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Durability of solid oxide electrolysis stack under dynamic load cycling for syngas production

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Journal 01 Mar 2020Embargo end date: 01 Jan 2020 Denmark Publisher:Elsevier BVJournal:Journal of Power Sources, volume 451, page 227,781 (issn: 0378-7753,

Authors: Megha Rao; Xiufu Sun; Anke Hagen;

doi: 10.1016/j.jpowsour.2020.227781 , 10.48550/arxiv.2002.02169

arXiv: 2002.02169 , http://arxiv.org/abs/2002.02169

Durability of solid oxide electrolysis stack under dynamic load cycling for syngas production

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Abstract

A 6-cell solid oxide electrolysis stack was tested under H2O + CO2 co-electrolysis conditions. The cells used in the stack consisted of a nickel-yttria stabilized zirconia (Ni-YSZ) fuel electrode, YSZ electrolyte and lanthanum strontium cobaltite-gadolinium doped ceria (LSC-GDC) composite oxygen electrode. The aim of this study was to investigate the stack durability when operated under dynamic load conditions simulating a wind energy powered SOEC stack for synthesis gas production. The degradation of the stack was observed to be less than 1%/1000 h in terms of area specific resistance during the 1000 hours operation. Detailed electrochemical analysis revealed a constant ohmic resistance, indicating intact contact in the stack. Only minor degradation was observed, mainly due to the fuel electrode process. The overall stack voltage degradation rate was 0.8%/1000 h.

Country

Denmark

Related Organizations

Technical University of Denmark
Denmark

Keywords

Chemical Physics (physics.chem-ph), Syngas production, FOS: Physical sciences, Durability, Dynamic load testing, Physics - Chemical Physics, Solid oxide electrolysis stac, Electrochemical impedance spectroscop

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