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

Autor:	Dmitry S. Tsvetkov, Dmitry Malyshkin, Andrey Yu. Zuev, I.L. Ivanov, Vladimir V. Sereda, Nadezhda S. Tsvetkova
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	PEROVSKITE Composite number 02 engineering and technology double perovskite lcsh:Technology 01 natural sciences Thermal expansion law.invention chemistry.chemical_compound BARIUM COMPOUNDS law SAMARIUM COMPOUNDS INTERDIFFUSION DOUBLE PEROVSKITES Drop (liquid) COBALT COMPOUNDS EXPANSION 021001 nanoscience & nanotechnology GAS FUEL PURIFICATION THERMAL EXPANSION Cathode ELECTRICAL CONDUCTIVITY FUEL CELLS PRASEODYMIUM COMPOUNDS THERMAL EXPANSION COEFFICIENTS POSITIVE IONS interdiffusion CERIUM OXIDE 0210 nano-technology INTERDIFFUSION (SOLIDS) Control and Optimization Materials science SOLID OXIDE FUEL CELLS (SOFC) Oxide Energy Engineering and Power Technology COMPOSITE CATHODE MATERIAL THERMAL EXPANSION BEHAVIOR 010402 general chemistry chemical compatibility Electrical resistivity and conductivity CATHODES Electrical and Electronic Engineering Engineering (miscellaneous) CHEMICAL INTERACTIONS thermal expansion solid oxide fuel cells electrical conductivity lcsh:T Renewable Energy Sustainability and the Environment Doping 0104 chemical sciences CHEMICAL COMPATIBILITY Chemical engineering chemistry INTERMEDIATE TEMPERATURE SOLID OXIDE FUEL CELL ELECTRIC CONDUCTIVITY Fuel cells DOUBLE PEROVSKITE SOLID OXIDE FUEL CELLS Energy (miscellaneous)
Zdroj:	Energies Volume 12 Issue 3 Energies, Vol 12, Iss 3, p 417 (2019)
ISSN:	1996-1073
DOI:	10.3390/en12030417
Popis:	The single-phase oxide PrBaCo2O6&minus &delta and composites (100 &minus y)PrBaCo2O6&minus yCe0.8Sm0.2O1.9 (y = 10&ndash 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 PrBaCo2O6&minus and Ce0.8Sm0.2O1.9. This leads to only insignificantly decreasing thermal expansion coefficient of composite with increasing fraction of Ce0.8Sm0.2O1.9 and, thus, mixing PrBaCo2O6&minus with Ce0.8Sm0.2O1.9 does not improve thermal expansion behavior of the cathode material. Moreover, formation of poorly-conducting BaCeO3, 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 Ce0.8Sm0.2O1.9 content.
Databáze:	OpenAIRE
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