中文版 | English
Title

Dramatic Enhancement of Thermoelectric Performance in PbTe by Unconventional Grain Shrinking in the Sintering Process

Author
Corresponding AuthorHe, Jiaqing; Fu, Liangwei; Xu, Biao
Publication Years
2022-08-01
DOI
Source Title
ISSN
0935-9648
EISSN
1521-4095
Abstract

Nanostructure engineering is a key strategy for tailoring properties in the fields of batteries, solar cells, thermoelectrics, and so on. Limited by grain coarsening, however, the nanostructure effect gradually degrades during the materials' manufacturing and in-service period. Herein, a strategy of cleavage-fracture for grain shrinking is developed in a Pb0.98Sb0.02Te sample during sintering, and the grain size remains stable after repeated tests. Moreover, the initial grain boundary is filled by fractured slender grains and enriched by dislocations, evolving into a hierarchical grain-boundary structure. The lattice thermal conductivity (k(lat)) is greatly reduced to approach the amorphous limit. As a result, a record-high ZT value of approximate to 1.9 is obtained at 815 K in the n-type Pb0.98Sb0.02Te sample and a decent efficiency of 6.7% in thermoelectric device. This strategy for grain shrinking will shed light on the application of nanostructure engineering under high temperature and extreme conditions in other material systems.

Keywords
URL[Source Record]
Indexed By
SCI ; EI
Language
English
Important Publications
NI Journal Papers
SUSTech Authorship
Corresponding
Funding Project
National Natural Science Foundation of China[
WOS Research Area
Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS Subject
Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS Accession No
WOS:000842176500001
Publisher
EI Accession Number
20223412586408
EI Keywords
Antimony Compounds ; Cell Engineering ; Coarsening ; Fracture ; IV-VI Semiconductors ; Lead Compounds ; Nanostructures ; Sintering ; Tellurium Compounds ; Thermal Conductivity ; Thermal Engineering ; Thermoelectricity
ESI Classification Code
Biomedical Engineering:461.1 ; Thermodynamics:641.1 ; Electricity: Basic Concepts And Phenomena:701.1 ; Semiconducting Materials:712.1 ; Nanotechnology:761 ; Solid State Physics:933 ; Materials Science:951
ESI Research Field
MATERIALS SCIENCE
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:12
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/382565
DepartmentDepartment of Physics
Affiliation
1.Nanjing Univ Sci & Technol, Sch Chem & Chem Engn, Nanjing 210094, Peoples R China
2.Nanjing Univ, State Key Lab Coordinat Chem, Sch Chem & Chem Engn, Nanjing 210093, Peoples R China
3.Southern Univ Sci & Technol, Dept Phys, Shenzhen Key Lab Thermoelect Mat, Shenzhen 518055, Peoples R China
Corresponding Author AffilicationDepartment of Physics
Recommended Citation
GB/T 7714
Xu, Pengfei,Zhao, Wei,Liu, Xixi,et al. Dramatic Enhancement of Thermoelectric Performance in PbTe by Unconventional Grain Shrinking in the Sintering Process[J]. Advanced Materials,2022.
APA
Xu, Pengfei.,Zhao, Wei.,Liu, Xixi.,Jia, Baohai.,He, Jiaqing.,...&Xu, Biao.(2022).Dramatic Enhancement of Thermoelectric Performance in PbTe by Unconventional Grain Shrinking in the Sintering Process.Advanced Materials.
MLA
Xu, Pengfei,et al."Dramatic Enhancement of Thermoelectric Performance in PbTe by Unconventional Grain Shrinking in the Sintering Process".Advanced Materials (2022).
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