Ultrafast Synthesis of Te-Doped CoSb3 with Excellent Thermoelectric Properties

doi:10.1021/acsaem.9b00720

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	Ultrafast Synthesis of Te-Doped CoSb3 with Excellent Thermoelectric Properties
	Lei, Ying 2,4,5; Gao, Wensheng 2; Zheng, Rui 2; Li, Yu 2; Chen, Wen 6; Zhang, Libo 1; Wan, Rundong 7; Zhou, Hongwei 5; Liu, Zhiyuan 3; Chu, Paul K.4
刊名	ACS Applied Energy Materials
	2019-06-24
卷号	2 期号:6 页码:4477-4485
关键词	Antimony compounds Crystal lattices Electric power factor Metal castings Microwave materials processing Screw dislocations Skutterudites Spark plasma sintering Thermal conductivity Thermoelectricity Boundary scattering Lattice dislocations Lattice thermal conductivity Microwave synthesis Power factors
DOI	10.1021/acsaem.9b00720
英文摘要	An efficient technique to prepare high-ZT skutterudites is described. Nearly single-phase Te-doped CoSb3-xTex ingots are synthesized by microwave processing for 5 min, and materials with 98% relative density are produced after spark plasma sintering for 5 min. The phase composition, grain size, and microstructure are studied, and the electrical and thermal transport mechanisms are examined systematically. In addition, the phonon scattering mechanism is examined. Our results show that 5-10 mol % Te is desirable for CoSb3-xTex, and the power factors can be maximized by balancing the Seebeck coefficient and conductivity. Abundant edge and screw dislocations are observed, and an ultralow lattice thermal conductivity of 1.04 W m-1 K-1 is observed from CoSb2.95Te0.05 at 773 K on account of the combined effects of boundary and dislocation scattering. CoSb2.95Te0.5 shows the highest ZT of 1.06 at 773 K, and even larger values can be achieved at a higher temperature. The preparation technique described here has many advantages associated with the properties and efficiency and great potential in the research and production of TE materials. © Copyright 2019 American Chemical Society.
语种	英语
出版者	American Chemical Society
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114925]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院
作者单位	1.Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, 68 Wenchang Road, 121 Street, Kunming; 650093, China; 2.School of Metallurgical Engineering, Anhui University of Technology, Maxiang Road, Ma'anshan; 243032, China; 3.School of Materials Science and Engineering, Anhui University of Technology, Maxiang Road, Ma'anshan; 243032, China; 4.Department of Physics, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong; 5.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, 287 Langongping Road, Lanzhou; 730050, China; 6.Institute of Mineral Resources Development and Utilization, Changsha Research Institute of Mining and Metallurgy Co., Ltd., 966 South Lushan Road, Changsha; 410012, China; 7.College of Materials Science and Engineering, Kunming University of Science and Technology, 727 South Jingming Road, Kunming, Chenggong New District; 650093, China
推荐引用方式 GB/T 7714	Lei, Ying,Gao, Wensheng,Zheng, Rui,et al. Ultrafast Synthesis of Te-Doped CoSb3 with Excellent Thermoelectric Properties[J]. ACS Applied Energy Materials,2019,2(6):4477-4485.
APA	Lei, Ying.,Gao, Wensheng.,Zheng, Rui.,Li, Yu.,Chen, Wen.,...&Chu, Paul K..(2019).Ultrafast Synthesis of Te-Doped CoSb3 with Excellent Thermoelectric Properties.ACS Applied Energy Materials,2(6),4477-4485.
MLA	Lei, Ying,et al."Ultrafast Synthesis of Te-Doped CoSb3 with Excellent Thermoelectric Properties".ACS Applied Energy Materials 2.6(2019):4477-4485.