Research and Development of Planar type SOFCS
1996 Volume 21 Issue 2 Pages 18-24
Details
1996 Volume 21 Issue 2 Pages 18-24
A 2 kW class combined cell stacked module (182 cm2 × 4× 17) was examined. An output power of 2.47 kW and output power density of 0.20 W /cm2 were obtained at the current density of 0.3 A/cm2.
As concerning basic researches for improving thermal cycle characteristics, we investigated two materials, sealing materials and separator materials to improve the thermal cycle characteristics. A silica/alumina-based sealing material was used for the gas seal, and deterioration of the V-I characteristics was quite small after 12 thermal cycles. A heat-resisting ferritic alloy was tested to use as a separator in order to bring the thermal expansion coefficient of the separator
closer to that of the electrolyte. High performance was obtained for 2000 hours at 900℃ in an endurance test and deterioration of the cell perlormance was quite small after a thermal cycle.
On the other hand, it was calculated that a life of 40,000h can be achieved by suppressing chromium diffusion to a cathode from an alloy separator by a cathode second layer.
