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Title: Panoscopic approach for high-performance Te-doped skutterudite

Abstract

One-step plasma-activated sintering (OS-PAS) fabrication of single-phase high-performance CoSb3-based skutterudite thermoelectric material with a hierarchical structure on a time scale of a few minutes is first reported here. The formation mechanism of the CoSb3 phase and the effects of the current and pressure fields on the phase transformation and microstructure evolution are studied in the one-step PAS process. The application of the panoscopic approach to this system and its effect on the transport properties are investigated. The results show that the hierarchical structure forms during the formation of the skutterudite phase under the effects of both current and sintering pressure. The samples fabricated by the OS-PAS technique have defined hierarchical structures, which scatter phonons more intensely over a broader range of frequencies and significantly reduce the lattice thermal conductivity. High-performance bulk Te-doped skutterudite with the maximum ZT of 1.1 at 820 K for the composition oSb2.875Te0.125 was obtained. Such high ZT values rival those obtained from single filled skutterudites. This newly developed OS-PAS technique enhances the thermoelectric performance, dramatically shortens the synthesis period and provides a facile method for obtaining hierarchical thermoelectric materials on a large scale.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [2];  [3];  [1]
  1. Wuhan Univ. of Technology, Hubei (China). State Key Lab. of Advanced Technology for Materials Synthesis and Processing
  2. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Physics
  3. Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry
Publication Date:
Research Org.:
Wuhan Univ. of Technology, Hubei (China); Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); National Basic Research Program of China; Natural Science Foundation of China; 111 Project of China; USDOE
Contributing Org.:
Northwestern Univ., Evanston, IL (United States)
OSTI Identifier:
1356109
Alternate Identifier(s):
OSTI ID: 1362283
Grant/Contract Number:  
PI0000012; 2013CB632502; 51172174; 51402222; 51521001; 51632006; B07040
Resource Type:
Accepted Manuscript
Journal Name:
NPG Asia Materials (Online)
Additional Journal Information:
Journal Name: NPG Asia Materials (Online); Journal Volume: 9; Journal Issue: 2; Journal ID: ISSN 1884-4057
Publisher:
Nature Publishing Group Asia
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Liang, Tao, Su, Xianli, Yan, Yonggao, Zheng, Gang, She, Xiaoyu, You, Yonghui, Uher, Ctirad, Kanatzidis, Mercouri G., and Tang, Xinfeng. Panoscopic approach for high-performance Te-doped skutterudite. United States: N. p., 2017. Web. https://doi.org/10.1038/am.2017.1.
Liang, Tao, Su, Xianli, Yan, Yonggao, Zheng, Gang, She, Xiaoyu, You, Yonghui, Uher, Ctirad, Kanatzidis, Mercouri G., & Tang, Xinfeng. Panoscopic approach for high-performance Te-doped skutterudite. United States. https://doi.org/10.1038/am.2017.1
Liang, Tao, Su, Xianli, Yan, Yonggao, Zheng, Gang, She, Xiaoyu, You, Yonghui, Uher, Ctirad, Kanatzidis, Mercouri G., and Tang, Xinfeng. Fri . "Panoscopic approach for high-performance Te-doped skutterudite". United States. https://doi.org/10.1038/am.2017.1. https://www.osti.gov/servlets/purl/1356109.
@article{osti_1356109,
title = {Panoscopic approach for high-performance Te-doped skutterudite},
author = {Liang, Tao and Su, Xianli and Yan, Yonggao and Zheng, Gang and She, Xiaoyu and You, Yonghui and Uher, Ctirad and Kanatzidis, Mercouri G. and Tang, Xinfeng},
abstractNote = {One-step plasma-activated sintering (OS-PAS) fabrication of single-phase high-performance CoSb3-based skutterudite thermoelectric material with a hierarchical structure on a time scale of a few minutes is first reported here. The formation mechanism of the CoSb3 phase and the effects of the current and pressure fields on the phase transformation and microstructure evolution are studied in the one-step PAS process. The application of the panoscopic approach to this system and its effect on the transport properties are investigated. The results show that the hierarchical structure forms during the formation of the skutterudite phase under the effects of both current and sintering pressure. The samples fabricated by the OS-PAS technique have defined hierarchical structures, which scatter phonons more intensely over a broader range of frequencies and significantly reduce the lattice thermal conductivity. High-performance bulk Te-doped skutterudite with the maximum ZT of 1.1 at 820 K for the composition oSb2.875Te0.125 was obtained. Such high ZT values rival those obtained from single filled skutterudites. This newly developed OS-PAS technique enhances the thermoelectric performance, dramatically shortens the synthesis period and provides a facile method for obtaining hierarchical thermoelectric materials on a large scale.},
doi = {10.1038/am.2017.1},
journal = {NPG Asia Materials (Online)},
number = 2,
volume = 9,
place = {United States},
year = {2017},
month = {2}
}

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