中文版 | English
题名

Tailoring local chemical fluctuation of high-entropy structures in thermoelectric materials

作者
通讯作者He, Jiaqing
发表日期
2024-06
DOI
发表期刊
ISSN
2375-2548
EISSN
2375-2548
卷号10期号:25
摘要
In high-entropy materials, local chemical fluctuation from multiple elements inhabiting the same crystallographic site plays a crucial role in their unique properties. Using atomic-resolution chemical mapping, we identified the respective contributions of different element characteristics on the local chemical fluctuation of high-entropy structures in thermoelectric materials. Electronegativity and mass had a comparable influence on the fluctuations of constituent elements, while the radius made a slight contribution. The local chemical fluctuation was further tailored by selecting specific elements to induce large lattice distortion and strong strain fluctuation to lower lattice thermal conductivity independent of increased entropy. The chemical bond fluctuation induced by the electronegativity difference had a noticeable contribution to the composition-dependent lattice thermal conductivity in addition to the known fluctuations of mass and strain field. Our findings provide a fundamental principle for tuning local chemical fluctuation and lattice thermal conductivity in high-entropy thermoelectric materials.
© 2024 The Authors.
相关链接[来源记录]
收录类别
SCI ; EI
语种
英语
学校署名
第一 ; 通讯
资助项目
Acknowledgments: We thank h. dong (center for high Pressure Science and technology Advanced Research, Shanghai) and h. Zou (department of chemistry and Biochemistry, University of california, los Angeles) for the eXAFS data discussion. We acknowledge the SUStech core Research Facilities for SteM instrument usage. Funding: We acknowledge the financial support of the national natural Science Foundation of china (grant nos. 11934007, 52222209, and 52302262), the Science and technology innovation committee Foundation of Shenzhen (grant no. JcYJ20200109141205978), and the Outstanding talents training Fund in Shenzhen (202108). Author contributions: W.W. and J.h. designed the project. S.l., B. Jia, and B. Jiang synthesized the samples. S.l. performed the transport property and XRd measurements. W.W. performed the SteM experiments and eXAFS data analysis, W.W. and Y.h. performed the analysis of atomic-resolution SteM-edS mapping. W.W. performed the quantification of high-resolution hAAdF-SteM image. Y.W. and l.X. carried out theoretical calculations for phonon spectra. W.W. and J.h. wrote the manuscript with the help of all authors. Competing interests: the authors declare that they have no competing interests. Data and materials availability: All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials.
WOS研究方向
Science & Technology - Other Topics
WOS类目
Multidisciplinary Sciences
WOS记录号
WOS:001281804600002
出版者
EI入藏号
20242616441929
EI主题词
Chemical bonds ; Crystal lattices ; Electronegativity ; Thermal conductivity ; Thermoelectric equipment ; Thermoelectricity
EI分类号
Thermoelectric Energy:615.4 ; Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Physical Chemistry:801.4 ; Electrochemistry:801.4.1 ; Crystal Lattice:933.1.1
来源库
EV Compendex
引用统计
被引频次[WOS]:2
成果类型期刊论文
条目标识符http://sustech.caswiz.com/handle/2SGJ60CL/794469
专题理学院_物理系
南方科技大学
作者单位
1.Shenzhen Key Laboratory of Thermoelectric Materials, Department of Physics, Southern University of Science and Technology, Shenzhen; 518055, China
2.Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen; 518110, China
3.Guangdong Provincial Key Laboratory of Advanced Thermoelectric Materials and Device Physics, Southern University of Science and Technology, Shenzhen; 518055, China
第一作者单位物理系
通讯作者单位物理系;  南方科技大学
第一作者的第一单位物理系
推荐引用方式
GB/T 7714
Wang, Wu,Liu, Shixuan,Wang, Yan,et al. Tailoring local chemical fluctuation of high-entropy structures in thermoelectric materials[J]. Science Advances,2024,10(25).
APA
Wang, Wu.,Liu, Shixuan.,Wang, Yan.,Jia, Baohai.,Huang, Yi.,...&He, Jiaqing.(2024).Tailoring local chemical fluctuation of high-entropy structures in thermoelectric materials.Science Advances,10(25).
MLA
Wang, Wu,et al."Tailoring local chemical fluctuation of high-entropy structures in thermoelectric materials".Science Advances 10.25(2024).
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