Abstract
In solid oxide fuel cells (SOFC), strontium zirconate (SrZrO3) insulating phase formation between Sr-containing cathode and yttria-stabilized zirconia (YSZ) electrolyte was a long-standing unsolved problem. Though a bilayer strategy with gadolinium doped ceria (GDC), or the use of samarium doped ceria (SDC) as a protective layer have been reported to improve stability and performance, the effectiveness of these processes at preventing secondary phase formation is still open to debate. In this study, focusing on Sc and Ce co-doped ZrO2 (ScCeSZ), we found that nanometer-scale Sc-segregation layers are present at co-sintered GDC/ScCeSZ interfaces. Utilizing atomic-column resolved scanning transmission electron microscopy (STEM), energy-dispersive X-ray spectroscopy (EDS), and electrochemical measurements, we successfully demonstrate that SOFC cells consisting of Sc-segregated interfaces show a remarkable increment of long-term durability.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.