MAUVY, Fabrice; GRENIER, Jean-Claude; VULLIET, Julien; ROUGIER, Aline; BASSAT, Jean-Marc.

doi:10.1002/fuce.202200013

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MAUVY, Fabrice
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

GRENIER, Jean-Claude
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

VULLIET, Julien
Direction des Applications Militaires [DAM]

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Article de revue

Ce document a été publié dans

Fuel Cells. 2022, vol. 22, n° 1-2, p. 48-56

Wiley-VCH Verlag

Résumé en anglais

The present study focuses on an alternative structured oxygen electrode for solid oxide electrolysis cell (SOEC). La2NiO4+δ nickelate, LNO, was selected with respect to its mixed electronic and ionic conductivity and its good chemical stability. Complete single cells were built using screen printing of LNO and LaNi0.6Fe0.4O3 (LNF) layers on a standard hydrogen electrode supported half cell consisting of a porous NiO-YSZ layer, a dense 8YSZ electrolyte layer and a thin interlayer of GDC. The LNO cells polarization curves under various anodic flows of H2O/H2 (90/10) show excellent performances compared to the commercial LSCF (La0.6Sr0.4Co0.2Fe0.8O3-x) based cells. The steam conversion ratio SC increases from around 40% to 80% when the gas flow decreases from 36 to 12 NmL min-1 cm-2. With a degradation rate of 1.5% 1,000 hrs-1 after 500 hrs operating time (i =-0.5 A cm-2) at 800 °C, using a medium H2O/H2 (90/10) gas flow of 24 NmL min-1 cm-2 , LNO oxygen electrode shows higher durability than the state of the art LSCF oxygen electrode. Energy efficiency analysis confirms the dependency of the total efficiency with the current density and gas flow allowing us to suggest optimized conditions for reaching targets of commercial H2 production.< Réduire

Mots clés en anglais

lanthanum nickelate

oxygen electrode

Solid Oxide Electrolysis Cell

aging

energy efficiency

DOI

http://dx.doi.org/10.1002/fuce.202200013

Project ANR

optimisation Des Jonctions ANode/électrolyte et cathode/électrolyte des Générateurs d'hydrOgène par électrolyse de la vapeur d'eau - ANR-13-PRGE-0008

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026