Ba-substituted LSCM anodes for solid oxide fuel cells

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

“…One has to remember that Y0.9Zr0.1MnO3 is present in P63/mmc structure over the whole temperature range, while YMnO3 crystallizes as P63cm at low T and becomes P63/mmc at much higher T. In the latter space group, the MnO5 bipyramids are not tilted, while in the former an undulation is present. By analogy of what happens for some perovskite-like compounds, in which the non-distorted structures raise the electrical conductivity values67 , the undulation present in the P63cm SG could hinder the movement of carriers in our case. However, as already pointed out, the Zr-doped compound adopts the same P63cm structure at higher temperatures contradicting the previous hypothesis.…”

“…Thus, it is possible to think that in the LT regime, the presence of Mn 3+ -Mn 4+ charge carriers is responsible for the electrical conduction of both materials. In fact, it could also explain why the LT activation energy of the Zrdoped compound is lower than that of pure-YMnO3, since the former can absorb more excess oxygen and thus a higher number of carriers participates in the conduction67 .The electrical conductivity process in the high-temperature range is more difficult to understand since the compounds lose their excess oxygen, and Mn is essentially Mn 3+ , in both compounds. Then, density of Mn 4+ carriers (holes) strongly decreases in this range.…”

Recent Advances in Novel Nanostructuring Methods of Perovskite Electrocatalysts for Energy‐Related Applications

“…Perovskite oxides are known to have flexible composition and structure, low production cost, excellent mechanical and thermal stability, as well as good physical compatibility with electrolyte materials, making them ideally suitable to be used as the anode in SOFCs. [223][224][225] However, the bulk perovskite anode always displays low activity for the fuel electro-oxidation. One viable strategy to enhance the activity of perovskite anode is to reduce the particle size to the nanometric range or to build a mesoporous microstructure or nanostructure.…”

Effects of Ti doping on the electrochemical performance of (La0.75Sr0.25)(Mn0.5Cr0.5)O3-δ anode for solid oxide fuel cells

“…However, the location of metal atoms is critical since the catalytic metal must be located near the triple phase boundary in order to promote the oxidation of oxygen anions coming from the electrolyte. Simple metal coating would not be optimized as LSCMs are generally low in ionic conductivity [36]. Doping with Ti has a significant effect on the impedance as shown in Fig.…”