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High thermoelectric performance and low thermal conductivity in Cu2−yS1/3Se1/3Te1/3liquid-like materials with nanoscale mosaic structures
Zhao, Kunpeng1,2; Zhu, Chenxi1,2; Qiu, Pengfei1; Blichfeld, Anders B.3,4; Eikeland, Espen3,5; Ren, Dudi1; Iversen, Bo B.3; Xu, Fangfang1; Shi, Xun1; Chen, Lidong1
2017
Source PublicationNano Energy
ISSN22112855
Volume42Pages:43-50
AbstractMosaic-crystal microstructure is one of the optimal strategies for decoupling and balancing thermal and electrical transport properties in thermoelectric materials. Herein, we successfully achieve the desired nanoscale mosaic structures in triple-component Cu2−yS1/3Se1/3Te1/3solid solutions using Cu2S, Cu2Se, and Cu2Te matrix compounds. They are solved in hexagonal structures with space group R3m by means of single crystal structural solution and Rietveld refinement. Electron backscatter diffraction measurements show that all the samples are polycrystalline compounds with the grain size in the range of micrometers. However, transmission electron microscopic study reveals that these microscale grains are quasi-single crystals consist of a variety of 10–30 nm mosaic grains. Each mosaic grain is a perfect crystal but titled or rotated with respect to others by a very small angle. In this case, excellent electrical transports are maintained but exceptional low thermal conductivity is achieved throughout the whole temperature range, which is attributed to the combined phonon scatterings by point defects, liquid-like copper ions, and lattice strains or interfaces of mosaic nanograins. Combining all these favorable factors, remarkably high thermoelectric performance is achieved in Cu1.98S1/3Se1/3Te1/3with a maximum zT of 1.9 at 1000 K. © 2017 Elsevier Ltd
DOI10.1016/j.nanoen.2017.10.042
EI Accession Number20174304311298
EI KeywordsSulfur compounds
EI Classification Number531.1 Metallurgy - 641.1 Thermodynamics - 701.1 Electricity: Basic Concepts and Phenomena - 761 Nanotechnology - 801 Chemistry - 933 Solid State Physics
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25801
Collection中国科学院上海硅酸盐研究所
Affiliation1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
2.University of Chinese Academy of Sciences, Beijing; 100049, China;
3.Centre for Materials Crystallography, Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, Aarhus C; DK-8000, Denmark;
4.Department of Materials Science and Engineering, Norwegian University of Science and Technology, Trondheim; N-7491, Norway;
5.Danish Technological Institute, Centre for Nano Production and Micro Analysis, Taastrup; DK-2630, Denmark
Recommended Citation
GB/T 7714
Zhao, Kunpeng,Zhu, Chenxi,Qiu, Pengfei,et al. High thermoelectric performance and low thermal conductivity in Cu2−yS1/3Se1/3Te1/3liquid-like materials with nanoscale mosaic structures[J]. Nano Energy,2017,42:43-50.
APA Zhao, Kunpeng.,Zhu, Chenxi.,Qiu, Pengfei.,Blichfeld, Anders B..,Eikeland, Espen.,...&Chen, Lidong.(2017).High thermoelectric performance and low thermal conductivity in Cu2−yS1/3Se1/3Te1/3liquid-like materials with nanoscale mosaic structures.Nano Energy,42,43-50.
MLA Zhao, Kunpeng,et al."High thermoelectric performance and low thermal conductivity in Cu2−yS1/3Se1/3Te1/3liquid-like materials with nanoscale mosaic structures".Nano Energy 42(2017):43-50.
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