Thermodynamic assessment of the chemical stability of (La0.8Sr0.2)0.98CrxFe1−xO3±δ under oxygen transport membrane fabrication and operation conditions

Thermodynamic Investigation of La0.8Sr0.2MnO3±δ Cathode, including the Prediction of Defect Chemistry, Electrical Conductivity and Thermo-Mechanical Properties

“…# = 0.21 atm. Among all the species, CrO 3 and CrO 2 (OH) 2 seem to play the main role for Cr 6+ poisoning, similarly reported by Sabarou et al [91], which CrO 2 (OH) 2 activity significantly changes with humidity concentration, as previously claimed by Chen et al [100]. CrO 3 partial pressure does not alter with humidity change, but CrO 2 (OH) 2 partial pressure increases noticeably as !…”

“…causes cathode poisoning and long-term degradation of the fuel cell [91]. Crofer 22 steel group is mostly used as an interconnect in SOFCs [102,103].…”

“…Several experimental and computational investigations have been performed in all possible chemical reactions between cell component constituents (cationic species) and atmospheric gases, such as CO 2 , H 2 O and SO 2 [10,64,69,72,73,[85][86][87][88][89][90][91][92][93][94][95] and agreed that these reactions could be considered as one of the degradation acceleration factors. These reactions lead to the formation of secondary phases such as SrO/SrCO 3 [69,70,74,75,92], MnO x oxides [10,71,76], La 2 Zr 2 O 7 (LZO) and SrZrO 3 (SZO) [10,69,71,74], and La 2 O 3 and La(OH) 3 [68,71] in different concentration of ambient air contaminants.…”

Thermodynamic Investigation of Yttria-Stabilized Zirconia (YSZ) System

“…The thermodynamic databases based on the Gibbs energies are then constructed using experimental data and software programs [9,13]. The assessed thermodynamic database can be applied to predict the behavior and properties of different phases of a system at various conditions [14][15][16][17][18]55].…”