Oxygen tracer diffusion in undoped lanthanum manganites

Simulation of sintering kinetics and microstructure evolution of composite solid oxide fuel cells electrodes

“…The scaling results of kMCS are consistent with the diffusion coefficient measurement for LSM proposed by Berenov et al [32]. As discussed above, the duration of one kMCS is in inverse proportion to the surface diffusion coefficient.…”

“…, while the surface diffusion coefficient is of 10 À9 cm 2 s À1 at 1100 C as extrapolated with the oxygen tracer diffusion data [32]. It is also noted that the diffusion of LSM during sintering occurs by the transport with the perovskite maintaining its stoichiometry, in other words, by transport of lattice molecules.…”

Effect of Cathode Microstructure on the Cathode Polarization in the Sintered Strontium-Doped Lanthanum Manganite/Yttria Stabilized Zirconia Solid Oxide Fuel Cells

“…shows that the charge transfer resistance increases only by one time as TPB length decreases gradually. This phenomenon was previous observed by other studies of interfacial resistance around the sintering condition of the 1200C [95,[114][115][116]. Slight pore growth leads to the slight decrease of the pore surface area.…”

Atomic-Scale Insight into LaFeO3 Perovskite: Defect Nanoclusters and Ion Migration

“…However, it has been shown that La deficiency in the related LaMnO 3 system has no effect on oxygen diffusion compared to the cation stoichiometric compound. 44 This was attributed to the fact that the formation of negatively charged La vacancies, V La /// , is compensated by the oxidation of Mn 3+ ions rather than the formation of oxygen vacancies, V O •• . It has also been shown that A-site deficiency plays an important role in enhancing the performance of LSCF cathode materials; 43 therefore, the formation of holes may be the compensating mechanism for La-deficiency in LaFeO 3 .…”