A HIGH-PERFORMANCE ELECTRODE FOR MEDIUM-TEMPERATURE SOFC: MIXED CONDUCTING CERIA-BASED ANODE WITH HIGHLY-DISPERSED Ni ELECTROCATALYSTS

摘要

We have developed a high-performance anode for medium-temperature SOFCs. Mixed conducting samaria-doped ceria (SDC) particles were employed in combination with highly dispersed metal electrocatalysts on their surfaces. Fairly small amounts of Ni nanoparticles (6 to 8 vol%) were found to enhance the anode performance significantly at 700° to 800℃ in humidified H_2. It is shown that the dispersion of nm-sized Ni increased the reaction area (contact portion with SDC) more effectively than μm-sized Ni in the cermet-type anode.