English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Unveiling the origins of low lattice thermal conductivity in 122-phase Zintl compounds

Guo, K., Weng, T., Jiang, Y., Zhu, Y., Li, H., Yuan, S., et al. (2021). Unveiling the origins of low lattice thermal conductivity in 122-phase Zintl compounds. Materials Today Physics, 21: 100480, pp. 1-10. doi:10.1016/j.mtphys.2021.100480.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Guo, K.1, Author
Weng, T.1, Author
Jiang, Y.1, Author
Zhu, Y.1, Author
Li, H.1, Author
Yuan, S.1, Author
Yang, J.1, Author
Zhang, J.1, Author
Luo, J.1, Author
Grin, Y.2, Author              
Zhao, J.-T.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863413              

Content

show
hide
Free keywords: Chemical bonding, Chemical composition, Crystal structure, Lattice thermal conductivity, Zintl phase, Atoms, Chemical bonds, Crystal lattices, Nanotechnology, Thermoelectric equipment, Thermoelectricity, Acoustic branches, Chemical bondings, Complex structure, Lattice thermal conductivity, Simple structures, Thermo-Electric materials, Thermoelectric properties, Working temperatures, Thermal conductivity
 Abstract: The intrinsically low lattice thermal conductivity κL is essentially important for thermoelectric technology to maintain large working temperature difference, in order to enlarge the output power. In principle, high density and complex structure at atomic and nano scale are typical features for thermoelectric materials with low lattice thermal conductivities (κLs). However, many 122-phase Zintl compounds with promising thermoelectric properties defy these paradigms. They adopt three relatively simple structures with comparably small mean atomic mass, while these compounds exhibit considerably low lattice thermal conductivities κLs. Herein we unveil the origins of low κLs in 122-phase Zintl compounds, ascribed from the important aspects including atomic constituents, their arrangements and chemical bonding. The coupling between the acoustic branches and low-frequency optical branches, as well as the anisotropic chemical bonding are responsible for the high anharmonicity, favoring for the low phonon velocity and small relaxation time. This work offers a guidance to design high-performance Zintl thermoelectric materials with ultralow lattice thermal conductivity. © 2021

Details

show
hide
Language(s): eng - English
 Dates: 2021-07-142021-07-14
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.mtphys.2021.100480
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Materials Today Physics
  Abbreviation : Mater. Today Phys.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Amsterdam, The Netherlands : Elsevier
Pages: - Volume / Issue: 21 Sequence Number: 100480 Start / End Page: 1 - 10 Identifier: ISSN: 2542-5293
CoNE: https://pure.mpg.de/cone/journals/resource/2542-5293