Oxygen diffusion and surface exchange coefficients determined under high pressure: comparisons between oxygen deficient vs. oxygen over-stoichiometric air electrode materials
LAURENCIN, Jérôme
Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
SDANGHI, Giuseppe
Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
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Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
LAURENCIN, Jérôme
Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
SDANGHI, Giuseppe
Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
< Reduce
Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Language
en
Communication dans un congrès
This item was published in
EFCF 2022 : 15th European SOFC & SOE Forum, 5-8 July 2022, Lucerne, Switzerland : proceedings, EFCF 2022 : 15th European SOFC & SOE Forum, 5-8 July 2022, Lucerne, Switzerland : proceedings, EFCF 2022: 15th European SOFC & SOE Forum, 2022-07-05, Lucerne. 2022p. B1503 (12 pages)
English Abstract
MIEC (Mixed Ionic Electronic Conductors) oxides combine, in addition to a high electronic conductivity, high oxygen diffusivity (D) and oxygen surface exchange (k) coefficients. These properties can be directly determined ...Read more >
MIEC (Mixed Ionic Electronic Conductors) oxides combine, in addition to a high electronic conductivity, high oxygen diffusivity (D) and oxygen surface exchange (k) coefficients. These properties can be directly determined thanks to the so-called IEDP (Isotopic Exchange Depth Profiling) method, which leads to determine the tracer coefficients D* and k*. To date, the reported measurements in the literature have beenperformed at ambient pressure and even below. However, for a higher efficiency of hydrogen production at the system level, or for a ‘Power-to-Gas’ application, it is envisaged to operate the Solid Oxide Electrolysers (SOE) at high pressures, between 10 to 60 bars. In this frame, it becomes mandatory to assess the oxygen reduction/oxidation and the transport properties of the oxygen electrodes materials in the operating conditions, i.e. when there are submitted to such high pressure (HP) at high temperature.Read less <
English Keywords
Oxygen diffusion
Electrode materials
Surface exchange coefficients
High pressure
Origin
Hal imported