Enhancement of Thermoelectric Performance in Bi0.5Sb1.5Te3 Particulate Composites Including Ferroelectric BaTiO3 Nanodots
Journal article
Cheng, Y., Yang, J., Luo, Y., Li, Wang, Vtyurin, A., Jiang, Q., Dunn, S. and Yan, H. (2022). Enhancement of Thermoelectric Performance in Bi0.5Sb1.5Te3 Particulate Composites Including Ferroelectric BaTiO3 Nanodots. ACS Applied Materials & Interfaces. 14 (32), p. 37204–37212. https://doi.org/10.1021/acsami.2c10424
Authors | Cheng, Y., Yang, J., Luo, Y., Li, Wang, Vtyurin, A., Jiang, Q., Dunn, S. and Yan, H. |
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Abstract | An increasing number of studies have reported producing composite structures by combining thermoelectric and functional materials. However, combining energy filtering and ferroelectric polarization to enhance the dimensionless figure of merit thermoelectric ZT remains elusive. Here we report a composite that contains nanostructured BaTiO3 embedded in a Bi0.5Sb1.5Te3 matrix. We show that ferroelectric BaTiO3 particles are evenly composited with Bi0.5Sb1.5Te3 grains reducing the concentration of free charge carriers with increasing BaTiO3 content. Additionally, as a result of the energy-filtering effect and ferroelectric polarization, the Seebeck coefficient was improved by ∼10% with a ∼10% improvement in power factors. The BaTiO3 phase can effectively scatters phonons reducing lattice thermal conductivity κl (0.5 W m–1 K–1) and increasing ZT to 1.31 at 363 K in Bi0.5Sb1.5Te3 composites with 2 vol % BaTiO3 content giving an improvement of ∼25% over pure Bi0.5Sb1.5Te3. Our work indicates that the introduction of ferroelectric nanoparticles is an effective method for optimizing the ZT of Bi0.5Sb1.5Te3-based thermoelectric materials. |
Keywords | General Materials Science |
Year | 2022 |
Journal | ACS Applied Materials & Interfaces |
Journal citation | 14 (32), p. 37204–37212 |
Publisher | American Chemical Society (ACS) |
ISSN | 1944-8244 |
1944-8252 | |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acsami.2c10424 |
Web address (URL) | https://pubs.acs.org/doi/abs/10.1021/acsami.2c10424 |
Funder/Client | Department of Scientific and Industrial Research, Ministry of Science and Technology, India |
National Natural Science Foundation of China | |
Publication dates | |
Online | 02 Aug 2022 |
Publication process dates | |
Accepted | 26 Jul 2022 |
Deposited | 20 Sep 2022 |
Accepted author manuscript | License File Access Level Open |
Additional information | This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials and Interfaces, copyright © 2022 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsami.2c10424 |
https://openresearch.lsbu.ac.uk/item/91v2q
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Accepted author manuscript
BaTiO3 and Bi0.5Sb1.5Te3particulate composites -2021-12-11 (002).docx | ||
License: CC BY-NC 4.0 | ||
File access level: Open |
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