Details
| Original language | English |
|---|---|
| Pages (from-to) | 7551-7561 |
| Number of pages | 11 |
| Journal | Journal of electronic materials |
| Volume | 48 |
| Issue number | 11 |
| Early online date | 27 Aug 2019 |
| Publication status | Published - Nov 2019 |
Abstract
Thermoelectric oxide-based multiphase systems gain synergistic properties from different materials. Therefore, multiphase systems based on a thermoelectric oxide, combined with both a polymeric phase (Matrimid) and a highly electrically conducting phase (Ag, carbon black) have been investigated. Compared to single-phase porous Ca3Co4O9, the resulting composite materials showed a decreased electrical conductivity while reaching a high Seebeck coefficient of up to 200 μV/K as well as a 4 times lower thermal conductivity. The strongly enhanced phonon scattering in the multiphase system resulting in low thermal conductivity is an especially interesting concept to design thermoelectric multiphase materials. Additionally, Ioffe plots are revitalized to compare the resulting power factor and thermal properties of the composite materials. The significantly low thermal conductivity due to the heteromaterial interfaces in the composite materials especially underlines the potential of multiphase systems as thermoelectric materials.
Keywords
- composite materials, Energy harvesting, energy materials, thermoelectric materials
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Electrical and Electronic Engineering
- Materials Science(all)
- Materials Chemistry
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In: Journal of electronic materials, Vol. 48, No. 11, 11.2019, p. 7551-7561.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Low Thermal Conductivity in Thermoelectric Oxide-Based Multiphase Composites
AU - Wolf, Mario
AU - Menekse, Kaan
AU - Mundstock, Alexander
AU - Hinterding, Richard
AU - Nietschke, Frederik
AU - Oeckler, Oliver
AU - Feldhoff, Armin
N1 - Funding Information: This work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—Project Number 325156807.
PY - 2019/11
Y1 - 2019/11
N2 - Thermoelectric oxide-based multiphase systems gain synergistic properties from different materials. Therefore, multiphase systems based on a thermoelectric oxide, combined with both a polymeric phase (Matrimid) and a highly electrically conducting phase (Ag, carbon black) have been investigated. Compared to single-phase porous Ca3Co4O9, the resulting composite materials showed a decreased electrical conductivity while reaching a high Seebeck coefficient of up to 200 μV/K as well as a 4 times lower thermal conductivity. The strongly enhanced phonon scattering in the multiphase system resulting in low thermal conductivity is an especially interesting concept to design thermoelectric multiphase materials. Additionally, Ioffe plots are revitalized to compare the resulting power factor and thermal properties of the composite materials. The significantly low thermal conductivity due to the heteromaterial interfaces in the composite materials especially underlines the potential of multiphase systems as thermoelectric materials.
AB - Thermoelectric oxide-based multiphase systems gain synergistic properties from different materials. Therefore, multiphase systems based on a thermoelectric oxide, combined with both a polymeric phase (Matrimid) and a highly electrically conducting phase (Ag, carbon black) have been investigated. Compared to single-phase porous Ca3Co4O9, the resulting composite materials showed a decreased electrical conductivity while reaching a high Seebeck coefficient of up to 200 μV/K as well as a 4 times lower thermal conductivity. The strongly enhanced phonon scattering in the multiphase system resulting in low thermal conductivity is an especially interesting concept to design thermoelectric multiphase materials. Additionally, Ioffe plots are revitalized to compare the resulting power factor and thermal properties of the composite materials. The significantly low thermal conductivity due to the heteromaterial interfaces in the composite materials especially underlines the potential of multiphase systems as thermoelectric materials.
KW - composite materials
KW - Energy harvesting
KW - energy materials
KW - thermoelectric materials
UR - http://www.scopus.com/inward/record.url?scp=85071775444&partnerID=8YFLogxK
U2 - 10.1007/s11664-019-07555-2
DO - 10.1007/s11664-019-07555-2
M3 - Article
AN - SCOPUS:85071775444
VL - 48
SP - 7551
EP - 7561
JO - Journal of electronic materials
JF - Journal of electronic materials
SN - 0361-5235
IS - 11
ER -