Ultrahigh Power Factor in Thermoelectric System Nb 0.95 M 0.05 FeSb (M = Hf, Zr, and Ti)
Abstract
Abstract Conversion efficiency and output power are crucial parameters for thermoelectric power generation that highly rely on figure of merit ZT and power factor (PF), respectively. Therefore, the synergistic optimization of electrical and thermal properties is imperative instead of optimizing just ZT by thermal conductivity reduction or just PF by electron transport enhancement. Here, it is demonstrated that Nb 0.95 Hf 0.05 FeSb has not only ultrahigh PF over ≈100 µW cm −1 K −2 at room temperature but also the highest ZT in a material system Nb 0.95 M 0.05 FeSb (M = Hf, Zr, Ti). It is found that Hf dopant is capable to simultaneously supply carriers for mobility optimization and introduce atomic disorder for reducing lattice thermal conductivity. As a result, Nb 0.95 Hf 0.05 FeSb distinguishes itself from other outstanding NbFeSb‐based materials in both the PF and ZT . Additionally, a large output power density of ≈21.6 W cm −2 is achieved based on a single‐leg device under a temperature difference of ≈560 K, showing the realistic prospect of the ultrahigh PF for power generation.
- Authors:
-
[2]
- Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu 610054 China, Department of Physics and Texas Center for Superconductivity University of Houston Houston TX 77204 USA
- Department of Physics and Texas Center for Superconductivity University of Houston Houston TX 77204 USA
- Institute for Metallic Materials IFW‐Dresden Dresden 01069 Germany
- State Key Laboratory of Electronic Thin Films and Integrated Devices School of Microelectronics and Solid‐state Electronics University of Electronic Science and Technology of China Chengdu 611731 China
- Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu 610054 China
- Publication Date:
- Research Org.:
- Univ of Houston System, 4800 Calhoun, Houston Texas 77004, United States
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1435846
- Alternate Identifier(s):
- OSTI ID: 1435847; OSTI ID: 1498959
- Grant/Contract Number:
- SC0010831
- Resource Type:
- Published Article
- Journal Name:
- Advanced Science
- Additional Journal Information:
- Journal Name: Advanced Science Journal Volume: 5 Journal Issue: 7; Journal ID: ISSN 2198-3844
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 24 POWER TRANSMISSION AND DISTRIBUTION; half-Heusler compounds; power generation; simultaneous optimization; thermoelectric materials
Citation Formats
Ren, Wuyang, Zhu, Hangtian, Zhu, Qing, Saparamadu, Udara, He, Ran, Liu, Zihang, Mao, Jun, Wang, Chao, Nielsch, Kornelius, Wang, Zhiming, and Ren, Zhifeng. Ultrahigh Power Factor in Thermoelectric System Nb 0.95 M 0.05 FeSb (M = Hf, Zr, and Ti). Germany: N. p., 2018.
Web. doi:10.1002/advs.201800278.
Ren, Wuyang, Zhu, Hangtian, Zhu, Qing, Saparamadu, Udara, He, Ran, Liu, Zihang, Mao, Jun, Wang, Chao, Nielsch, Kornelius, Wang, Zhiming, & Ren, Zhifeng. Ultrahigh Power Factor in Thermoelectric System Nb 0.95 M 0.05 FeSb (M = Hf, Zr, and Ti). Germany. https://doi.org/10.1002/advs.201800278
Ren, Wuyang, Zhu, Hangtian, Zhu, Qing, Saparamadu, Udara, He, Ran, Liu, Zihang, Mao, Jun, Wang, Chao, Nielsch, Kornelius, Wang, Zhiming, and Ren, Zhifeng. Wed .
"Ultrahigh Power Factor in Thermoelectric System Nb 0.95 M 0.05 FeSb (M = Hf, Zr, and Ti)". Germany. https://doi.org/10.1002/advs.201800278.
@article{osti_1435846,
title = {Ultrahigh Power Factor in Thermoelectric System Nb 0.95 M 0.05 FeSb (M = Hf, Zr, and Ti)},
author = {Ren, Wuyang and Zhu, Hangtian and Zhu, Qing and Saparamadu, Udara and He, Ran and Liu, Zihang and Mao, Jun and Wang, Chao and Nielsch, Kornelius and Wang, Zhiming and Ren, Zhifeng},
abstractNote = {Abstract Conversion efficiency and output power are crucial parameters for thermoelectric power generation that highly rely on figure of merit ZT and power factor (PF), respectively. Therefore, the synergistic optimization of electrical and thermal properties is imperative instead of optimizing just ZT by thermal conductivity reduction or just PF by electron transport enhancement. Here, it is demonstrated that Nb 0.95 Hf 0.05 FeSb has not only ultrahigh PF over ≈100 µW cm −1 K −2 at room temperature but also the highest ZT in a material system Nb 0.95 M 0.05 FeSb (M = Hf, Zr, Ti). It is found that Hf dopant is capable to simultaneously supply carriers for mobility optimization and introduce atomic disorder for reducing lattice thermal conductivity. As a result, Nb 0.95 Hf 0.05 FeSb distinguishes itself from other outstanding NbFeSb‐based materials in both the PF and ZT . Additionally, a large output power density of ≈21.6 W cm −2 is achieved based on a single‐leg device under a temperature difference of ≈560 K, showing the realistic prospect of the ultrahigh PF for power generation.},
doi = {10.1002/advs.201800278},
journal = {Advanced Science},
number = 7,
volume = 5,
place = {Germany},
year = {Wed May 02 00:00:00 EDT 2018},
month = {Wed May 02 00:00:00 EDT 2018}
}
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Figures / Tables:
Figure 1: Comparison of temperature-dependent PF among Nb0.95M0.05FeSb (M = Hf, Zr, Ti) and other high-performance thermoelectric materials.[10,12,29,33,35,56–59]
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