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Title: Temperature dependent thermoelectric properties of cuprous delafossite oxides

Abstract

The use of nanostructured delafossite oxides in thermoelectric (TE) applications has attracted a great interest due to their high performance and long-term stability at elevated temperatures. Cuprous delafossites, CuMO 2 (M=Al, Cr, Fe, Ga, Mn), compared to conventional TE materials, such as Bi 2Te 3, PbTe and SiGe, are non-toxic and more earth abundant. In particular, CuAlO 2 compound shows a great potential for high performance thermoelectric materials. In this work, a systematic study of temperature dependent TE properties of cuprous delafossite materials, CuAlO 2, is reported. The optimization of the TE properties has been realized by controlling nanostructure size around 80 nm CuAlO 2 powder was prepared using a solid-state synthesis method at ~1373 K in nitrogen/air atmosphere. The nanostructure size was controlled by a high energy ball milling process. Reducing the particle size of nanostructured bulk materials decouples interdependent electron and phonon transport and results in a lattice thermal conductivity decrease without deteriorating electrical conductivity. The high effective mass plays a dominant role in the high Seebeck coefficient and low electrical conductivity. The power factor reached ~0.78×10 -5 W/mK 2 at 780 K. Temperature dependent TE properties, including Seebeck coefficient, electrical conductivity, and thermal conductivity are analyzed. Themore » processing-structure-property correlation of these materials are discussed.« less

Authors:
ORCiD logo; ; ; ; ; ORCiD logo;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
Purdue University; National Science Foundation (NSF)
OSTI Identifier:
1481172
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Composites. Part B, Engineering; Journal Volume: 156; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
delafossite oxides; power factor; power generation; thermoelectric

Citation Formats

Feng, Yining, Elquist, Aline, Zhang, Yuepeng, Gao, Kaizhong, Ferguson, Ian, Tzempelikos, Athanasios, and Lu, Na. Temperature dependent thermoelectric properties of cuprous delafossite oxides. United States: N. p., 2019. Web. doi:10.1016/j.compositesb.2018.08.070.
Feng, Yining, Elquist, Aline, Zhang, Yuepeng, Gao, Kaizhong, Ferguson, Ian, Tzempelikos, Athanasios, & Lu, Na. Temperature dependent thermoelectric properties of cuprous delafossite oxides. United States. doi:10.1016/j.compositesb.2018.08.070.
Feng, Yining, Elquist, Aline, Zhang, Yuepeng, Gao, Kaizhong, Ferguson, Ian, Tzempelikos, Athanasios, and Lu, Na. Tue . "Temperature dependent thermoelectric properties of cuprous delafossite oxides". United States. doi:10.1016/j.compositesb.2018.08.070.
@article{osti_1481172,
title = {Temperature dependent thermoelectric properties of cuprous delafossite oxides},
author = {Feng, Yining and Elquist, Aline and Zhang, Yuepeng and Gao, Kaizhong and Ferguson, Ian and Tzempelikos, Athanasios and Lu, Na},
abstractNote = {The use of nanostructured delafossite oxides in thermoelectric (TE) applications has attracted a great interest due to their high performance and long-term stability at elevated temperatures. Cuprous delafossites, CuMO2 (M=Al, Cr, Fe, Ga, Mn), compared to conventional TE materials, such as Bi2Te3, PbTe and SiGe, are non-toxic and more earth abundant. In particular, CuAlO2 compound shows a great potential for high performance thermoelectric materials. In this work, a systematic study of temperature dependent TE properties of cuprous delafossite materials, CuAlO2, is reported. The optimization of the TE properties has been realized by controlling nanostructure size around 80 nm CuAlO2 powder was prepared using a solid-state synthesis method at ~1373 K in nitrogen/air atmosphere. The nanostructure size was controlled by a high energy ball milling process. Reducing the particle size of nanostructured bulk materials decouples interdependent electron and phonon transport and results in a lattice thermal conductivity decrease without deteriorating electrical conductivity. The high effective mass plays a dominant role in the high Seebeck coefficient and low electrical conductivity. The power factor reached ~0.78×10-5 W/mK2 at 780 K. Temperature dependent TE properties, including Seebeck coefficient, electrical conductivity, and thermal conductivity are analyzed. The processing-structure-property correlation of these materials are discussed.},
doi = {10.1016/j.compositesb.2018.08.070},
journal = {Composites. Part B, Engineering},
number = C,
volume = 156,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 2019},
month = {Tue Jan 01 00:00:00 EST 2019}
}