Application of the Transmission Line EIS Model to Fuel Cell Catalyst Layer Durability

Abstract

We have recently demonstrated that the inclusion of electrochemical impedance spectroscopy (EIS) into accelerated stress tests (AST) can provide a wealth of information about the modes of degradation occurring within a fuel cell catalyst layer. In those reports we have used half-cell techniques to validate the interpretation of the transmission line model for durability studies. Here, we have performed AST with membrane-electrode assemblies in fuel cell and applied EIS diagnostics to verify the usefulness of this technique in durability testing.