Concluding Remarks

The 2 kw class stack was successfully manufactured and has been operated more than 800 hours. Based on the encouraging test results from this stack, our 2-phase program for construction of a 100 kW stack will be continued. Efforts will be made on the enlargement of components, the long term operation, the development of alternative materials, and so on.

Fig.3 showes the endurance test results of stack ST-17. The stack is now being operated for 800 hours with the performance of no decay rate, which also turned out a huge progress compared to previous the small stack because of A1 coating in the separator's wet-seal area.

Current Density(mA/cm2) Fig. 1. I-V Characteristics of the Slacks

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Cell Number

Fig. 2. Distribution of Cell Voltage at the load of 150mA/cm: in ST-1/.

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