100

* SUckC

Figure 4 Performance Curves of Two-Cell Stacks

Figure 5 shows voltage/current density and power curves of a five-cell stack (footprint area of 100 cm2) obtained at 800°C. This stack produced peak power of about 270 W at 800°C and 185 W at 700°C, corresponding to power densities of 600 mW/cm2 and 410 mW/cm2, respectively. This is the best stack performance reported to date at reduced temperatures. Although the design has not been optimized, stack power densities achieved are exceeding or close to the goals of 1 kW/kg and 1 kW/L (Figure 6).

100-cm2 Footprint

100-cm2 Footprint

Figure 5 Performance of Five-Cell Stack

Goal Power Density Goa| Power Density

Achieved to Date Achieved to Date at 800°C at800°C

Figure 6 Stack Power Densities

Goal Power Density Goa| Power Density

Achieved to Date Achieved to Date at 800°C at800°C

Figure 6 Stack Power Densities

ACKNOWLEDGEMENTS: This work is supported in part by Gas Research Institute (GRI) under Contract 5092-260-2568 and Defense Advanced Research Projects Agency (DARPA) under Contract MDA972-94-C-0029.

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