Abstract
The composite particles were prepared by one-step mechanical processing of the starting raw powders of La0.8Sr0.2MnO3 （LSM） and scandia stabilized zirconia （ScSZ） fine particles. In this paper, volume percentage of ScSZ in composite particles was set as 50 vol％ and 62 vol％, respectively. The SOFC cathodes using the composite particles were prepared by sintering at 1200℃. Sintering time was selected as 2h and 3h. As results of electrochemical examinations by AC impedance measurements, the increased content of ScSZ （62 vol％） and the shorter sintering time （2h） contributed to improving the polarization resistance （Rp） of cathodes. Three factors such as conductivity of oxygen ion, formation of triple phase boundaries and gas diffusivity were discussed for the improvement of Rp using the Bode plots which showed the relationship between the absolute value of imaginary part of impedance and the frequency.
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 callMore From: Journal of the Society of Powder Technology, Japan
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.
