Abstract
The effect of anode microstructure on the electrochemical performance of cathode-supported micro solid oxide fuel cells (SOFCs) was evaluated using current-voltage and ac impedance measurements. Small-scale cells were fabricated by the extrusion of a microtubular (La 0.8 Sr 0.2 ) 0.97 MnO 3 support and subsequent surface coating with a Ce 0.9 Gd 0.1 O 1.95 /Sc 2 O 3 -doped ZrO 2 bilayer electrolyte and NiO-Ce 0.9 Gd 0.1 O 1.95 anode layers. Impedance analysis and scanning electron microscopy observations indicate that an anode layer with coarse NiO particles has a higher porosity and electrode activity than that with fine NiO particles. The SOFC with coarse NiO particles generated more than twice the power density of that with fine NiO particles.
Published Version
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