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

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Author(s)

Sivaprakesh Sengodan, Siyuk Choi, Areum Jun, Tae Ho Shin, Young-Wan Ju, Hu Young Jeong, Jeeyoung Shin, John Thomas Sirr Irvine, Guntae Kim

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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 electrodes1. 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.

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Original languageEnglish
Pages (from-to)205-206
JournalNature Materials
Volume14
Early online date22 Dec 2014
DOIs
Publication statusPublished - Feb 2015

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