciences
Publisher
National Academy of Sciences (U.S.)
Citation
He, Ran; Kraemer, Daniel; Mao, Jun; Zeng, Lingping; Jie, Qing; Lan, Yucheng; Li, Chunhua, et al. “Achieving High Power Factor and Output Power Density in p-Type Half-Heuslers Nb1-xTixFeSb.” Proceedings of the National Academy of Sciences 113, no. 48 (November 2016): 13576–13581. © 2016 National Academy of Sciences
Version: Final published version
ISSN
0027-8424
1091-6490

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