气候变化领域集成服务门户(CCPortal): Realizing high-efficiency power generation in low-cost PbS-based thermoelectric materials

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DOI	10.1039/c9ee03410b
	Realizing high-efficiency power generation in low-cost PbS-based thermoelectric materials
	Jiang B.; Liu X.; Wang Q.; Cui J.; Jia B.; Zhu Y.; Feng J.; Qiu Y.; Gu M.; Ge Z.; He J.
发表日期	2020
ISSN	17545692
起始页码	579
结束页码	591
卷号	13 期号:2
英文摘要	The application of thermoelectric technology is hindered by low efficiencies and high costs, demonstrating a strong demand for high-performance thermoelectric materials composed of low-cost and earth-abundant elements. PbS-based materials have attracted much attention for thermoelectric power generation due to their low-cost and earth-abundant features. However, the high lattice thermal conductivities and low electron mobilities of these materials limit their thermoelectric performance. Here, we show that we can largely reduce the lattice thermal conductivity of an n-type PbS-based material to 0.4 W m-1 K-1 through introducing zigzag nanoprecipitates with a uniform width of around 1 nm. The electron mobility was also successfully improved by reducing the effective mass through Se alloying. Finally, an extraordinary figure of merit of 1.7 at 900 K was realized in an n-type Pb0.93Sb0.05S0.5Se0.5 sample. A thermoelectric power generation module was fabricated with this n-type PbS material and our home-made high-performance p-type PbTe. It demonstrated a high conversion efficiency of 8.0% at a temperature difference of 565 K. Furthermore, a segmented module consisting of n-/p-Bi2Te3 and n-PbS/p-PbTe was fabricated, which exhibited a high conversion efficiency of 11.2% at a temperature difference of 585 K. This efficiency is the same as those of reported PbTe-based modules, and it was realized at a much lower cost. As a result, low-cost high-performance n-type PbS-based materials as a promising PbTe alternative will promote the extensive commercial application of thermoelectric power generation. © 2020 The Royal Society of Chemistry.
英文关键词	Antimony compounds; Conversion efficiency; Costs; Crystal lattices; Efficiency; Electron mobility; IV-VI semiconductors; Lead compounds; Precipitation (chemical); Tellurium compounds; Thermal conductivity; Thermoelectric equipment; Thermoelectric power; Thermoelectricity; Commercial applications; High conversion efficiency; High efficiency power generation; Lattice thermal conductivity; Nanoprecipitates; Temperature differences; Thermo-Electric materials; Thermoelectric performance; Sulfur compounds; alloy; electricity generation; electron; element mobility; energy efficiency; lead; power generation; thermal conductivity; thermal power
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/189696
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; Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China
推荐引用方式 GB/T 7714	Jiang B.,Liu X.,Wang Q.,et al. Realizing high-efficiency power generation in low-cost PbS-based thermoelectric materials[J],2020,13(2).
APA	Jiang B..,Liu X..,Wang Q..,Cui J..,Jia B..,...&He J..(2020).Realizing high-efficiency power generation in low-cost PbS-based thermoelectric materials.Energy & Environmental Science,13(2).
MLA	Jiang B.,et al."Realizing high-efficiency power generation in low-cost PbS-based thermoelectric materials".Energy & Environmental Science 13.2(2020).