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Bourgès, C., Zhang, W., Raut, K. K., Owada, Y., Kawamoto, N., Mitome, M., Kobayashi, K., Halet, J.-F., Berthebaud, D. & Mori, T. (2023) Investigation of Mn Single and Co-Doping in Thermoelectric CoSb3-Skutterudite: A Way Toward a Beneficial Composite Effect. ACS Appl. Energy Mater. 6 9646–9656.
Added by: Richard Baschera (2023-11-22 08:50:17) Last edited by: Richard Baschera (2023-11-22 09:00:25) |
| Type de référence: Article DOI: 10.1021/acsaem.3c01725 Clé BibTeX: Bourgs2023 Voir tous les détails bibliographiques  |
Catégories: INTERNATIONAL, MIOPS Créateurs: Berthebaud, Bourgès, Halet, Kawamoto, Kobayashi, Mitome, Mori, Owada, Raut, Zhang Collection: ACS Appl. Energy Mater. |
Consultations : 1/45
Indice de consultation : 6% Indice de popularité : 1.5% |
| Liens URLs https://doi.org/10.1021/acsaem.3c01725 |
| Résumé |
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We report here the first in-depth theoretical and experimental investigations of Mn substitution within the CoSb3-skutterudite. A systematic and comprehensive approach was employed to first determine the feasibility of single/cosubstitution for Mn with Te and then assess its effect. Subsequently, experimental realization of the samples was conducted. We were able to highlight a low solubility limit of Mn as a single dopant and provide evidence that the substitution stabilizes p-type conduction, as predicted via density functional theory calculations. Then, we reveal the prevalent formation of the composite MnTe/CoSb3-skutterudite phases instead of the expected favorable cosubstitution. This unexpected composite formation induces a beneficial effect, maximizing the Seebeck coefficient and leading to a record power factor (PF) of ≈ 4.7 mW/m K2 at 725 K for an unfilled skutterudite compound (PF = S2σ with S, Seebeck coefficient; σ, electrical conductivity).
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Publisher: American Chemical Society
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