Journal
MATERIALS
Volume 8, Issue 3, Pages 1124-1149Publisher
MDPI
DOI: 10.3390/ma8031124
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Funding
- Japan-U.S. Cooperation Project for Research and Standardization of Clean Energy Technologies - Ministry of Economy, Trade and Industry (METI)
- JSPS KAKENHI Grant [25420699]
- Grants-in-Aid for Scientific Research [25420699] Funding Source: KAKEN
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Sulfides are promising candidates for environment-friendly and cost-effective thermoelectric materials. In this article, we review the recent progress in all-length-scale hierarchical architecturing for sulfides and chalcogenides, highlighting the key strategies used to enhance their thermoelectric performance. We primarily focus on TiS2-based layered sulfides, misfit layered sulfides, homologous chalcogenides, accordion-like layered Sn chalcogenides, and thermoelectric minerals. CS2 sulfurization is an appropriate method for preparing sulfide thermoelectric materials. At the atomic scale, the intercalation of guest atoms/layers into host crystal layers, crystal-structural evolution enabled by the homologous series, and low-energy atomic vibration effectively scatter phonons, resulting in a reduced lattice thermal conductivity. At the nanoscale, stacking faults further reduce the lattice thermal conductivity. At the microscale, the highly oriented microtexture allows high carrier mobility in the in-plane direction, leading to a high thermoelectric power factor.
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