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
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.
UR - http://www.scopus.com/inward/record.url?scp=85062605584&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85062605584&partnerID=8YFLogxK
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 -