阳极
材料科学
氧化物
钙钛矿(结构)
丙烷
电化学
固体氧化物燃料电池
化学工程
电导率
氧气
碳氢化合物
氢
电极
无机化学
化学
有机化学
冶金
物理化学
工程类
作者
Sivaprakash Sengodan,Sihyuk Choi,Areum Jun,Tae Ho Shin,Young‐Wan Ju,Hu Young Jeong,Jeeyoung Shin,John T. S. Irvine,Guntae Kim
出处
期刊:Nature Materials
[Springer Nature]
日期:2014-12-22
卷期号:14 (2): 205-209
被引量:603
摘要
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.
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