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DOI	10.1039/d0ee03014g
	Unveiling the phonon scattering mechanisms in half-Heusler thermoelectric compounds
	He R.; Zhu T.; Wang Y.; Wolff U.; Jaud J.-C.; Sotnikov A.; Potapov P.; Wolf D.; Ying P.; Wood M.; Liu Z.; Feng L.; Rodriguez N.P.; Snyder G.J.; Grossman J.C.; Nielsch K.; Schierning G.
发表日期	2020
ISSN	17545692
起始页码	5165
结束页码	5176
卷号	13 期号:12
英文摘要	Half-Heusler (HH) compounds are among the most promising thermoelectric (TE) materials for large-scale applications due to their superior properties such as high power factor, excellent mechanical and thermal reliability, and non-toxicity. Their only drawback is the remaining-high lattice thermal conductivity. Various mechanisms were reported with claimed effectiveness to enhance the phonon scattering of HH compounds including grain-boundary scattering, phase separation, and electron-phonon interaction. In this work, however, we show that point-defect scattering has been the dominant mechanism for phonon scattering other than the intrinsic phonon-phonon interaction for ZrCoSb and possibly many other HH compounds. Induced by the charge-compensation effect, the formation of Co/4d Frenkel point defects is responsible for the drastic reduction of lattice thermal conductivity in ZrCoSb1-xSnx. Our work systematically depicts the phonon scattering profile of HH compounds and illuminates subsequent material optimizations. This journal is © The Royal Society of Chemistry.
英文关键词	Antimony compounds; Crystal lattices; Electron-phonon interactions; Grain boundaries; Phase separation; Phonon scattering; Point defects; Thermal conductivity; Grain boundary scattering; Large-scale applications; Lattice thermal conductivity; Material optimization; Phonon-phonon interactions; Phonon-scattering mechanisms; Thermoelectric compound; Thermoelectric material; Zirconium compounds; electricity generation; energy efficiency; energy planning; energy storage; mechanical property; molecular analysis; thermochemistry
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/189433
作者单位	Leibniz Institute for Solid State and Materials Research, Dresden, 01069, Germany; Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China; Department of Materials and Earth Sciences, Technical University of Darmstadt, Darmstadt, 64287, Germany; Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, United States; Institute of Materials Science, Technical University of Dresden, Dresden, 01062, Germany; Institute of Applied Physics, Technical University of Dresden, Dresden, 01062, Germany
推荐引用方式 GB/T 7714	He R.,Zhu T.,Wang Y.,et al. Unveiling the phonon scattering mechanisms in half-Heusler thermoelectric compounds[J],2020,13(12).
APA	He R..,Zhu T..,Wang Y..,Wolff U..,Jaud J.-C..,...&Schierning G..(2020).Unveiling the phonon scattering mechanisms in half-Heusler thermoelectric compounds.Energy & Environmental Science,13(12).
MLA	He R.,et al."Unveiling the phonon scattering mechanisms in half-Heusler thermoelectric compounds".Energy & Environmental Science 13.12(2020).