Details
| Original language | English |
|---|---|
| Pages (from-to) | 4154-4159 |
| Number of pages | 6 |
| Journal | Journal of Electronic Materials |
| Volume | 49 |
| Issue number | 7 |
| Early online date | 10 Apr 2020 |
| Publication status | Published - Jul 2020 |
Abstract
Here, we present the performance of a thermoelectric (TE) module consisting of n-type (La0.12Sr0.88)0.95TiO3 and p-type Ca3Co4−xO9+δ materials. The main challenge in this investigation was operating the TE module in different atmospheric conditions, since n-type has optimum TE performance at reducing conditions, while p-type has optimum at oxidizing conditions. The TE module was exposed to two different atmospheres and demonstrated higher stability in N2 atmosphere than in air. The maximum electrical power output decreased after 40 h when the hot side was exposed to N2 at 600°C, while only 1 h at 400°C in ambient air was enough to oxidize (La0.12Sr0.88)0.95TiO3 followed by a reduced electrical power output. The module generated maximum electrical power of 0.9 mW (∼ 4.7 mW/cm2) at 600°C hot side and δT ∼ 570 K in N2, and 0.15 mW (∼ 0.8 mW/cm2) at 400°C hot side and δT ∼ 370 K in air. A stability limit of Ca3Co3.93O9+δ at ∼ 700°C in N2 was determined by in situ high-temperature x-ray diffraction.
Keywords
- (LaSr)TiO, CaCoO, electrical power output, oxidation, Oxide thermoelectric module, thermal stability, (La0.12Sr0.88)(0.95)TiO3-delta, Ca3Co4-xO9+delta
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Materials Science(all)
- Materials Chemistry
- Engineering(all)
- Electrical and Electronic Engineering
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In: Journal of Electronic Materials, Vol. 49, No. 7, 07.2020, p. 4154-4159.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Performance of a Thermoelectric Module Based on n-Type (La0.12Sr0.88)0.95TiO3−δ and p-Type Ca3Co4−xO9+δ
AU - Kanas, Nikola
AU - Skomedal, Gunstein
AU - Desissa, Temesgen Debelo
AU - Feldhoff, Armin
AU - Grande, Tor
AU - Wiik, Kjell
AU - Einarsrud, Mari Ann
N1 - Funding Information: Open Access funding provided by NTNU Norwegian University of Science and Technology incl St. Olavs Hospital - Trondheim University Hospital. We gratefully acknowledge financial support from the Research Council of Norway under the program Nano2021 to the project (number 228854) “Thermoelectric materials: Nanostructuring for improving the energy efficiency of thermoelectric generators and heat-pumps” (THELMA) conducted by NTNU, UiO, SINTEF, FFI, UiS and UiA. Dr. Magnus Rotan (NTNU) is acknowledged for technical support on HT-XRD. We also thank the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—FE928/17-1 for the financial support.
PY - 2020/7
Y1 - 2020/7
N2 - Here, we present the performance of a thermoelectric (TE) module consisting of n-type (La0.12Sr0.88)0.95TiO3 and p-type Ca3Co4−xO9+δ materials. The main challenge in this investigation was operating the TE module in different atmospheric conditions, since n-type has optimum TE performance at reducing conditions, while p-type has optimum at oxidizing conditions. The TE module was exposed to two different atmospheres and demonstrated higher stability in N2 atmosphere than in air. The maximum electrical power output decreased after 40 h when the hot side was exposed to N2 at 600°C, while only 1 h at 400°C in ambient air was enough to oxidize (La0.12Sr0.88)0.95TiO3 followed by a reduced electrical power output. The module generated maximum electrical power of 0.9 mW (∼ 4.7 mW/cm2) at 600°C hot side and δT ∼ 570 K in N2, and 0.15 mW (∼ 0.8 mW/cm2) at 400°C hot side and δT ∼ 370 K in air. A stability limit of Ca3Co3.93O9+δ at ∼ 700°C in N2 was determined by in situ high-temperature x-ray diffraction.
AB - Here, we present the performance of a thermoelectric (TE) module consisting of n-type (La0.12Sr0.88)0.95TiO3 and p-type Ca3Co4−xO9+δ materials. The main challenge in this investigation was operating the TE module in different atmospheric conditions, since n-type has optimum TE performance at reducing conditions, while p-type has optimum at oxidizing conditions. The TE module was exposed to two different atmospheres and demonstrated higher stability in N2 atmosphere than in air. The maximum electrical power output decreased after 40 h when the hot side was exposed to N2 at 600°C, while only 1 h at 400°C in ambient air was enough to oxidize (La0.12Sr0.88)0.95TiO3 followed by a reduced electrical power output. The module generated maximum electrical power of 0.9 mW (∼ 4.7 mW/cm2) at 600°C hot side and δT ∼ 570 K in N2, and 0.15 mW (∼ 0.8 mW/cm2) at 400°C hot side and δT ∼ 370 K in air. A stability limit of Ca3Co3.93O9+δ at ∼ 700°C in N2 was determined by in situ high-temperature x-ray diffraction.
KW - (LaSr)TiO
KW - CaCoO
KW - electrical power output
KW - oxidation
KW - Oxide thermoelectric module
KW - thermal stability
KW - (La0.12Sr0.88)(0.95)TiO3-delta
KW - Ca3Co4-xO9+delta
UR - http://www.scopus.com/inward/record.url?scp=85083733607&partnerID=8YFLogxK
U2 - 10.1007/s11664-020-08127-5
DO - 10.1007/s11664-020-08127-5
M3 - Article
AN - SCOPUS:85083733607
VL - 49
SP - 4154
EP - 4159
JO - Journal of Electronic Materials
JF - Journal of Electronic Materials
SN - 0361-5235
IS - 7
ER -