Three-Dimensional Modeling and Simulation of a High-Temperature PEM Fuel Cell with Novel Composite Membranes based on Dicationic Ionic Liquid and Polybenzimidazole Mixtures

In the current paper, a three-dimensional, steady-state model has been introduced for novel proton exchange membranes (PEM) containing dicationic ionic liquids appropriatefor elevated temperature fuel cells under an anhydrous environment. Development of such a model requires utilizing the 3D geometry and detailed mesh grid and discretization of momentum. Mass and electric charge balance equations were solved based on the information obtained from electrical and electrochemical models within various areas of the cell such as porous electrodes, gas channels, and the solid parts and current collector, especially. Additionally, a description of the electrochemical reactions on the active sites of the anode and cathode electrodes, and ions' movement through the electrolyte is considered. The equations were solved by applying a finite element method solver. Finally, the results of the model are compared with the experimental data (current density-voltage graph). This graph shows a good correlation between the model and experiments validating the present simulation. This model is also able to predict PEMFC behavior under different operational conditions