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La<sub>0.6</sub>Sr<sub>0.4</sub>CoO<sub>3-δ</sub> Thin Films Prepared by Pulsed Laser Deposition as Cathodes for Micro-Solid Oxide Fuel Cells
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2012
Year
Materials ScienceOxide HeterostructuresChemical EngineeringEngineeringElectrode-electrolyte InterfaceOxide ElectronicsLsc Thin FilmsApplied PhysicsLanthanum-strontium-cobalt OxideThin Film Process TechnologyLaser-assisted DepositionThin FilmsPulsed Laser DepositionThin Film ProcessingSurvival Rate
Lanthanum-strontium-cobalt oxide (LSC) thin films fabricated by pulsed laser deposition (PLD) can be used as electrodes for micro-solid oxide fuel cells (micro-SOFCs) in the intermediate temperature range of 450-550 °C. The LSC thin films deposited under a high oxygen chamber pressure are nanocrystalline after thermal treatment at 550 °C and have a nanoporous microstructure. The buckling pattern of the free-standing yttria-stabilised-zirconia (YSZ) membrane influences the survival rate of the free-standing LSC|YSZ|LSC cells. Electrochemical impedance spectroscopy is used to investigate the properties of the LSC/YSZ interface in free-standing quasi-symmetrical LSC|YSZ|LSC membranes. LSC electrodes with a thickness of ~150 nm had an area specific resistance (ASR) of 3.7 Ωcm2 at 550 °C.