Abstract
AbstractThe objective of this study was using different morphology of La0.8Sr0.2Co0.2Fe0.8O3‐δ (LSCF) cathode to reduce the polarization of solid oxide fuel cell. Three kinds of LSCF powders with different particle size were used to investigate the affection on the electrochemical property of solid oxide fuel cell (SOFC). XRD and TEM results confirmed that the grain size of LSCF powders decreased with the grinding ball size decreased. Conductivity of LSCF electrodes increased with increasing temperature that showed the characteristics of p‐type conductor. At high temperature, there aremore oxygen vacancies in smaller particle size LSCF, that will increase the energy gap of charge carrier transfer between the B‐site cations and oxygen ions. AC impedance analysis revealed that smaller particle size LSCF had lower polarization resistance and the total polarization resistance was only 0.92 Ωcm2 at 800 °C. However, sintering shrinkage of smaller particle size LSCF was too large that attributed the poor adhesion between cathode and electrolyte. At 800 °C, the power density based on large particle sized LSCF was 65 mW/cm2, which was higher than that of the cell based on small particle sized LSCF.
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.
