Abstract
Gd0.2Ce0.8O2-δ (GDC) interlayers, positioned between La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) anode (air electrode) and yttria-stabilized zirconia (Y0.16Zr0.84O2-d, YSZ) electrolyte of solid oxide electrolysis cells (SOECs) to prevent mutual reaction, are compared that used either thin-film deposition method to produce dense layers or screen-printing to produce porous layers. Two cells with 2μm-thick GDC layers are sputter deposited, one annealed at 1300°C and the other at 1100°C. During SOEC operation with an anodic current density of −800mAcm−2 in 80% H2O+20% H2 at 800°C, the two cells show similar Ohmic and polarization resistances at the beginning of measurement, but the cell annealed at 1300°C is more stable after 100h than the film annealed at 1100°C due to the stability of pinhole free nature of GDC layer. In a third cell with ~11μm-thick screen-printed GDC layer, GDC is porous and therefore the cell degrades more rapidly during SOEC operation for 100h than does a cell with ~2μm-thick, pin-hole free GDC film. The good stability of the cell with dense, pin-hole free GDC thin film is attributed to its blocking of Sr.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
