Layered oxygen-deficient double perovskite as an efficient and stable anode for direct hydrocarbon solid oxide fuel cells

Layered double perovskites are promising as solid oxide fuel cell electrodes because of favourable transport properties. Related layered materials are now used as high-performance anodes that exhibit redox stability when exposed to hydrocarbon fuels. Different layered perovskite-related oxides are k...

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Bibliographic Details
Published in:Nature materials 2015-02, Vol.14 (2), p.205-209
Main Authors: Sengodan, Sivaprakash, Choi, Sihyuk, Jun, Areum, Shin, Tae Ho, Ju, Young-Wan, Jeong, Hu Young, Shin, Jeeyoung, Irvine, John T. S., Kim, Guntae
Format: Article
Language:English
Subjects:
639/301/299/161/893
Anodes
Biomaterials
Carbon
Cations
Condensed Matter Physics
Density
Electrochemistry
Electrodes
Electronics
Fuel cells
Fuel technology
Fuels
Hydrocarbons
letter
Materials Science
Nanotechnology
Optical and Electronic Materials
Oxidation
Oxides
Oxygen
Perovskites
Poisoning
Solid oxide fuel cells
Sulfur
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Summary:Layered double perovskites are promising as solid oxide fuel cell electrodes because of favourable transport properties. Related layered materials are now used as high-performance anodes that exhibit redox stability when exposed to hydrocarbon fuels. 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 PrBaCo 2 O 5 in particular have exhibited excellent properties as solid oxide fuel cell oxygen electrodes 1 . 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 PrBaMn 2 O 5+ δ (PBMO). The PBMO anode is fabricated by in situ annealing of Pr 0.5 Ba 0.5 MnO 3− 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% H 2 and demonstrates peak power densities of 1.7 and 1.3 W cm −2 at 850 °C using humidified hydrogen and propane fuels, respectively.
ISSN:1476-1122
1476-4660
DOI:10.1038/nmat4166