Abstract
Engineering of A-site deficiency in perovskites can be critical for designing new materials with required functional properties. In this article, A-site deficient Sr2-xFe1.4Ni0.1Mo0.5O6-δ (x=0-0.1, Sr2-xFNM) perovskites have been synthesized and characterized as anode materials for solid oxide fuel cells. X-ray photoelectron spectroscopy data indicate that Sr deficiency changes valence states of B-site cations. The introduction of A-site deficiency has shown to improve the chemical stability of the as-prepared materials under reducing conditions. With increasing of Sr deficiency, the conductivity in 5% H2/Ar increases markedly, reaching a peak value of 26.6Scm−1 at x=0.05. While further increasing of x reduces the conductivity by affecting the mobility of electronic charge carriers. The La0.9Sr0.1Ga0.8Mg0.2O3 electrolyte-supported cell with La0.6Sr0.4Fe0.8Co0.2O3 cathode and Sr1.95Fe1.4Ni0.1Mo0.5O6-δ anode demonstrates a maximum power density of 606mWcm−2 at 800°C operating in H2. Such designed A-site deficiency perovskite has the potential to be applied as SOFC anode materials.
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.
