Synthesis and preliminary study of pure and Zr-doped YMnO3 compounds as Solid Oxide Fuel Cells electrode

Pure and Zr-doped YMnO3+δas a YSZ-compatible SOFC cathode: a combined computational and experimental approach

“…Transmission Electron Microscopy, in diffraction mode, was also used to characterize those samples, since this technique is well known to be very sensitive to oxygen stoichiometry deviations through the appearance or disappearance of superstructure reflections (see for instance 56 It is worth noting that additional oxygen in the P63/mmc SG was clearly evidenced with the sample prepared by Pechini technique, and not by solid state synthesis, probably evidencing the importance of the powder microstructure (grain size in particular) on the kinetics of oxygen absorption, making it difficult to observe in our first experiments 35 . Cooling rate and, in this case, characteristic diffusion length often determines at what temperature equilibration with the atmosphere is no longer retained and the oxygen content effectively 'freezes in'.…”

High-Entropy Hexagonal Manganites for Fast Oxygen Absorption and Release

“…This implies a smaller available OSC when using short dwell times or fast heating and cooling rates, ,− which are both necessary for efficient O 2 gas production by cyclic processes like CLAS . Both the OSC and oxidation kinetics of RMnO 3 are known to improve with larger R 3+ cations, either as the sole R-site cation or as a substituted element in YMnO 3 ,,,− or through aliovalent doping, e.g., with Zr 4+ on the R-site or Ti 4+ on the Mn 3+ site. ,,− …”

Understanding the transport properties of perovskite compounds as a function of temperature, frequency and DC-bias voltage using experimental measurements and appropriate theoretical models

“…1–7 Owing to the rich findings of perovskite compounds, several groups of researchers have deeply examined the possibility of the use of such systems for different technological applications (oxide fuel cells, infrared detectors, magnetic sensors, capacitors, and magnetic refrigerants). 8–11 These compounds are equally invested in biology and medicine. 12,13 Bok Ma et al 14 have demonstrated a new strategy that enables the effective design of Li-conducting mixed ionic–electronic conductors (MIECs) and reversible Li–air batteries.…”