Lanthanum oxide-coated stainless steel for bipolar plates in solid oxide fuel cells (SOFCs)

Highly Dense Mn-Co Spinel Coating for Protection of Metallic Interconnect of Solid Oxide Fuel Cells

“…9,17,18 The key requirements for a protective coating include dense structure, high electronic conductivity, thermal, mechanical and chemical compatibility with the adjacent components and low diffusion coefficients of Cr and O. Among coating mate-rials, such as reactive element oxides, 11,[19][20][21][22][23][24] 72,73 Although the feasibility of these techniques has been substantiated, individual processes exhibit their characteristic drawbacks along with their advantages. For example, electroplating is suitable for uniformly applying thin film over a complex configuration, but the large negative reduction potential of manganese makes the control of the spinel composition extremely difficult.…”

Effect of Sr and Ca dopants on oxidation and electrical properties of lanthanum chromite-coated AISI 430 stainless steel for solid oxide fuel cell interconnect application

“…The interconnect has two main roles: transmitting the generated electricity to the external circuit and separating the fuel and oxygen paths in the stack [6,9]. Interconnect material must satisfy some criteria, including good electrical and thermal conductivity, high density without open porosity, high creep resistance, chemical and physical stability in both oxidizing and reducing atmospheres and compatibility of its thermal expansion coefficient (TEC) with that of the other components of the cell to perform at operating temperature (between 600 1C and 800 1C) [9][10][11].…”

“…High growth rate of the chromia oxide scale during longterm oxidation, which may result in spallation of the oxide scale due to its TEC mismatch with that of FSS [10,17,19].…”

“…This protective layer must have close TEC match with the substrate and must decrease Cr migration to the cathode [9,11]. Perovskite-type oxide coatings with the general formula of ABO 3 (such as LaCrO 3 , LaMnO 3 , LaCoO 3 and LaFeO 3 ), where A is a rare earth cation (e.g., La) and B is usually a transition metal (e.g., Cr), are among the most promising protective coatings [10,11,15,26]. Among them, lanthanum chromite coating shows superior properties such as good stability in oxidizing and reducing atmospheres and desirable surface adhesion in SOFC operating temperature range from 650 1C to 800 1C [14,15,[26][27][28].…”

Charge compensation and magnetic properties in Sr and Cu doped La-Fe perovskites

“…together with chemical and thermal stability. Doped lanthanum ferrites are widely studied for use in catalysis [1][2][3][4], as cathode materials for solid oxide fuel cells (SOFCs) [5][6][7][8] and in chemical sensors applications [9][10]. Dann et al [11] studied the La 1-x Sr x FeO 3-w system using neutron powder diffraction measurements and Mössbauer spectroscopy.…”