(b) The 34000-hour-operation MCFC

The performances with time was shown in Figure 2. This cell experienced the interruption of C02 twice. Though the first interruption did not influence the cell performance, the, second one reduced the cell performance. It has not been clarified that the C02 interruption brought these effects and different results with the comparison of 40000-hour-operation MCFC.

The OCV was almost constant until 25000 hours. After then it slightly decreased. The gaschromatography result indicated that gas leakage was not found in operation. The reduction of OCV also was due to the short circuit.

Addition of carbonalc

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