Durability current-voltage curves

Current-voltage curves and durability tests of the MEAs were measured by utilizing a single cell with a square-shaped active area (25 cm ). The cell temperature was kept constant at 120°C. Utilization of hydrogen and air was 50 50. For the measurement of the current-voltage curves, the cell pressures were varied in value from 127 to 280 kPa, and the RH of the inlet gas (both hydrogen and air) was varied from 25 to 100%. The OCV tests were condncted with the same cell. 

SRU and stack performance were evaluated through current density-voltage (i-V) measurements. I-V curves were plotted until a maximum cell voltage of 1.5 V. Short-term durability tests were conducted on the stack over a few hundreds of hours, the stack being galvanostatically controlled to reach an initial average voltage around 1.3 V per cell. 

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