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Title: Mechanochemical synthesis of high thermoelectric performance bulk Cu 2X (X = S, Se) materials

Abstract

We devised a single-step mechanochemical synthesis/densification procedure for Cu 2X (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 Cu 2Se samples reached in excess of 1.2, close to the state-of-the-art value.

Authors:
 [1];  [1];  [1];  [2];  [3];  [1]
  1. Wuhan Univ. of Technology (China). State Key Lab. of Advanced Technology for Materials Synthesis and Processing
  2. Clemson Univ., SC (United States)
  3. 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:
Journal Article: 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. doi: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. doi: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},
issn = {2166-532X},
number = 11,
volume = 4,
place = {United States},
year = {2016},
month = {11}
}

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Cited by: 4 works
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Works referenced in this record:

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journal, January 2001


Sintering, consolidation, reaction and crystal growth by the spark plasma system (SPS)
journal, August 2000


Ultralow thermal conductivity and high thermoelectric figure of merit in SnSe crystals
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Copper ion liquid-like thermoelectrics
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