Electrochemical impedance spectroscopy (EIS) is a technique used to estimate the physical processes limiting a fuel cell by applying a linear alternating signal to the cell and measuring its response. Analyzing the response however is difficult and has mainly relied on the use of equivalent circuits. We are extending our fuel cell simulation software, OpenFCST, to be able to predict the EIS response of our system as we vary different input parameters.

See, for example, Kosakian et al. article in Electrochimica Acta.