Anharmonic phonon frequency and ultralow lattice thermal conductivity in β-Cu2Se liquid-like thermoelectrics

2020 ◽  
Vol 22 (48) ◽  
pp. 28086-28092
Author(s):  
Wenjie Zhang ◽  
Chong Zheng ◽  
Yanbing Dong ◽  
Jia-Yue Yang ◽  
Linhua Liu
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Material ◽  
Lattice Thermal Conductivity ◽  
Phonon Frequency ◽  
Electron Crystal

The prototype phonon-liquid electron-crystal β-Cu2Se has been ranked among the best thermoelectric material with its ultralow lattice thermal conductivity (κL).

scholarly journals Zintl-phase Eu2ZnSb2: A promising thermoelectric material with ultralow thermal conductivity

2019 ◽  
Vol 116 (8) ◽  
pp. 2831-2836 ◽  
Author(s):  
Chen Chen ◽  
Wenhua Xue ◽  
Shan Li ◽  
Zongwei Zhang ◽  
Xiaofang Li ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Material ◽  
Thermoelectric Materials ◽  
Lattice Thermal Conductivity ◽  
Domain Boundary ◽  
Zn Deficiency ◽  
Zintl Phase ◽  
Medium Temperature ◽  
Inversion Domain ◽  
Electron Crystal

Zintl compounds are considered to be potential thermoelectric materials due to their “phonon glass electron crystal” (PGEC) structure. A promising Zintl-phase thermoelectric material, 2-1-2–type Eu2ZnSb2 (P63/mmc), was prepared and investigated. The extremely low lattice thermal conductivity is attributed to the external Eu atomic layers inserted in the [Zn2Sb2]2- network in the structure of 1-2-2–type EuZn2Sb2(P3¯m1), as well as the abundant inversion domain boundary. By regulating the Zn deficiency, the electrical properties are significantly enhanced, and the maximum ZT value reaches ∼1.0 at 823 K for Eu2Zn0.98Sb2. Our discovery provides a class of Zintl thermoelectric materials applicable in the medium-temperature range.

ChemInform Abstract: Probing the Lower Limit of Lattice Thermal Conductivity in an Ordered Extended Solid: Gd117Co56Sn112, a Phonon Glass-Electron Crystal System.

ChemInform ◽  
2012 ◽  
Vol 43 (32) ◽  
pp. no-no
Author(s):  
Devin C. Schmitt ◽  
Neel Haldolaarachchige ◽  
Yimin Xiong ◽  
David P. Young ◽  
Rongying Jin ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Lower Limit ◽  
Lattice Thermal Conductivity ◽  
Crystal System ◽  
Electron Crystal

Metal phosphide CuP2 as a promising thermoelectric material: an insight from first-principles study

2021 ◽  
Author(s):  
Un-Gi Jong ◽  
Chol-Hyok Ri ◽  
Chol-Jin Pak ◽  
Chol-Hyok Kim ◽  
Stefaan Cottenier ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Material ◽  
Thermoelectric Materials ◽  
First Principles ◽  
Lattice Thermal Conductivity ◽  
Metal Phosphide ◽  
First Principles Study ◽  
Metal Phosphides ◽  
Large Lattice

In the search for better thermoelectric materials, metal phosphides have not been considered to be viable candidates so far, due to their large lattice thermal conductivity. Here we study thermoelectric...

Aguilarite Ag4SSe Thermoelectric Material: Natural Mineral with Low Lattice Thermal Conductivity

2019 ◽  
Vol 11 (13) ◽  
pp. 12632-12638 ◽  
Author(s):  
Tuo Wang ◽  
Kunpeng Zhao ◽  
Pengfei Qiu ◽  
Qingfeng Song ◽  
Lidong Chen ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Material ◽  
Lattice Thermal Conductivity ◽  
Natural Mineral

scholarly journals SnTe–AgBiTe2 as an efficient thermoelectric material with low thermal conductivity

2014 ◽  
Vol 2 (48) ◽  
pp. 20849-20854 ◽  
Author(s):  
Gangjian Tan ◽  
Fengyuan Shi ◽  
Hui Sun ◽  
Li-Dong Zhao ◽  
Ctirad Uher ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Solid Solution ◽  
Seebeck Coefficient ◽  
Thermoelectric Material ◽  
Lattice Thermal Conductivity ◽  
Alloying Effect ◽  
Low Thermal Conductivity ◽  
Interface Scattering

SnTe–AgBiTe2 is not only a solid solution but a nanocomposite. The alloying effect coupled with intense interface scattering leads to considerably decreased lattice thermal conductivity. Bi is much more powerful in neutralizing holes than Sb, giving rise to a much higher Seebeck coefficient. A high ZT was then obtained.

