Enhanced Thermoelectric Performance of Nanostructured Bi2Te3 through Significant Phonon Scattering

Yang, Lei and Chen, Zhi Gang and Hong, Min and Han, Guang and Zou, Jin (2015) Enhanced Thermoelectric Performance of Nanostructured Bi2Te3 through Significant Phonon Scattering. ACS Applied Materials and Interfaces, 7 (42). pp. 23694-23699. ISSN 1944-8244

Abstract

N-type Bi2Te3 nanostructures were synthesized using a solvothermal method and in turn sintered using sparking plasma sintering. The sintered n-type Bi2Te3 pellets reserved nanosized grains and showed an ultralow lattice thermal conductivity (0.2 W m-1 K-1), which benefits from high-density small-angle grain boundaries accommodated by dislocations. Such a high phonon scattering leads an enhanced ZT of 0.88 at 400 K. This study provides an efficient method to enhance thermoelectric performance of thermoelectric nanomaterials through nanostructure engineering, making the as-prepared n-type nanostructured Bi2Te3 as a promising candidate for roomerature thermoelectric power generation and Peltier cooling.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 21 Jun 2017 04:51
Last Modified: 21 Jun 2017 04:51
Uncontrolled Keywords: Bi2Te3; enhanced thermoelectric properties; low thermal conductivity; nanostructure engineering; lattice thermal conductivity; low thermal conductivity; nanosized grains; Plasma sintering; Small-angle grain boundaries; solvothermal method; thermoelectric performance; thermoelectric properties; thermodynamics;
Fields of Research : 03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030399 Macromolecular and Materials Chemistry not elsewhere classified
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1021/acsami.5b07596
URI: http://eprints.usq.edu.au/id/eprint/31675

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