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Effects of Anode Microstructure on the Performances of Cathode-Supported Micro-SOFCs

2009; Electrochemical Society; Volume: 12; Issue: 11 Linguagem: Inglês

10.1149/1.3204647

1944-8775

Toshiaki Yamaguchi, Sota Shimizu, Toshio Suzuki, Yoshinobu Fujishiro, Masanobu Awano,

Electronic and Structural Properties of Oxides

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 support and subsequent surface coating with a -doped bilayer electrolyte and 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.