气候变化领域集成服务门户(CCPortal): Realizing record high performance in n-type Bi2Te3-based thermoelectric materials

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DOI	10.1039/d0ee01349h
	Realizing record high performance in n-type Bi2Te3-based thermoelectric materials
	Zhu B.; Liu X.; Wang Q.; Qiu Y.; Shu Z.; Guo Z.; Tong Y.; Cui J.; Gu M.; He J.
发表日期	2020
ISSN	17545692
起始页码	2106
结束页码	2114
卷号	13 期号:7
英文摘要	The application of Bi2Te3-based power generation is seriously hindered by the poor n-type samples, demonstrating a strong demand for high-performance n-type Bi2Te3-based thermoelectric (TE) materials. However, the strong relationship between thermal and electrical transport limits the improvement of the TE properties. Here, we propose a strategy to enhance the Seebeck coefficient while retaining a large electrical conductivity in n-type (Bi,Sb)2(Te,Se)3 materials through introducing electron transport potential wells and texturing. The thermal conductivity was also successfully decreased by constructing multi-scale phonon scattering structures. Consequently, a record maximum and average thermoelectric figure of merit (ZT) of ∼1.4 and ∼1.3 were achieved in the Bi1.8Sb0.2Te2.7Se0.3 + 15 wt% Te sample at a temperature of 300-575 K. A TE power generation module was fabricated with this n-type material and a home-made p-type Bi2Te3 sample. It demonstrated a record conversion efficiency of 6.6% at a temperature gradient of 235 K, representing about an 88% improvement compared with a commercial zone-melt Bi2Te3-based module. © 2020 The Royal Society of Chemistry.
英文关键词	Antimony compounds; Electron transport properties; Selenium compounds; Thermal conductivity; Thermoelectric energy conversion; Thermoelectric equipment; Thermoelectricity; Electrical conductivity; Electron transport; Scattering structures; TE power generations; Thermal and electrical transport; Thermo-Electric materials; Thermoelectric figure of merit; Thermoelectric material; Bismuth compounds; demand analysis; electrical conductivity; electrochemistry; energy efficiency; performance assessment; power generation
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189613
作者单位	Shenzhen Key Laboratory of Thermoelectric Materials, Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China; School of Physics and Technology, Wuhan University, Wuhan, 430072, China; Department of Materials Science and Engineering, Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, China; Key Laboratory of Energy Conversion and Storage Technologies, Southern University of Science and Technology, Ministry of Education, Shenzhen, 518055, China
推荐引用方式 GB/T 7714	Zhu B.,Liu X.,Wang Q.,et al. Realizing record high performance in n-type Bi2Te3-based thermoelectric materials[J],2020,13(7).
APA	Zhu B..,Liu X..,Wang Q..,Qiu Y..,Shu Z..,...&He J..(2020).Realizing record high performance in n-type Bi2Te3-based thermoelectric materials.Energy & Environmental Science,13(7).
MLA	Zhu B.,et al."Realizing record high performance in n-type Bi2Te3-based thermoelectric materials".Energy & Environmental Science 13.7(2020).