A simple transient model for a high temperature PEM fuel cell impedance

We develop a pseudo two-dimensional, isothermal transient model for a high temperature proton exchange membrane fuel cell. It takes into account the dynamic change of oxygen concentration in the cathode gas diffusion layer and in the cathode channel. The model can be used to simulate and analyze electrochemical impedance spectra of the cell in both potentiostatic and galvanostatic modes, current interrupt results and step changes in the cell current or potential. The model is validated by fitting experimental data. •A fast transient physical model of high-temperature PEM fuel cell is developed.•It accounts for the dynamic change of O2 concentration in the cathode GDL and channel.•Cell impedance, current interrupt, step changes of potential or current are modeled.•The model enables estimation of cell parameters from a single impedance spectrum.