title: Layered oxygen-deficient double perovskite as an efficient and stable anode for direct hydrocarbon solid oxide fuel cells.
abstract: Different layered perovskite-related oxides are known to exhibit important electronic, magnetic and electrochemical properties. Owing to their excellent mixed-ionic and electronic conductivity and fast oxygen kinetics, cation layered double perovskite oxides such as PrBaCo2O5 in particular have exhibited excellent properties as solid oxide fuel cell oxygen electrodes. Here, we show for the first time that related layered materials can be used as high-performance fuel electrodes. Good redox stability with tolerance to coking and sulphur contamination from hydrocarbon fuels is demonstrated for the layered perovskite anode PrBaMn2O5+δ (PBMO). The PBMO anode is fabricated by in situ annealing of Pr0.5Ba0.5MnO3-δ in fuel conditions and actual fuel cell operation is demonstrated. At 800 °C, layered PBMO shows high electrical conductivity of 8.16 S cm(-1) in 5% H2 and demonstrates peak power densities of 1.7 and 1.3 W cm(-2) at 850 °C using humidified hydrogen and propane fuels, respectively.
authors.affiliation: Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Korea.
authors.forename: Sivaprakash
authors.initials: S
authors.lastname: Sengodan
authors.affiliation: Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Korea.
authors.forename: Sihyuk
authors.initials: S
authors.lastname: Choi
authors.affiliation: Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Korea.
authors.forename: Areum
authors.initials: A
authors.lastname: Jun
authors.affiliation: School of Chemistry, University of St Andrews, St Andrews KY16 9ST, UK.
authors.forename: Tae Ho
authors.initials: TH
authors.lastname: Shin
authors.affiliation: Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Korea.
authors.forename: Young-Wan
authors.initials: YW
authors.lastname: Ju
authors.affiliation: UNIST Central Research Facilities, UNIST, Ulsan, 689-798, Korea.
authors.forename: Hu Young
authors.initials: HY
authors.lastname: Jeong
authors.affiliation: Department of Mechanical Engineering, Dong-Eui University, Busan 614-714, Korea.
authors.forename: Jeeyoung
authors.initials: J
authors.lastname: Shin
authors.affiliation: School of Chemistry, University of St Andrews, St Andrews KY16 9ST, UK.
authors.forename: John T S
authors.initials: JT
authors.lastname: Irvine
authors.affiliation: Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Korea.
authors.forename: Guntae
authors.initials: G
authors.lastname: Kim