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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Autores principales:	Sonya Harizanova, Eric Faulques, Benoit Corraze, Christophe Payen, Marcin Zając, Dorota Wilgocka-Ślęzak, Józef Korecki, Genoveva Atanasova, Radostina Stoyanova
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	cobalt-based perovskites misfit layered oxides thermoelectric oxides multiphase composites Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/764162e218914a82b349a6df8ea3d5a1
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spelling	oai:doaj.org-article:764162e218914a82b349a6df8ea3d5a12021-11-25T18:15:45ZComposites between Perovskite and Layered Co-Based Oxides for Modification of the Thermoelectric Efficiency10.3390/ma142270191996-1944https://doaj.org/article/764162e218914a82b349a6df8ea3d5a12021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/7019https://doaj.org/toc/1996-1944The 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).Sonya HarizanovaEric FaulquesBenoit CorrazeChristophe PayenMarcin ZającDorota Wilgocka-ŚlęzakJózef KoreckiGenoveva AtanasovaRadostina StoyanovaMDPI AGarticlecobalt-based perovskitesmisfit layered oxidesthermoelectric oxidesmultiphase compositesTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 7019, p 7019 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cobalt-based perovskites misfit layered oxides thermoelectric oxides multiphase composites Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	cobalt-based perovskites misfit layered oxides thermoelectric oxides multiphase composites Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 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
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).
format	article
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
title	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_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_sort	composites between perovskite and layered co-based oxides for modification of the thermoelectric efficiency
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/764162e218914a82b349a6df8ea3d5a1
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Composites between Perovskite and Layered Co-Based Oxides for Modification of the Thermoelectric Efficiency

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