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Improved thermoelectric properties of nanostructured composites out of Bi1−xSbx nanoparticles and carbon phases

Güneș, Ekrem and Wickleder, Mathias S. and Müller, Eckhard and Elm, Matthias T. and Klar, Peter J. (2018) Improved thermoelectric properties of nanostructured composites out of Bi1−xSbx nanoparticles and carbon phases. AIP Advances. American Institute of Physics (AIP). DOI: doi.org/10.1063/1.5034525 ISSN 2158-3226

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Abstract

Thermoelectric figures of merit of ZT ≈ 0.4 at room temperature were achieved in nanostructured composite materials prepared by uniaxial pressing of Bi1−xSbx nanoparticles and 0.3 wt.% of a carbon phase. This constitutes a significant improvement of the low-temperature thermoelectric material Bi1−xSbx and strongly suggests the possibility of employing these materials in efficient thermoelectric devices working at room temperature. Interestingly, the beneficial effect of the carbon phase added to nanostructured Bi1−xSbx is the same for either carbon nanotubes or active carbon. This finding is attributed, on the one hand, to a combination of electronic band gap engineering due to nanostructuring and energy filtering due to graphene-like interlayers between Bi1−xSbx grains and, on the other hand, to modified phonon scattering at the grain boundaries and additional phonon scattering by agglomeration sites of carbon material on the μm scale.

Item URL in elib:https://elib.dlr.de/122854/
Document Type:Article
Title:Improved thermoelectric properties of nanostructured composites out of Bi1−xSbx nanoparticles and carbon phases
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Güneș, EkremInstitute of Inorganic and Analytical Chemistry, Justus-Liebig University, Giessen D-35392, Germany and Department of Alternative Energy Resources, Harran University, Şanlıurfa TR-63300, TurkeyUNSPECIFIED
Wickleder, Mathias S.Institute of Inorganic and Analytical Chemistry, Justus-Liebig University, Giessen D-35392, GermanyUNSPECIFIED
Müller, EckhardGerman Aerospace Center, Institute of Materials Research, Köln, Germany and Justus Liebig University Giessen, Institute of Inorganic and Analytical Chemistry, 35392 Giessen, GermanyUNSPECIFIED
Elm, Matthias T.Institute of Materials Research, German Aerospace Center (DLR), Kön D-51170, Germany and Institute of Experimental Physics I and Institute of Physical Chemistry, Justus-Liebig University, 35392 Giessen, GermanyUNSPECIFIED
Klar, Peter J.Institute of Materials Research, German Aerospace Center (DLR), Kön D-51170, Germany and Institute of Experimental Physics I, Justus-Liebig-University Gießen, Heinrich-Buff-Ring 16, 35392 Giessen, D-35392, GermanyUNSPECIFIED
Date:18 July 2018
Journal or Publication Title:AIP Advances
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :doi.org/10.1063/1.5034525
Publisher:American Institute of Physics (AIP)
ISSN:2158-3226
Status:Published
Keywords:Thermoelectric properties, Nanostructured Composites, Bi1−xSbx, Nanoparticles, Carbon phases
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - NGC-Antriebsstrang (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Thermoelectric Materials and Systems
Deposited By: Yasseri, Mohammad
Deposited On:13 Nov 2018 08:33
Last Modified:13 Nov 2018 08:33

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