Overview of Various Strategies and Promising New Bulk Materials for Potential Thermoelectric Applications

2001 ◽  
Vol 691 ◽  
Author(s):  
Terry M. Tritt
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Material ◽  
Lattice Thermal Conductivity ◽  
Heusler Alloys ◽  
Material Research ◽  
Research Groups ◽  
Ceramic Oxides ◽  
Large Power ◽  
Minimum Requirements ◽  
Low Dimensional

ABSTRACTRecently, there has been a renewed interest in thermoelectric material research. There are a number of different systems of potential thermoelectric (TE) materials that are under investigation by various research groups. Some of these research efforts focus on minimizing lattice thermal conductivity while other efforts focus on materials that exhibit large power factors. An overview of some of the requirements and strategies for the investigation and optimization of a new system of materials for potential thermoelectric applications will be discussed. Some of the newer concepts such as low-dimensional systems and Slack's phononglass, electron-crystal concept will be discussed. Current strategies for minimizing lattice thermal conductivity and also minimum requirements for thermopower will be presented. The emphasis of this paper will be to identify some of the more recent promising bulk materials and discuss the challenges and issues related to each. This paper is targeted more at “newcomers” to the field and does not discuss some of the very interesting results that are being reported in the thin film and superlattice materials. Some of the bulk materials which will be discussed include complex chalcogenides (e.g.CsBi4Te6 and pentatellurides such as the Zr1−XHfXTe5 system), half-Heusler alloys (e.g. TiNiSn1−XSbX), ceramic oxides (NaCo4O2), skutterudites (e.g. YbXCo4−XSb12 or EuXCo4−XSb12) and clathrates (e.g. Sr8Ga16Ge30). Each of these systems is distinctly different yet each exhibits some prospect as a potential thermoelectric material. Results will be presented and discussed on each system of materials.

Thermoelectric Material SnPb2Bi2S6: The 4,4L Member of Lillianite Homologous Series with Low Lattice Thermal Conductivity

2018 ◽  
Vol 58 (2) ◽  
pp. 1339-1348
Author(s):  
Jingpeng Li ◽  
Yiming Zhou ◽  
Shiqiang Hao ◽  
Tianyan Zhang ◽  
Chris Wolverton ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Material ◽  
Homologous Series ◽  
Lattice Thermal Conductivity

Controlling Lattice Thermal Conductivity via Coherent Phonon Manipulation

2013 ◽  
Author(s):  
Yan Zhang ◽  
Yaguo Wang ◽  
Alan J. H. McGaughey
Keyword(s):  
Thermal Conductivity ◽  
Thermal Management ◽  
Lattice Thermal Conductivity ◽  
Phonon Frequency ◽  
Quasi Equilibrium ◽  
Coherent Phonon ◽  
Phonon Generation ◽  
Coherent Phonons ◽  
The Impact ◽  
Very Low Temperature

Controlling thermal conductivity of materials is very important in various applications, such as thermal management and energy conversion. We have been utilizing femtosecond phonon spectroscopy to excite and detect coherent phonons in various materials. However, the impact of coherent phonons to overall heat transport is still unknown. In this paper, we developed a small perturbation model in molecular dynamics (MD) to simulate coherent phonons and investigate the effect on thermal conductivity in bismuth telluride. The phonon frequency and lifetime predicted by our model agree very well with experimental results. It is found that at very low temperature, the lattice thermal conductivity, predicted by quasi-equilibrium Green-Kubo method, can be greatly enhanced upon coherent phonon generation. Our results suggest that it is possible to control lattice thermal conductivity effectively via manipulating coherent phonons.

scholarly journals Ternary selenides A2Sb4Se8 (A = K, Rb and Cs) as an n-type thermoelectric material with high power factor and low lattice thermal conductivity: importance of the conformationally flexible Sb–Se–Se–Sb bridges

RSC Advances ◽  
2020 ◽  
Vol 10 (24) ◽  
pp. 14415-14421
Author(s):  
Changhoon Lee ◽  
Sujee Kim ◽  
Won-Joon Son ◽  
Ji-Hoon Shim ◽  
Myung-Hwan Whangbo
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Properties ◽  
Thermoelectric Material ◽  
Power Factor ◽  
High Power ◽  
High Performance ◽  
Lattice Thermal Conductivity ◽  
High Power Factor

The ternary selenides A2Sb4Se8 (A = K, Rb, Cs) are predicted to be a high-performance n-type thermoelectric material, and the conformationally-flexible Sb–Se(2)–Se(2)–Sb bridges are crucial in determining the thermoelectric properties of A2Sb4Se8.

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