Robust doped BaCeO3-δ electrolyte for IT-SOFCs
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چکیده
منابع مشابه
Surface Modification of a Doped BaCeO3 to Function as an Electrolyte and as an Anode for SOFCs
Dual functions of BaCe0.8Y0.2O3−a ~BCY! as an electrolyte and as an anode were improved for solid oxide fuel cell ~SOFC! applications. A porous Ce-rich phase with fluorite structure was formed with a depth of ,10 mm from the BCY surface by vaporization of BaO from the BCY surface at 1700°C. The resulting BCY surface showed enough electronic conductivity to provide electrical collection and a hi...
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The site incorporation mechanism of M dopants into ABO3 perovskites controls the overall defect chemistry and thus their transport properties. For charge balance reasons, incorporation onto the A site would require the creation of negatively charged point defects, such as cation vacancies, whereas incorporation onto the B site is accompanied by the generation of positively charged defects, typi...
متن کاملChemically Stable Proton Conducting Doped BaCeO3 -No More Fear to SOFC Wastes
Development of chemically stable proton conductors for solid oxide fuel cells (SOFCs) will solve several issues, including cost associated with expensive inter-connectors, and long-term durability. Best known Y-doped BaCeO3 (YBC) proton conductors-based SOFCs suffer from chemical stability under SOFC by-products including CO2 and H2O. Here, for the first time, we report novel perovskite-type Ba...
متن کاملAnomalous X-ray diffraction study of Pr-substituted BaCeO3 - δ.
The effect of Pr doping on the crystal structure and site occupancy was studied for the nominally synthesized BaCe1 - xPrxO3 - δ (x = 0, 0.2, 0.4, 0.6 and 0.8) perovskites using anomalous X-ray powder diffraction (AXRD) data and Rietveld analysis. Crystal structure parameters were accurately determined using 10,000 eV photons, and the Pr occupancy was refined using data collected with 5962 eV p...
متن کاملAnelastic Relaxation of Protonic Defects in M3+-Doped BaCeO3
When perovskite-structured BaCe03 is doped with M ~ + ions (e.g., ~ d ~ + , Gd3+,yb33 that substitute on ce4+ sites, oxygen-ion vacancies are created for charge compensation. However, when treated in water vapor, the vacancies are replaced by protons, which take the form of OH' ions. This treatment makes the materials a good protonic conductor. Questions about the defect structure of the proton...
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ژورنال
عنوان ژورنال: Ionics
سال: 2017
ISSN: 0947-7047,1862-0760
DOI: 10.1007/s11581-017-2086-x