Department of Civil, Chemical and Environmental Engineering (DICCA), University of Genoa , Via Opera Pia 15, Genoa 16145, Italy
Davide Clematis
Department of Civil, Chemical and Environmental Engineering (DICCA), University of Genoa , Via Opera Pia 15, Genoa 16145, Italy
Barbara Bosio
Department of Civil, Chemical and Environmental Engineering (DICCA), University of Genoa , Via Opera Pia 15, Genoa 16145, Italy
Antonio Barbucci
Department of Civil, Chemical and Environmental Engineering (DICCA), University of Genoa , Via Opera Pia 15, Genoa 16145, Italy; Institute of Condensed Matter Chemistry and Technology for Energy, National Research Council (CNR-ICMATE) , Via De Marini 6, 16149 Genova, Italy
The carbon-free energy transition requires the spread of advanced technologies based on high-performing materials. In this framework and particularly referring to electrochemical energy converting systems, double perovskites are arousing more and more interest as mixed ionic electronic conductors with flexible manufacturing, appropriate tailoring for many tasks and high chemical stability. Among their possible applications, they form excellent oxygen electrodes in solid oxide cell technology used as fuel cells, steam/CO _2 electrolysis cells and electrochemical air separation units. In view of the encouraging results shown by SmBa _1− _x Ca _x Co _2 O _5+ _δ co-doped double perovskite, this research work aims at a detailed analysis of SmBa _0.8 Ca _0.2 Co _2 O _5+ _δ performance and the identification of kinetic paths for oxygen reduction and oxidation reactions. The electrochemical characterization was performed over a wide range of operation conditions to evaluate the electrode reversible behaviour and the interplay of the recognized phenomena governing the overall electrode kinetics.
