Zintl-phase Eu 2 ZnSb 2 : A promising thermoelectric material with ultralow thermal conductivity
Abstract
Zintl compounds are considered to be potential thermoelectric materials due to their “phonon glass electron crystal” (PGEC) structure. A promising Zintl-phase thermoelectric material, 2-1-2–type Eu 2 ZnSb 2 ( P 6 3 / mmc ), was prepared and investigated. The extremely low lattice thermal conductivity is attributed to the external Eu atomic layers inserted in the [Zn 2 Sb 2 ] 2- network in the structure of 1-2-2–type EuZn 2 Sb 2 , as well as the abundant inversion domain boundary. By regulating the Zn deficiency, the electrical properties are significantly enhanced, and the maximum ZT value reaches ∼1.0 at 823 K for Eu 2 Zn 0.98 Sb 2 . Our discovery provides a class of Zintl thermoelectric materials applicable in the medium-temperature range.
- Authors:
- Publication Date:
- Research Org.:
- Univ. of Houston, TX (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1493466
- Alternate Identifier(s):
- OSTI ID: 1611558
- Grant/Contract Number:
- SC0010831
- Resource Type:
- Published Article
- Journal Name:
- Proceedings of the National Academy of Sciences of the United States of America
- Additional Journal Information:
- Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Volume: 116 Journal Issue: 8; Journal ID: ISSN 0027-8424
- Publisher:
- National Academy of Sciences
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 30 DIRECT ENERGY CONVERSION; Science & Technology
Citation Formats
Chen, Chen, Xue, Wenhua, Li, Shan, Zhang, Zongwei, Li, Xiaofang, Wang, Xinyu, Liu, Yijie, Sui, Jiehe, Liu, Xingjun, Cao, Feng, Ren, Zhifeng, Chu, Ching-Wu, Wang, Yumei, and Zhang, Qian. Zintl-phase Eu 2 ZnSb 2 : A promising thermoelectric material with ultralow thermal conductivity. United States: N. p., 2019.
Web. doi:10.1073/pnas.1819157116.
Chen, Chen, Xue, Wenhua, Li, Shan, Zhang, Zongwei, Li, Xiaofang, Wang, Xinyu, Liu, Yijie, Sui, Jiehe, Liu, Xingjun, Cao, Feng, Ren, Zhifeng, Chu, Ching-Wu, Wang, Yumei, & Zhang, Qian. Zintl-phase Eu 2 ZnSb 2 : A promising thermoelectric material with ultralow thermal conductivity. United States. https://doi.org/10.1073/pnas.1819157116
Chen, Chen, Xue, Wenhua, Li, Shan, Zhang, Zongwei, Li, Xiaofang, Wang, Xinyu, Liu, Yijie, Sui, Jiehe, Liu, Xingjun, Cao, Feng, Ren, Zhifeng, Chu, Ching-Wu, Wang, Yumei, and Zhang, Qian. Mon .
"Zintl-phase Eu 2 ZnSb 2 : A promising thermoelectric material with ultralow thermal conductivity". United States. https://doi.org/10.1073/pnas.1819157116.
@article{osti_1493466,
title = {Zintl-phase Eu 2 ZnSb 2 : A promising thermoelectric material with ultralow thermal conductivity},
author = {Chen, Chen and Xue, Wenhua and Li, Shan and Zhang, Zongwei and Li, Xiaofang and Wang, Xinyu and Liu, Yijie and Sui, Jiehe and Liu, Xingjun and Cao, Feng and Ren, Zhifeng and Chu, Ching-Wu and Wang, Yumei and Zhang, Qian},
abstractNote = {Zintl compounds are considered to be potential thermoelectric materials due to their “phonon glass electron crystal” (PGEC) structure. A promising Zintl-phase thermoelectric material, 2-1-2–type Eu 2 ZnSb 2 ( P 6 3 / mmc ), was prepared and investigated. The extremely low lattice thermal conductivity is attributed to the external Eu atomic layers inserted in the [Zn 2 Sb 2 ] 2- network in the structure of 1-2-2–type EuZn 2 Sb 2 ( P 3 ¯ m 1 ) , as well as the abundant inversion domain boundary. By regulating the Zn deficiency, the electrical properties are significantly enhanced, and the maximum ZT value reaches ∼1.0 at 823 K for Eu 2 Zn 0.98 Sb 2 . Our discovery provides a class of Zintl thermoelectric materials applicable in the medium-temperature range.},
doi = {10.1073/pnas.1819157116},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 8,
volume = 116,
place = {United States},
year = {Mon Feb 04 00:00:00 EST 2019},
month = {Mon Feb 04 00:00:00 EST 2019}
}
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https://doi.org/10.1073/pnas.1819157116
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