Ding, Jinxue ; Li, Wei ; Thiem, Moritz ; Skokov, Konstantin P. ; Xie, Wenjie ; Weidenkaff, Anke (2024)
Entropy engineering in transition metal sulfides for thermoelectric application.
In: Open Ceramics, 17
doi: 10.1016/j.oceram.2023.100535
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Transition metal sulfides have emerged as highly promising materials in thermoelectrics owing to their economic viability and sustainable characteristics. Herein, we developed entropy-engineered sulfides based on TiS2. The process of equal doping at Ti sites resulted in a notable reduction in lattice thermal conductivity due to point defects and phase segregation induced by entropy engineering; however, it also had a substantial detrimental effect on the Seebeck coefficient. Finally, by incorporating minor doping at Ti sites with Zr, Nb and Ta, each at a concentration of 1 at%, an impressive figure of merit of 0.38 was achieved at 625 K because minor doping was able to maintain the large Seebeck coefficient while simultaneously reducing the lattice thermal conductivity. This study not only illuminates the significant role of entropy engineering in reducing lattice thermal conductivity but also sparks interest in the potential of equivalent doping at sulfur sites for future investigations.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Ding, Jinxue ; Li, Wei ; Thiem, Moritz ; Skokov, Konstantin P. ; Xie, Wenjie ; Weidenkaff, Anke |
| Art des Eintrags: | Bibliographie |
| Titel: | Entropy engineering in transition metal sulfides for thermoelectric application |
| Sprache: | Englisch |
| Publikationsjahr: | 2024 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Open Ceramics |
| Jahrgang/Volume einer Zeitschrift: | 17 |
| DOI: | 10.1016/j.oceram.2023.100535 |
| Kurzbeschreibung (Abstract): | Transition metal sulfides have emerged as highly promising materials in thermoelectrics owing to their economic viability and sustainable characteristics. Herein, we developed entropy-engineered sulfides based on TiS2. The process of equal doping at Ti sites resulted in a notable reduction in lattice thermal conductivity due to point defects and phase segregation induced by entropy engineering; however, it also had a substantial detrimental effect on the Seebeck coefficient. Finally, by incorporating minor doping at Ti sites with Zr, Nb and Ta, each at a concentration of 1 at%, an impressive figure of merit of 0.38 was achieved at 625 K because minor doping was able to maintain the large Seebeck coefficient while simultaneously reducing the lattice thermal conductivity. This study not only illuminates the significant role of entropy engineering in reducing lattice thermal conductivity but also sparks interest in the potential of equivalent doping at sulfur sites for future investigations. |
| Freie Schlagworte: | thermoelectric, transition metal sulfides, entropy engineering |
| Zusätzliche Informationen: | Artikel-ID: 100535 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Werkstofftechnik und Ressourcenmanagement |
| Hinterlegungsdatum: | 09 Jan 2024 06:55 |
| Letzte Änderung: | 09 Jan 2024 07:03 |
| PPN: | 51452717X |
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