Fig. 2 | Scientific Reports

Fig. 2

From: Operando visualization of water distribution hysteresis under temperature cycling in polymer electrolyte fuel cells

Fig. 2

Fuel cell performance during operando synchrotron X-ray CT imaging under three target relative humidity (RH) conditions: (i) high RH (80%, blue), (ii) medium RH (60%, green), and (iii) low RH (40%, red). (a) Cell temperature profile showing a thermal cycle from 5 °C to 40 °C and back to 5 °C. (b) RH at both the cathode and anode inlets. (c) Current density response under potentiostatic operation at 0.1 V.

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