抄録
This research was aimed to clarify the cause of the performance deterioration that occurred in a continuous operation of the banded-structure membrane fuel cell module, which consisted of 15 polymer electrolyte membrane fuel cells laid out in a plane. Therefore, the voltage of each cell, the concentration of oxygen in the cathode vicinity, cell temperature and AC impedances were measured. As a result, the cause of the performance deterioration generated the condensation by humidity's locally increasing in the cathode vicinity, obstructed the gas exchange, and concluded that the possibility by so-called flooding was high.
