Analysis of the electrochemical behaviour of polymer electrolyte fuel cells using simple impedance models

Effects of Humidification on the Membrane Electrode Assembly of Proton Exchange Membrane Fuel Cells at Relatively High Cell Temperatures

“…In Watanabe et al's note [24], membrane resistivity uniformly decreases with increasing discharge rate, which is probably caused by the back diffusion of cathode generated water. Zhang et al and many other researchers [25][26][27][28] made similar observations as that by Watanabe's group. Saleh et al [11] found that, for a dry air feed, the trend of membrane resistivity, with respect to the current density, differs depending on the anode humidification setting for a cell operating temperature of 70°C.…”

Simplified model for evaluating ripple effects on commercial PEM fuel cell

“…However, in many cases it is not able to accurately represent the behavior of the cell in dynamic conditions. For this reason extended versions have been proposed, introducing parameters or circuit elements such as the Nernst impedance, the Warburg impedance, the constant-phase element and their bounded versions and combining them to fit the experimental data [29,31]. Another approach has consisted in the use of structural circuits instead of lumped-element circuits, as Maxwell's or Voigt's structures and transmission-line models [29,30].…”

Study of the electrochemical behaviour of a 300 W PEM fuel cell stack by Electrochemical Impedance Spectroscopy

“…In the case of fuel cells, in particular of the PEMFCs, it provides detailed information on the intrinsic loss factors, on the conductivity of the membrane, on the electrode processes, and on kinetic losses. The measurement of the impedance spectrum at an operating point and the identification of an appropriate impedance model enable the desired distinction of loss terms, and a description of the dynamic electrochemical behaviour of a fuel cell [9][10][11][12][13][14][15][16].…”