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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Kočí, Jan | Prague |
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| Azam, Siraj |
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| Ali, M. A. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Rignanese, Gian-Marco |
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Cascos, V.
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (2/2 displayed)
- 2022BaFe<sub>0.875</sub>Re<sub>0.125</sub>O<sub>3−<i>δ</i> </sub> and BaFe<sub>0.75</sub>Ta<sub>0.25</sub>O<sub>3−<i>δ</i> </sub> as potential cathodes for solid-oxide fuel-cells: a structural study from neutron diffraction data
- 2017Design of Sr0.7R0.3CoO3-δ(R = Tb and Er) Perovskites Performing as Cathode Materials in Solid Oxide Fuel Cellscitations
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article
Design of Sr0.7R0.3CoO3-δ(R = Tb and Er) Perovskites Performing as Cathode Materials in Solid Oxide Fuel Cells
Abstract
<p>Sr0.7R0.3CoO3-δ (R = Tb and Er) tetragonal perovskites have been prepared and evaluated as mixed ionic-electronic cathodes for SOFC. Neutron powder diffraction (NPD) measurements evidenced that both compounds are oxygen hypo-stoichiometric with long-range order of oxygen vacancies that leads to a tetragonal perovskite-type superstructure (s.g. I4/mmm) stable within the whole temperature range under study. The oxygen vacancies located mainly in the equatorial oxygen positions exhibit large displacement factors. The high oxygen mobility in Sr0.7Tb0.3CoO3-δ was confirmed by 18O oxygen labeling followed by Secondary Ion Mass Spectrometry (SIMS) with values of oxygen self-diffusion of 1.29 × 10-10 cm2/s at 525°C. Polarization resistances with LSGM as electrolyte gave values as low as 0.011 Ω·cm2 and maximum output powers of 570 mW/cm2 at 850°C were obtained in test cells set in electrolyte-supported configuration. Electrical conductivity, thermal and chemical expansion and stability measurements confirm the potential of these materials as cathodes for SOFC.</p>