Abstract
Abstract The electrochemical performances of the solid oxide fuel cells (SOFC) fabricated with Ln 0.6 Sr 0.4 Co 1− y Fe y O 3− δ (Ln = La, Nd; y = 0, 0.5) perovskite cathodes, thin yttria-stabilized zirconia (YSZ) electrolytes, and YSZ–Ni anodes by tape casting, co-firing, and screen printing are evaluated at 600–800 °C. Peak power densities of ∼550 mW cm −2 are achieved at 800 °C with a La 0.6 Sr 0.4 CoO 3− δ (LSC) cathode that is known to have high electrical conductivity. Substitution of La by Nd (Nd 0.6 Sr 0.4 CoO 3− δ ) to reduce the thermal expansion coefficient (TEC) results in only a slight decrease in power density despite a lower electrical conductivity. Conversely, substitution of Fe for Co (La 0.6 Sr 0.4 Co 0.5 Fe 0.5 O 3− δ or Nd 0.6 Sr 0.4 Co 0.5 Fe 0.5 O 3− δ ) to reduce the TEC further reduces the cell performance greatly due to a significant decrease in electrical conductivity. However, infiltration of the Fe-substituted cathodes with Ag to increase the electrical conductivity increases the cell performance while preserving the low TEC.
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.
