Mechanochemical synthesis of high thermoelectric performance bulk Cu2X (X = S, Se) materials
Abstract
We devised a single-step mechanochemical synthesis/densification procedure for Cu2X (X = S, Se) thermoelectric materials via applying a pressure of 3 GPa to a stoichiometric admixture of elemental Cu and X for 3 min at room temperature. The obtained bulk materials were single-phase, nearly stoichiometric structures with a relative packing density of 97% or higher. The structures contained high concentration of atomic scale defects and pores of 20-200 nm diameter. The above attributes gave rise to a high thermoelectric performance: at 873 K, the ZT value of Cu2S reached 1.07, about 2.1 times the value typical of samples grown from the melt. The ZT value of Cu2Se samples reached in excess of 1.2, close to the state-of-the-art value.
- Authors:
-
- Wuhan Univ. of Technology (China). State Key Lab. of Advanced Technology for Materials Synthesis and Processing
- Clemson Univ., SC (United States)
- Univ. of Michigan, Ann Arbor, MI (United States)
- Publication Date:
- Research Org.:
- Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1426433
- Grant/Contract Number:
- PI0000012
- Resource Type:
- Accepted Manuscript
- Journal Name:
- APL Materials
- Additional Journal Information:
- Journal Volume: 4; Journal Issue: 11; Journal ID: ISSN 2166-532X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Yang, Dongwang, Su, Xianli, Yan, Yonggao, He, Jian, Uher, Ctirad, and Tang, Xinfeng. Mechanochemical synthesis of high thermoelectric performance bulk Cu2X (X = S, Se) materials. United States: N. p., 2016.
Web. doi:10.1063/1.4968521.
Yang, Dongwang, Su, Xianli, Yan, Yonggao, He, Jian, Uher, Ctirad, & Tang, Xinfeng. Mechanochemical synthesis of high thermoelectric performance bulk Cu2X (X = S, Se) materials. United States. https://doi.org/10.1063/1.4968521
Yang, Dongwang, Su, Xianli, Yan, Yonggao, He, Jian, Uher, Ctirad, and Tang, Xinfeng. Tue .
"Mechanochemical synthesis of high thermoelectric performance bulk Cu2X (X = S, Se) materials". United States. https://doi.org/10.1063/1.4968521. https://www.osti.gov/servlets/purl/1426433.
@article{osti_1426433,
title = {Mechanochemical synthesis of high thermoelectric performance bulk Cu2X (X = S, Se) materials},
author = {Yang, Dongwang and Su, Xianli and Yan, Yonggao and He, Jian and Uher, Ctirad and Tang, Xinfeng},
abstractNote = {We devised a single-step mechanochemical synthesis/densification procedure for Cu2X (X = S, Se) thermoelectric materials via applying a pressure of 3 GPa to a stoichiometric admixture of elemental Cu and X for 3 min at room temperature. The obtained bulk materials were single-phase, nearly stoichiometric structures with a relative packing density of 97% or higher. The structures contained high concentration of atomic scale defects and pores of 20-200 nm diameter. The above attributes gave rise to a high thermoelectric performance: at 873 K, the ZT value of Cu2S reached 1.07, about 2.1 times the value typical of samples grown from the melt. The ZT value of Cu2Se samples reached in excess of 1.2, close to the state-of-the-art value.},
doi = {10.1063/1.4968521},
journal = {APL Materials},
number = 11,
volume = 4,
place = {United States},
year = {Tue Nov 01 00:00:00 EDT 2016},
month = {Tue Nov 01 00:00:00 EDT 2016}
}
Web of Science
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