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Nanostructured Composites of Bi1−xSbx Nanoparticles and Carbon Nanotubes and the Characterization of Their Thermoelectric Properties

Güneş, Ekrem and Gundlach, Felix and Elm, Matthias T. and Klar, Peter J. and Schlecht, Sabine and Wickleder, Mathias S. and Müller, Eckhard (2017) Nanostructured Composites of Bi1−xSbx Nanoparticles and Carbon Nanotubes and the Characterization of Their Thermoelectric Properties. ACS Applied Materials and Interfaces, 9, pp. 44756-44765. American Chemical society (ACS). DOI: 10.1021/acsami.7b17768 ISSN 1944-8244

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Abstract

The impact of inclusions of carbon nanotubes (CNT) on the thermoelectric properties of nanostructured Bi1–xSbx alloys with an Sb content between 10 and 20% was investigated for varying amounts of CNT. Three series of Bi1–xSbx pellets with 0, 0.3, and 0.5 wt % CNT were synthesized by mechanical alloying followed by uniaxial pressing. The resistivity was investigated in the temperature range from 30 to 500 K, revealing an enlargement of the band gap due to nanostructuring of the Bi1–xSbx alloy, which is even more pronounced for alloys including CNT. This enlargement is attributed to a modification of the interface between the Bi1–xSbx nanoparticles by a graphene-like coating, which is formed during the fabrication process due to the addition of CNT. Measurements of the Seebeck coefficient and the thermal conductivity were also performed to determine the thermoelectric properties. In total, the CNT-containing samples show a significant improvement of the figure of merit up to 250% for the Bi0.88Sb0.12 composition with 0.3 wt % CNT due to the interface modification between the nanoparticles, demonstrating the beneficial effect of CNT on the thermoelectric properties.

Item URL in elib:https://elib.dlr.de/119420/
Document Type:Article
Title:Nanostructured Composites of Bi1−xSbx Nanoparticles and Carbon Nanotubes and the Characterization of Their Thermoelectric Properties
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Güneş, EkremInstitute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, D-35392 Giessen, GermanyUNSPECIFIED
Gundlach, FelixInstitute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, D-35392 Giessen, Germany and Center for Materials Research (LaMa) Justus Liebig University Giessen, Heinrich-Buff-Ring 16, D-35392 Giessen, GermanyUNSPECIFIED
Elm, Matthias T.Institute of Physical Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17 and Center for Materials Research (LaMa) and ∥Institute of Experimental Physics I, Justus Liebig University Giessen, Heinrich-Buff-Ring 16, D-35392 Giessen, GermanyUNSPECIFIED
Klar, Peter J.Center for Materials Research (LaMa) and Institute of Experimental Physics I, Justus Liebig University Giessen, Heinrich-Buff-Ring 16, D-35392 Giessen, GermanyUNSPECIFIED
Schlecht, SabineInstitute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, D-35392 Giessen, GermanyUNSPECIFIED
Wickleder, Mathias S.Institute of Inorganic and Analytical Chemistry, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, D-35392 Giessen, Germany and Center for Materials Research (LaMa) Justus Liebig University Giessen, Heinrich-Buff-Ring 16, D-35392 Giessen, 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
Date:4 December 2017
Journal or Publication Title:ACS Applied Materials and Interfaces
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:9
DOI :10.1021/acsami.7b17768
Page Range:pp. 44756-44765
Publisher:American Chemical society (ACS)
ISSN:1944-8244
Status:Published
Keywords:Thermoelectric material, nanocomposite, carbon nanotubes, figure of merit, BiSb
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Thermal Energy Storage
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Thermochemical Processes (Storage)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Thermoelectric Materials and Systems
Deposited By: Yasseri, Mohammad
Deposited On:08 Nov 2018 10:17
Last Modified:08 Nov 2018 10:17

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