Insights Into the Fuel Oxidation Mechanism of La0.75Sr0.25Cr0.5Mn0.5O3 − δ SOFC Anodes
作者： Michael van den Bossche , Roy Matthews , Arthur Lichtenberger , Steven McIntosh
DOI: 10.1149/1.3288374
关键词: Yttria-stabilized zirconia 、 Reference electrode 、 Polarization (electrochemistry) 、 Electrolyte 、 Electrode 、 Cathode 、 Materials science 、 Open-circuit voltage 、 Anode 、 Analytical chemistry
摘要: Solid oxide fuel cells (SOFCs) were fabricated by applying reproducible thin, dense La 0.75 Sr 0.25 Cr 0.5 Mn O 3-δ (LSCM) anode and 0.8 0.2 MnO (LSM) cathode films to yttria-stabilized zirconia (YSZ) electrolytes ultrasonic spray pyrolysis. A gold grid was applied the film lithography plating, enabling adequate electrical contact while maintaining an open surface area for reaction. Alignment of two electrode correct placement reference enabled separation impedance responses. Although open-circuit voltage (OCV) LSCM|YSZ|LSM cell at 700°C with humidified H 2 close that predicted Nernst equation, polarization resistance large (23 Ω · cm ). The addition Pd led only a small decrease in resistance, indicating oxygen ion conductivity limiting factor fuel. OCV CH 4 when inert gas (He) supplied anode. This increased 0.87 V upon LSCM surface. indicates bare is limited low activation activity.
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