Abstract
Degradation of LaCrO3-based Interconnect was evaluated by comparing the oxygen permeation flux for flat tube SOFC cell before and after long term operation (20,000 hours). Oxygen permeation flux was estimated based on the amount of water vapor, which was generated as a result of oxygen permeation from the hydrogen side to the air side. The estimated oxygen permeation flux for the SOFC cell before long term operation was found to be in the range of 0.02~0.06 mL cm−2 min−1 at 750 °C. For the cell after long term operation, the oxygen permeation flux was determined to be 0.049 mL cm−2 min−1, which was almost similar with that for the cell before long term operation. This suggested that degradation of LaCrO3-based Interconnect, i.e., increase in oxygen permeation, is quite small.
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