Journal
ELECTROCHEMICAL AND SOLID STATE LETTERS
Volume 12, Issue 11, Pages B151-B153Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.3204647
Keywords
cathodes; cerium compounds; crystal microstructure; electric impedance measurement; electrolytes; lanthanum compounds; nickel compounds; scandium compounds; scanning electron microscopy; solid oxide fuel cells; strontium compounds; zirconium compounds
Funding
- New Energy and Industrial Technology Development Organization (NEDO)
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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.
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