Nanocomposite Electrodes Fabricated by a Particle-Solution Spraying Process for Low-Temperature SOFCs

摘要: We report a particle-solution spraying process for fabrication of porous electrodes solid oxide fuel cells (SOFCs). Gd-doped ceria (GDC) particles with composition Gd0.1Ce0.9O2 were suspended in ethanol containing nitrates Sm, Sr, and Co molar ratio 1:1:2 to form Sm0.5Sr0.5CoO3 (SSC) after combustion air. The SSC solution carrying GDC was pumped through an atomizer the resulting mist combusted, depositing composite layer consisting on electrolyte supported by Ni−GDC anode. Typically, SSC−GDC cathodes consist large grains (1−2 μm) embedded nanosized phases SSC. highly open structure significantly facilitates gas transport while extremely surface area dramatically enhances electrode kinetics. As result, polarization resistances oxygen reduction GDC−SSC/GDC interface are low, varying from 1.06 Ωcm2 at 450 °C 0.45 500 °C. activation energy elec...