Enhanced Thermoelectric Properties of Bi2Te3-Based Micro–Nano Fibers via Thermal Drawing and Interfacial Engineering

Sun，Min1,2; Tang，Guowu1,2,3; Wang，Hanfu4; Zhang，Ting5,6; Zhang，Pengyu2; Han，Bin2; Yang，Ming5; Zhang，Hang5; Chen，Yicong7; Chen，Jun7; Zhu，Qingfeng8; Li，Jiangyu8; Chen，Dongdan2; Gan，Jiulin2; Qian，Qi2; Yang，Zhongmin1,2

2022

10.1002/adma.202202942

ADVANCED MATERIALS   Impact Factor & Quartile

0935-9648

1521-4095

High-performance thermoelectric (TE) materials with great flexibility and stability are urgently needed to efficiently convert heat energy into electrical power. Recently, intrinsically crystalline, mechanically stable, and flexible inorganic TE fibers that show TE properties comparable to their bulk counterparts have been of interest to researchers. Despite remarkable progress in moving TE fibers toward room-temperature TE conversion, the figure-of-merit value (ZT) and bending stability still need enhancement. Herein, interfacial-engineering-enhanced TE properties of micro–nano polycrystalline TE fibers fabricated by thermally drawing BiTe-based bulks in a glass-fiber template are reported. The interfacial engineering effect comes from generating stress-induced oriented nanocrystals to increase electrical conductivity and producing strain-distorted interfaces to decrease thermal conductivity. The 4 µm-diameter fibers achieve a 40% higher ZT (≈1.4 at 300 K) than their bulk counterparts and show a reversible bending radius of 50 µm, approaching the theoretical elastic limit. This fabrication strategy works for a wide range of inorganic TE materials and benefits the development of fiber-based micro-TE devices.

Bi 2Te 3 interfacial engineering thermal drawing thermoelectric fibers

SCI ; EI

English

NI Journal Papers

Others

Natural Science Foundation of China["52002131","U1830203","62005080","52172249","51888103","91833303"] ; 2021 Talent Revitalization Plan Project for New High Performance Material Industry in Qingyuan City[2021YFJH02001] ; Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program[2017BT01X137] ; Key R&D Program of Guangzhou[202007020003] ; Innovation Academy for Light-duty Gas Turbine, Chinese Academy of Sciences[CXYJJ21-ZD-02]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000837013200001

WILEY-V C H VERLAG GMBH

20223212551296

Bismuth compounds ; Nanofibers ; Tellurium compounds ; Thermal conductivity ; Thermal Engineering ; Thermoelectricity

Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Nanotechnology:761 ; Solid State Physics:933

MATERIALS SCIENCE

2-s2.0-85135532897

Scopus

1.School of Physics and Optoelectronics,South China University of Technology,Guangzhou,510640,China
2.State Key Laboratory of Luminescent Materials and Devices,Institute of Optical Communication Materials,Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques,and Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices,School of Materials Science and Engineering,South China University of Technology,Guangzhou,510640,China
3.School of Physics and Optoelectronic Engineering,Guangdong University of Technology,Guangzhou,510006,China
4.CAS Key Laboratory of Nanosystem and Hierarchical Fabrication,National Center for Nanoscience and Technology of China,Beijing,100190,China
5.Institute of Engineering Thermophysics,Innovation Academy for Light-duty Gas Turbine,Chinese Academy of Sciences,Beijing,100190,China
6.Nanjing Institute of Future Energy System,Nanjing,211135,China
7.State Key Laboratory of Optoelectronic Materials and Technologies,Guangdong Province Key Laboratory of Display Material and Technology,School of Electronics and Information Technology,Sun Yat-sen University,Guangzhou,510275,China
8.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Sun，Min,Tang，Guowu,Wang，Hanfu,等. Enhanced Thermoelectric Properties of Bi2Te3-Based Micro–Nano Fibers via Thermal Drawing and Interfacial Engineering[J]. ADVANCED MATERIALS,2022,34.

Sun，Min.,Tang，Guowu.,Wang，Hanfu.,Zhang，Ting.,Zhang，Pengyu.,...&Yang，Zhongmin.(2022).Enhanced Thermoelectric Properties of Bi2Te3-Based Micro–Nano Fibers via Thermal Drawing and Interfacial Engineering.ADVANCED MATERIALS,34.

Sun，Min,et al."Enhanced Thermoelectric Properties of Bi2Te3-Based Micro–Nano Fibers via Thermal Drawing and Interfacial Engineering".ADVANCED MATERIALS 34(2022).