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Thermoelectric Properties of Minerals with the Mawsonite Structure

Publication ,  Journal Article
Siloi, I; Gopal, P; Curtarolo, S; Nardelli, MB; Vaqueiro, P; Fornari, M
Published in: ACS Applied Energy Materials
November 25, 2019

Synthetic copper sulfides have emerged as promising nontoxic and low-cost materials for thermoelectric power generation in low-grade waste heat recovery systems. Similarly to tetrahedrite and colusite, mawsonite Cu6Fe2SnS8 exhibits a modified corner sharing Cu-S tetrahedral network which usually leads to p-type character and low thermal conductivity. In order to explore the applicative potential of mawsonite, we studied the band structure, the phonon dispersions, the electronic and transport coefficients, as well as the effect of isovalent substitutions of Fe, Sn, and S. The combined analysis of electronic and vibrational properties highlights the role of the weakly bonded copper component in achieving a very low thermal conductivity. We also demonstrate that the Cu-S bond builds a 2D conductive network where the contribution from other elements is negligible. Magnetic calculations point to an antiferromagnetic ground state substantially affected by the covalency of the bonds with the conductive plane. The chemical substitution of Fe with Ni leads to nonmagnetic metals whereas Cu6Fe2SnSe8, Cu6Fe2PbS8, and Cu6Fe2GeX8 with X = S, Se, and Te are semiconductors.

Duke Scholars

Published In

ACS Applied Energy Materials

DOI

EISSN

2574-0962

Publication Date

November 25, 2019

Volume

2

Issue

11

Start / End Page

8068 / 8078

Related Subject Headings

  • 40 Engineering
  • 34 Chemical sciences
 

Citation

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Siloi, I., Gopal, P., Curtarolo, S., Nardelli, M. B., Vaqueiro, P., & Fornari, M. (2019). Thermoelectric Properties of Minerals with the Mawsonite Structure. ACS Applied Energy Materials, 2(11), 8068–8078. https://doi.org/10.1021/acsaem.9b01564
Siloi, I., P. Gopal, S. Curtarolo, M. B. Nardelli, P. Vaqueiro, and M. Fornari. “Thermoelectric Properties of Minerals with the Mawsonite Structure.” ACS Applied Energy Materials 2, no. 11 (November 25, 2019): 8068–78. https://doi.org/10.1021/acsaem.9b01564.
Siloi I, Gopal P, Curtarolo S, Nardelli MB, Vaqueiro P, Fornari M. Thermoelectric Properties of Minerals with the Mawsonite Structure. ACS Applied Energy Materials. 2019 Nov 25;2(11):8068–78.
Siloi, I., et al. “Thermoelectric Properties of Minerals with the Mawsonite Structure.” ACS Applied Energy Materials, vol. 2, no. 11, Nov. 2019, pp. 8068–78. Scopus, doi:10.1021/acsaem.9b01564.
Siloi I, Gopal P, Curtarolo S, Nardelli MB, Vaqueiro P, Fornari M. Thermoelectric Properties of Minerals with the Mawsonite Structure. ACS Applied Energy Materials. 2019 Nov 25;2(11):8068–8078.

Published In

ACS Applied Energy Materials

DOI

EISSN

2574-0962

Publication Date

November 25, 2019

Volume

2

Issue

11

Start / End Page

8068 / 8078

Related Subject Headings

  • 40 Engineering
  • 34 Chemical sciences