Various Types of Applications with Double Perovskite Structure

Wednesday, 27 May 2015
Salon C (Hilton Chicago)
A. Jun, J. Kim (Department of Energy Engineering, UNIST, South Korea), J. Shin (Dong-Eui University, South Korea), and G. Kim (Department of Energy Engineering, UNIST, South Korea)
Perovskite oxides with variable oxygen non-stoichiometry play a prominent role in many fields, including fuel cells, catalysis and gas storage. One interesting class of materials for solid oxide fuel cells (SOFCs) are cation ordered layered perovskite oxides due to their mixed ionic and electronic conductivity and fast oxygen kinetics. Even though progress has been made in cathode materials to lower the cathodic polarization, still it is also important for fuel cell technology to achieve highly efficient anode that realize long term stability with enhanced tolerance to carbon buildup (coking) and sulfur contamination (poisoning) from hydrocarbon fuels. Here, we report identification of redox-stable cation layered perovskite anode, with superior electrochemical performance in both hydrogen and hydrocarbons. Further, double perovskite materials will have immediate and profound implications for a new generation of SOFCs, proton conducting SOFC, oxygen separation membranes, electrolyzers, as well as other processes involving oxygen/electron transport.