PrBaCo2O6−δ-Ce0.8Sm0.2O1.9 Composite Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells: Stability and Cation Interdiffusion

The single-phase oxide PrBaCo2O6−δ and composites (100 − y)PrBaCo2O6−δ-yCe0.8Sm0.2</s...

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Main Authors:	Dmitry Tsvetkov, Nadezhda Tsvetkova, Ivan Ivanov, Dmitry Malyshkin, Vladimir Sereda, Andrey Zuev
Format:	Article
Language:	English
Published:	MDPI AG 2019-01-01
Series:	Energies
Subjects:	double perovskite solid oxide fuel cells chemical compatibility interdiffusion electrical conductivity thermal expansion
Online Access:	https://www.mdpi.com/1996-1073/12/3/417

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spelling	doaj-075c802f553d4392b7334b81ef6f9e0d2020-11-25T01:59:03ZengMDPI AGEnergies1996-10732019-01-0112341710.3390/en12030417en12030417PrBaCo<sub>2</sub>O<sub>6−δ</sub>-Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> Composite Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells: Stability and Cation InterdiffusionDmitry Tsvetkov0Nadezhda Tsvetkova1Ivan Ivanov2Dmitry Malyshkin3Vladimir Sereda4Andrey Zuev5Department of Physical and Inorganic Chemistry, Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg 620000, RussiaDepartment of Physical and Inorganic Chemistry, Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg 620000, RussiaDepartment of Physical and Inorganic Chemistry, Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg 620000, RussiaDepartment of Physical and Inorganic Chemistry, Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg 620000, RussiaDepartment of Physical and Inorganic Chemistry, Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg 620000, RussiaDepartment of Physical and Inorganic Chemistry, Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg 620000, RussiaThe single-phase oxide PrBaCo<sub>2</sub>O<sub>6−δ</sub> and composites (100 − <i>y</i>)PrBaCo<sub>2</sub>O<sub>6−δ</sub>-<i>y</i>Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> (<i>y</i> = 10⁻30 wt.%) were investigated as cathode materials for intermediate-temperature solid oxide fuel cells. The chemical compatibility, cation interdiffusion, thermal expansion and dc conductivity were studied. As a result, strong interdiffusion of Pr and Sm was found between PrBaCo<sub>2</sub>O<sub>6−δ</sub> and Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub>. This leads to only insignificantly decreasing thermal expansion coefficient of composite with increasing fraction of Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> and, thus, mixing PrBaCo<sub>2</sub>O<sub>6−δ</sub> with Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> does not improve thermal expansion behavior of the cathode material. Moreover, formation of poorly-conducting BaCeO<sub>3</sub>, caused by chemical interaction between the double perovskite and doped ceria, was shown to lead to pronounced drop in the electrical conductivity of the composite cathode material with increasing Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> content.https://www.mdpi.com/1996-1073/12/3/417double perovskitesolid oxide fuel cellschemical compatibilityinterdiffusionelectrical conductivitythermal expansion
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Dmitry Tsvetkov Nadezhda Tsvetkova Ivan Ivanov Dmitry Malyshkin Vladimir Sereda Andrey Zuev
spellingShingle	Dmitry Tsvetkov Nadezhda Tsvetkova Ivan Ivanov Dmitry Malyshkin Vladimir Sereda Andrey Zuev PrBaCo<sub>2</sub>O<sub>6−δ</sub>-Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> Composite Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells: Stability and Cation Interdiffusion Energies double perovskite solid oxide fuel cells chemical compatibility interdiffusion electrical conductivity thermal expansion
author_facet	Dmitry Tsvetkov Nadezhda Tsvetkova Ivan Ivanov Dmitry Malyshkin Vladimir Sereda Andrey Zuev
author_sort	Dmitry Tsvetkov
title	PrBaCo<sub>2</sub>O<sub>6−δ</sub>-Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> Composite Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells: Stability and Cation Interdiffusion
title_short	PrBaCo<sub>2</sub>O<sub>6−δ</sub>-Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> Composite Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells: Stability and Cation Interdiffusion
title_full	PrBaCo<sub>2</sub>O<sub>6−δ</sub>-Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> Composite Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells: Stability and Cation Interdiffusion
title_fullStr	PrBaCo<sub>2</sub>O<sub>6−δ</sub>-Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> Composite Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells: Stability and Cation Interdiffusion
title_full_unstemmed	PrBaCo<sub>2</sub>O<sub>6−δ</sub>-Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> Composite Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells: Stability and Cation Interdiffusion
title_sort	prbaco<sub>2</sub>o<sub>6−δ</sub>-ce<sub>0.8</sub>sm<sub>0.2</sub>o<sub>1.9</sub> composite cathodes for intermediate-temperature solid oxide fuel cells: stability and cation interdiffusion
publisher	MDPI AG
series	Energies
issn	1996-1073
publishDate	2019-01-01
description	The single-phase oxide PrBaCo<sub>2</sub>O<sub>6−δ</sub> and composites (100 − <i>y</i>)PrBaCo<sub>2</sub>O<sub>6−δ</sub>-<i>y</i>Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> (<i>y</i> = 10⁻30 wt.%) were investigated as cathode materials for intermediate-temperature solid oxide fuel cells. The chemical compatibility, cation interdiffusion, thermal expansion and dc conductivity were studied. As a result, strong interdiffusion of Pr and Sm was found between PrBaCo<sub>2</sub>O<sub>6−δ</sub> and Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub>. This leads to only insignificantly decreasing thermal expansion coefficient of composite with increasing fraction of Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> and, thus, mixing PrBaCo<sub>2</sub>O<sub>6−δ</sub> with Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> does not improve thermal expansion behavior of the cathode material. Moreover, formation of poorly-conducting BaCeO<sub>3</sub>, caused by chemical interaction between the double perovskite and doped ceria, was shown to lead to pronounced drop in the electrical conductivity of the composite cathode material with increasing Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> content.
topic	double perovskite solid oxide fuel cells chemical compatibility interdiffusion electrical conductivity thermal expansion
url	https://www.mdpi.com/1996-1073/12/3/417
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_version_	1724966127548760064

PrBaCo<sub>2</sub>O<sub>6−δ</sub>-Ce<sub>0.8</sub>Sm<sub>0.2</sub>O<sub>1.9</sub> Composite Cathodes for Intermediate-Temperature Solid Oxide Fuel Cells: Stability and Cation Interdiffusion

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