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Author Spotlight: Advancing Energy Solutions Using Nanocomposites as Processed Thermoelectric Materials
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Improving thermoelectric performance by constructing a SnTe/ZnO core-shell structure
Song Li1, Jingwen Zhang1,2, Dawei Liu1
1School of Materials Science and Engineering, Hefei University of Technology Hefei 230009 China zjwhfut18205614071@163.com zjiuxing@hfut.edu.cn.
RSC Advances
|September 12, 2022
Summary
Tin telluride (SnTe) shows promise as an eco-friendly thermoelectric material. This study enhances SnTe
Area of Science:
- Materials Science
- Solid State Physics
- Nanotechnology
Background:
- Tin telluride (SnTe) is an emerging intermediate-temperature thermoelectric material.
- Its environmental friendliness makes it attractive for energy conversion applications.
Purpose of the Study:
- To enhance the thermoelectric performance of SnTe by creating a SnTe/ZnO core-shell structure.
- To investigate the effects of ZnO nanostructures and Cu2Te alloying on thermoelectric properties.
Main Methods:
- Facile hydrothermal synthesis to create SnTe/ZnO core-shell structures.
- Spark plasma sintering to convert ZnO nanosheets into nano-dots.
- Cu2Te alloying to introduce point defects.
Main Results:
- Successful fabrication of SnTe/ZnO core-shell structures with ZnO nano-dots after sintering.
- Improved Seebeck coefficient due to energy barriers at the SnTe/ZnO interfaces.
- Reduced lattice thermal conductivity through phonon scattering by ZnO interfaces and point defects.
- Achieved a peak figure of merit (ZT) of 0.94 at 823 K for SnTe(Cu2Te)0.06-1.5% ZnO.
Conclusions:
- The SnTe/ZnO core-shell structure effectively optimizes thermoelectric performance.
- Synergistic enhancement of electrical and thermal transport properties leads to high ZT values.
- This approach offers a new strategy for developing efficient thermoelectric materials.
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