Primary Study on Solid Oxide Fuel Cells

A trial tubular SOFC system was fabricated. The electrical performance of this SOFC was evaluated at temperatures of 500 to 950℃. H2 and CH4 were used as the fuels and air as the oxidant gas. The internal resistance, output current and output power of this SOFC were measured. When H2 and CH4 were imported into the SOFC system at 950℃ the open circuit voltages were 0.98V and 1.05V, maximum output current densities were 19.6mA/cm2 and 16.4mA/cm2, the maximum output power was 30.0mW and 24.4mW, respectively. The endurance test was conducted over 145h, but this SOFC system showed no significant degradation.