TY - JOUR
T1 - Influence of oxygen partial pressure on the oxygen diffusion and surface exchange coefficients in mixed conductors
AU - Geffroy, P.-M.
AU - Guironnet, L.
AU - Bouwmeester, H.J.M.
AU - Chartier, T.
AU - Grenier, J.C.
AU - Bassat, J.-M.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - The performances of mixed ionic and electronic conductors is used in many applications, such as oxygen transport membranes or electrodes in solid oxide fuel cells. The performances of these systems depend mainly on two fundamental parameters including oxygen diffusion (DO) and the oxygen exchange coefficient (k). This work focuses on the impact of the oxygen partial pressure on oxygen diffusion and surface exchange coefficients of mixed conducting materials, as reported studies are scarce in the literature. In this way, two different mixed conducting materials are studied, namely, La0.6Sr0.4Fe0.6Ga0.4O3-δ, a perovskite-type material, and the nickelate La2NiO4+δ. The DO and k coefficients are determined by a specific oxygen permeation measurement and by the isotopic exchange depth profile method.
AB - The performances of mixed ionic and electronic conductors is used in many applications, such as oxygen transport membranes or electrodes in solid oxide fuel cells. The performances of these systems depend mainly on two fundamental parameters including oxygen diffusion (DO) and the oxygen exchange coefficient (k). This work focuses on the impact of the oxygen partial pressure on oxygen diffusion and surface exchange coefficients of mixed conducting materials, as reported studies are scarce in the literature. In this way, two different mixed conducting materials are studied, namely, La0.6Sr0.4Fe0.6Ga0.4O3-δ, a perovskite-type material, and the nickelate La2NiO4+δ. The DO and k coefficients are determined by a specific oxygen permeation measurement and by the isotopic exchange depth profile method.
KW - Mixed conductor
KW - Oxygen isotopic exchange
KW - Oxygen partial pressure
KW - Oxygen surface exchanges
KW - 2023 OA procedure
UR - http://www.scopus.com/inward/record.url?scp=85044510959&partnerID=8YFLogxK
U2 - 10.1016/j.jeurceramsoc.2018.03.034
DO - 10.1016/j.jeurceramsoc.2018.03.034
M3 - Article
AN - SCOPUS:85044510959
SN - 0955-2219
VL - 39
SP - 59
EP - 65
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 1
ER -
