Technologies based on the use of oxygen-ionic and mixed ionic-electronic conductors provide important economic and environmental advantages with respect to traditional industrial processes. Key applications of these materials include solid oxide fuel cells (SOFCs) for electric power generation, ceramic membranes for high-purity gas separation and conversion of natural gas and biogas, high-temperature electrolyzers for hydrogen production and carbon dioxide conversion, and various electrochemical sensors.

The monograph presents main equations, definitions and theoretical relationships necessary for the analysis of transport and electrochemical processes in oxygen ion conducting materials and devices on their basis, brief description of key experimental methods used, comparative analysis of the oxygen ionic conductivity, electronic transport and other physicochemical properties, survey of the interfacial reaction mechanisms, electrode materials, processing methods, and theoretical and empirical concepts.