Oxygen transfer processes in (La,Sr)MnO3/Y2O3-stabilized ZrO2 cathodes: an impedance spectroscopy study

Room temperature mechanosynthesis of the La1−Sr MnO3± (0≤x≤1) system and microstructural study

“…Solid solutions based on lanthanum strontium manganites La 1-x Sr x MnO 3±δ (LSM) are promising materials for oxygen cathodic electrodes [10][11][12][13][14][15][16][17][18][19] and it is well known that its final properties depend on the La/Sr ratio as well as on the oxygen stoichiometry [20,21]. However, the cathode microstructure is also a critical factor in determining the activity and is controlled by several synthesis variables.…”

“…This LSM system has been synthesized by several techniques [11][12][13][14][15][16][17][18][19][20][21][22][23]; however there are very few works [24][25][26][27][28][29] The aim of this study is to synthesize by a very simple method (one hour using a planetary ball milling equipment at room temperature) eight phases belonging to the system La 1-x Sr x MnO 3±δ (x=0, 0.25, 0.5, 0.75, 0.80, 085, 0.90, and 1) and analyze the structure before and after annealing at 1100º C in static air. The evaluation of how the x value affects the final structure and symmetry, and how far-in terms of the x value-the solid solution is kept were considered.…”

Gallium-doped lanthanum germanates as electrolyte material of solid oxide fuel cells

“…The highest frequency intercept of the impedance spectra corresponds to the total ohmic resistance of the cell (R 0 ), the lowest frequency intercept stands for the overall resistance of the cell and the distance between the two intercepts represents the total interfacial polarization resistance (R P ). 32) As shown in Fig. 8 , respectively, at 850, 800, 750, 700 and 650°C, respectively.…”

Highly stable microtubular cells for portable solid oxide fuel cell applications

“…As the HF and MF processes remain almost unaltered against both pH2 (hydrogen partial pressure) and flux of hydrogen, it is reasonable to assume that both contributions correspond to the LSM-YSZ oxygen electrode. Based on the extensive literature, the HF contribution was assigned to resistances at the interface between the electrolyte and the electrode, and the MF contribution was assigned to charge transfer and dissociative oxygen adsorption [30,31,32].…”