Abstract
Oxygen-excess-type lanthanum silicate (LSO) is a promising electrolyte material for intermediate-temperature SOFCs because of its high ion conductivity and low activation energy for conduction. In this study, the anode-supported solid electrolyte cell based on Mg-doped LSO, La9.8(Si5.7Mg0.3)O26.4(MDLS), was developed, and its electrical properties and fuel cell performances were evaluated. The MDLS film was applied on top of the Ni-MDLS substrate by spin coating using nano-sized MDLS printable paste. The half cell obtained was then coated with (La0.6Sr0.4)(Co1-y Fe y )O3-δ cathode material. The open circuit voltage of the cell was about 1.1 V, indicating that MDLS is a pure ionic conductor, and good gas-tight electrolyte was obtained. The ohmic and polarization resistances of the cell at 873 K were 3.2 and 3.1 Ω cm2, respectively. Both were able to be reduced with optimizing preparation conditions of MDLS, and inserting an interlayer between cathode and MDLS. As a result, the cell performance was largely improved, and the cell showed the power density of 855 and 97 mW cm-2 at 1073 and 873 K, respectively. It is expected that high performance intermediate-temperature SOFCs will be constructed using LSO-based electrolyte.
Sign-in/Register to access full text options 
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.
