Composites between Perovskite and Layered Co-Based Oxides for Modification of the Thermoelectric Efficiency
The common approach to modify the thermoelectric activity of oxides is based on the concept of selective metal substitution. Herein, we demonstrate an alternative approach based on the formation of multiphase composites, at which the individual components have distinctions in the electric and therma...
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2021-11-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/22/7019 |
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| author | Sonya Harizanova Eric Faulques Benoit Corraze Christophe Payen Marcin Zając Dorota Wilgocka-Ślęzak Józef Korecki Genoveva Atanasova Radostina Stoyanova |
| author_facet | Sonya Harizanova Eric Faulques Benoit Corraze Christophe Payen Marcin Zając Dorota Wilgocka-Ślęzak Józef Korecki Genoveva Atanasova Radostina Stoyanova |
| author_sort | Sonya Harizanova |
| collection | DOAJ |
| description | The common approach to modify the thermoelectric activity of oxides is based on the concept of selective metal substitution. Herein, we demonstrate an alternative approach based on the formation of multiphase composites, at which the individual components have distinctions in the electric and thermal conductivities. The proof-of-concept includes the formation of multiphase composites between well-defined thermoelectric Co-based oxides: Ni, Fe co-substituted perovskite, LaCo<sub>0.8</sub>Ni<sub>0.1</sub>Fe<sub>0.1</sub>O<sub>3</sub> (LCO), and misfit layered Ca<sub>3</sub>Co<sub>4</sub>O<sub>9</sub>. The interfacial chemical and electrical properties of composites are probed with the means of SEM, PEEM/XAS, and XPS tools, as well as the magnetic susceptibility measurements. The thermoelectric power of the multiphase composites is evaluated by the dimensionless figure of merit, ZT, calculated from the independently measured electrical resistivity (ρ), Seebeck coefficient (S), and thermal conductivity (λ). It has been demonstrated that the magnitude’s electric and thermal conductivities depend more significantly on the composite interfaces than the Seebeck coefficient values. As a result, the highest thermoelectric activity is observed at the composite richer on the perovskite (i.e., ZT = 0.34 at 298 K). |
| first_indexed | 2024-03-10T05:18:50Z |
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| id | doaj.art-764162e218914a82b349a6df8ea3d5a1 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T05:18:50Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-764162e218914a82b349a6df8ea3d5a12023-11-23T00:12:29ZengMDPI AGMaterials1996-19442021-11-011422701910.3390/ma14227019Composites between Perovskite and Layered Co-Based Oxides for Modification of the Thermoelectric EfficiencySonya Harizanova0Eric Faulques1Benoit Corraze2Christophe Payen3Marcin Zając4Dorota Wilgocka-Ślęzak5Józef Korecki6Genoveva Atanasova7Radostina Stoyanova8Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitut des Matériaux Jean Rouxel, University of Nantes, CNRS, IMN, F-44000 Nantes, FranceInstitut des Matériaux Jean Rouxel, University of Nantes, CNRS, IMN, F-44000 Nantes, FranceInstitut des Matériaux Jean Rouxel, University of Nantes, CNRS, IMN, F-44000 Nantes, FranceNational Synchrotron Radiation Centre Solaris, 30-392 Kraków, PolandJerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 30-239 Kraków, PolandNational Synchrotron Radiation Centre Solaris, 30-392 Kraków, PolandInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaInstitute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, BulgariaThe common approach to modify the thermoelectric activity of oxides is based on the concept of selective metal substitution. Herein, we demonstrate an alternative approach based on the formation of multiphase composites, at which the individual components have distinctions in the electric and thermal conductivities. The proof-of-concept includes the formation of multiphase composites between well-defined thermoelectric Co-based oxides: Ni, Fe co-substituted perovskite, LaCo<sub>0.8</sub>Ni<sub>0.1</sub>Fe<sub>0.1</sub>O<sub>3</sub> (LCO), and misfit layered Ca<sub>3</sub>Co<sub>4</sub>O<sub>9</sub>. The interfacial chemical and electrical properties of composites are probed with the means of SEM, PEEM/XAS, and XPS tools, as well as the magnetic susceptibility measurements. The thermoelectric power of the multiphase composites is evaluated by the dimensionless figure of merit, ZT, calculated from the independently measured electrical resistivity (ρ), Seebeck coefficient (S), and thermal conductivity (λ). It has been demonstrated that the magnitude’s electric and thermal conductivities depend more significantly on the composite interfaces than the Seebeck coefficient values. As a result, the highest thermoelectric activity is observed at the composite richer on the perovskite (i.e., ZT = 0.34 at 298 K).https://www.mdpi.com/1996-1944/14/22/7019cobalt-based perovskitesmisfit layered oxidesthermoelectric oxidesmultiphase composites |
| spellingShingle | Sonya Harizanova Eric Faulques Benoit Corraze Christophe Payen Marcin Zając Dorota Wilgocka-Ślęzak Józef Korecki Genoveva Atanasova Radostina Stoyanova Composites between Perovskite and Layered Co-Based Oxides for Modification of the Thermoelectric Efficiency Materials cobalt-based perovskites misfit layered oxides thermoelectric oxides multiphase composites |
| title | Composites between Perovskite and Layered Co-Based Oxides for Modification of the Thermoelectric Efficiency |
| title_full | Composites between Perovskite and Layered Co-Based Oxides for Modification of the Thermoelectric Efficiency |
| title_fullStr | Composites between Perovskite and Layered Co-Based Oxides for Modification of the Thermoelectric Efficiency |
| title_full_unstemmed | Composites between Perovskite and Layered Co-Based Oxides for Modification of the Thermoelectric Efficiency |
| title_short | Composites between Perovskite and Layered Co-Based Oxides for Modification of the Thermoelectric Efficiency |
| title_sort | composites between perovskite and layered co based oxides for modification of the thermoelectric efficiency |
| topic | cobalt-based perovskites misfit layered oxides thermoelectric oxides multiphase composites |
| url | https://www.mdpi.com/1996-1944/14/22/7019 |
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