Use of Electrochemical Impedance Spectroscopy for the Evaluation of Performance of PEM Fuel Cells Based on Carbon Cloth Gas Diffusion Electrodes

Figure 6

Example of impedance spectra acquired at different current densities (i.e., from 0.1 A/cm² to 0.9 A/cm²) at high (a, c, e) and low (b, d, f) inlet gas flow rates for the reference sample, GDE2 anode, and GDE2 cathode.

(a)

(b)

(c)

(d)

(e)

(f)