Composites between Perovskite and Layered Co-Based Oxides for Modification of the Thermoelectric Efficiency
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Characterization
3. Results
3.1. Multiphase Composites between Co-Based Perovskites and Layered Oxides
3.2. Thermoelectric Properties of Multiphase Composites
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Samples | Co 2p | Binding Energy, eV | Ca 2p | Binding Energy, eV | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Co3+ | Co2+ | Co3+ | Co2+ | Co2+ sat | Co3+ sat | Ca (A) | Ca (B) | Ca2+ (A) 2p3/2 | Ca2+ (A) 2p3/2 | Ca2+ (B) 2p1/2 | Ca2+ (B) 2p1/2 | |
LCO | 71.3 | 28.7 | 779.6 | 781.9 | 787.6 | 789.3 | - | - | - | - | - | - |
LCO80Ca20 | 56.8 | 43.2 | 21.9 | 78.1 | 345.0 | 346.8 | 348.8 | 350.5 | ||||
LCO20Ca80 | 76.6 | 23.4 | 64.0 | 36.0 | 345.0 | 346.8 | 348.8 | 350.5 | ||||
Ca3Co4O9 | 68.1 | 31.9 | 56.3 | 43.7 | 345.0 | 346.8 | 348.8 | 350.5 |
Samples | ρ (Ω·cm) at 298 K | CM (cm2/Vs) at 298 K | CD (cm−3) at 298 K | S, mV/K | PF PF = S2/ρ, μW/(K2·cm) | λ, W/(m·K) ±0.04 | Figure of Merit S2T/(ρ·λ) T = 298K |
---|---|---|---|---|---|---|---|
LCO | 0.065 | 2 | 3.0 × 1018 | 234 | 0.84 | 0.157 | 0.16 |
LCO80Ca20 | 0.021 | 11 | 4.2 × 1018 | 208 | 2.06 | 0.179 | 0.34 |
LCO20Ca80 | 0.012 | 49 | 1.1 × 1018 | 137 | 1.56 | 0.467 | 0.10 |
Ca3Co4O9 | 0.010 | 1050 | 0.7 × 1018 | 130 | 1.69 | 0.620 | 0.08 |
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Harizanova, S.; Faulques, E.; Corraze, B.; Payen, C.; Zając, M.; Wilgocka-Ślęzak, D.; Korecki, J.; Atanasova, G.; Stoyanova, R. Composites between Perovskite and Layered Co-Based Oxides for Modification of the Thermoelectric Efficiency. Materials 2021, 14, 7019. https://doi.org/10.3390/ma14227019
Harizanova S, Faulques E, Corraze B, Payen C, Zając M, Wilgocka-Ślęzak D, Korecki J, Atanasova G, Stoyanova R. Composites between Perovskite and Layered Co-Based Oxides for Modification of the Thermoelectric Efficiency. Materials. 2021; 14(22):7019. https://doi.org/10.3390/ma14227019
Chicago/Turabian StyleHarizanova, Sonya, Eric Faulques, Benoit Corraze, Christophe Payen, Marcin Zając, Dorota Wilgocka-Ślęzak, Józef Korecki, Genoveva Atanasova, and Radostina Stoyanova. 2021. "Composites between Perovskite and Layered Co-Based Oxides for Modification of the Thermoelectric Efficiency" Materials 14, no. 22: 7019. https://doi.org/10.3390/ma14227019