abstract
Results are presented of studying electrochemical properties of perovskite-like solid solutions (La0.5 + x Sr0.5 - x )(1 - y) Mn0.5Ti0.5O3 - delta (x = 0-0.25, y = 0-0.03) synthesized using the citrate technique and studied as oxide anodic materials for solid oxide fuel cells (SOFC). X-ray diffraction (XRD) analysis is used to establish that the materials are stable in a wide range of oxygen chemical potential, stable in the presence of 5 ppm H2S in the range of intermediate temperatures, and also chemically compatible with the solid electrolyte of La0.8Sr0.2Ga0.8Mg0.15Co0.05O3 - delta (LSGMC). It is shown that transition to a reducing atmosphere results in a decrease in electron conductivity that produced a significant effect on the electrochemical activity of porous electrodes. Model cells of planar SOFC on a supporting solid-electrolyte membrane (LSGMC) with anodes based on (La0.6Sr0.4)(0.97)Mn0.5Ti0.5O3 - delta and (La0.75Sr0.25)(0.97)Mn0.5Ti0.5O3 - delta and a cathode of Sm0.5Sr0.5CoO3 - delta are manufactured and tested using the voltammetry technique.
keywords
ELECTRODE; SOFCS
subject category
Electrochemistry
authors
Ivanov, AI; Agarkov, DA; Burmistrov, IN; Kudrenko, EA; Bredikhin, SI; Kharton, VV
our authors
Vladislav Kharton
Invited Principal ResearcherGroups
acknowledgements
The work was financially supported by the Ministry of Education and Science of the Russian Federation (Contracts 02.740.11.5214 and 14.V25.31.0018).