TY - JOUR
T1 - Colloid Chemical Approach for Fabricating Cu-Fe-S Nanobulk Thermoelectric Materials by Blending Cu2S and FeS Nanoparticles as Building Blocks
AU - Singh, Maninder
AU - Dwivedi, Pratibha
AU - Mott, Derrick
AU - Higashimine, Koichi
AU - Ohta, Michihiro
AU - Miwa, Hiroshi
AU - Akatsuka, Takeo
AU - Maenosono, Shinya
N1 - Funding Information:
This work was supported by NEDO Research and Development for Innovative Use of Unused Thermal Energy. This work at Japan Advanced Institute of Science and Technology (JAIST) was partially supported by the Mazda Foundation, Shibuya Science Culture and Sports Foundation, and TEPCO Memorial Foundation. This work at the National Institute of Advanced Industrial Science and Technology (AIST) was supported as part of the International Joint Research Program for Innovative Energy Technology funded by the Ministry of Economy, Trade and Industry, Japan. The authors thank Ms. Naoko Fujimoto of the AIST for operating the ZEM-3 and LFA457 instruments and Mr. Atsushi Yamamoto of the AIST for supporting these measurements. The authors thank Dr. Masanobu Miyata of JAIST for his support in Hall measurements. The authors also thank Dr. Priyank Mohan for valuable discussion. We thank Edanz Group (www.edanzediting.com/ ac) for editing a draft of this manuscript.
Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/3/6
Y1 - 2019/3/6
N2 - The Cu-Fe-S system consists of earth-abundant low-toxicity elements, and it potentially has good thermoelectric properties. There are many different types of Cu-Fe-S compounds, and some are n-type semiconductors while others are p-type semiconductors. Here, we report a rapid low-cost colloid-chemical method to fabricate Cu-Fe-S thermoelectric materials using Cu2S and FeS nanoparticles as building blocks. The n- and p-type of the Cu-Fe-S nanobulk material can be readily tuned by changing the Cu2S/FeS volume ratio. The nanobulk materials lead to low lattice thermal conductivity ranging from 0.3 to 1.0 W m-1 K-1. By blending Cu2S and FeS nanoparticles at a weight fraction of 9:1, we fabricated a nanocomposite consisting of bornite Cu5FeS4 as the main phase and other minor phases. This nanocomposite has a maximum dimensionless figure of merit (ZT) of 0.55 at 663 K, which is 45% higher than that of pristine Cu5FeS4.
AB - The Cu-Fe-S system consists of earth-abundant low-toxicity elements, and it potentially has good thermoelectric properties. There are many different types of Cu-Fe-S compounds, and some are n-type semiconductors while others are p-type semiconductors. Here, we report a rapid low-cost colloid-chemical method to fabricate Cu-Fe-S thermoelectric materials using Cu2S and FeS nanoparticles as building blocks. The n- and p-type of the Cu-Fe-S nanobulk material can be readily tuned by changing the Cu2S/FeS volume ratio. The nanobulk materials lead to low lattice thermal conductivity ranging from 0.3 to 1.0 W m-1 K-1. By blending Cu2S and FeS nanoparticles at a weight fraction of 9:1, we fabricated a nanocomposite consisting of bornite Cu5FeS4 as the main phase and other minor phases. This nanocomposite has a maximum dimensionless figure of merit (ZT) of 0.55 at 663 K, which is 45% higher than that of pristine Cu5FeS4.
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U2 - 10.1021/acs.iecr.8b05569
DO - 10.1021/acs.iecr.8b05569
M3 - Article
AN - SCOPUS:85062605584
VL - 58
SP - 3688
EP - 3697
JO - Industrial & Engineering Chemistry Research
JF - Industrial & Engineering Chemistry Research
SN - 0888-5885
IS - 9
ER -