Texture-dependent thermoelectric properties of nano-structured Bi2Te3

[Display omitted] •Achieving texture-degree-control to control the thermoelectric performance of layered-structured materials.•Proposing that the texture degree of Bi2Te3-based materials should be properly designed.•Linking nanostructure engineering with texture engineering to manipulate the thermoe...

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Bibliographic Details
Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2020-05, Vol.388, p.124295, Article 124295
Main Authors: Bao, Deyu, Chen, Jie, Yu, Yuan, Liu, Weidi, Huang, Linsen, Han, Guang, Tang, Jun, Zhou, Dali, Yang, Lei, Chen, Zhi-Gang
Format: Article
Language:English
Subjects:
Bi2Te3
Nanostructure engineering
Texture engineering
Thermoelectric
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Summary:[Display omitted] •Achieving texture-degree-control to control the thermoelectric performance of layered-structured materials.•Proposing that the texture degree of Bi2Te3-based materials should be properly designed.•Linking nanostructure engineering with texture engineering to manipulate the thermoelectric properties. In this study, Bi2Te3 nanostructures were synthesized with controlled morphologies by using a solvothermal process and then sintered by spark plasma sintering to obtain bulk samples with controllable texture degrees. The sintered nanostructured Bi2Te3 pellets show texture-dependent thermoelectric properties, in which their Seebeck coefficient, electrical conductivity and thermal conductivity can be optimized by the proper texture design to simultaneously secure a high carrier mobility and strong phonon scattering, resulting in a peak ZT value of ~0.69 at 333 K. This study reveals the potential of texture engineering in developing high performance anisotropic thermoelectric materials.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2020.124295