CaV0.5Mo0.5x - x Ti (x) O3-delta as a Promising Anode Material for Solid-Oxide Fuel Cells with LSGM Electrolyte

摘要

CaV0.5Mo0.5 - x Ti (x) O3 - delta samples with the perovskite structure were studied as a promising anode material for fuel cells with electrolyte based on substituted lanthanum gallate La0.88Sr0.12Ga0.82Mg0.18O2.85 (LSGM). According to X-ray diffraction data, the solid-solution homogeneity region lies from N... = 0 to N... = 0.25. It is shown that CaV0.5Mo0.25Ti0.25O3 - delta is compatible with the LSGM-based electrolytes as regards both its chemistry and the coefficient of thermal expansion. Substitution of titanium leads to a decrease in the total conductivity but extends the p(O-2) range of phase stability of this material. It is demonstrated that in its composite with LSGM this material becomes more resistant to oxidation.