High thermoelectric performance and low thermal conductivity in Cu2−yS1/3Se1/3Te1/3liquid-like materials with nanoscale mosaic structures

doi:10.1016/j.nanoen.2017.10.042

	High thermoelectric performance and low thermal conductivity in Cu2−yS1/3Se1/3Te1/3liquid-like materials with nanoscale mosaic structures
	Zhao, Kunpeng 1,2; Zhu, Chenxi 1,2; Qiu, Pengfei 1; Blichfeld, Anders B.3,4; Eikeland, Espen 3,5; Ren, Dudi 1; Iversen, Bo B.3; Xu, Fangfang 1; Shi, Xun 1; Chen, Lidong 1
刊名	Nano Energy
	2017
卷号	42 页码:43-50
ISSN号	22112855
DOI	10.1016/j.nanoen.2017.10.042
英文摘要	Mosaic-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
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/25801]
专题	中国科学院上海硅酸盐研究所
作者单位	1.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
推荐引用方式 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.