Structural Characteristics of Proton Exchange Membrane Fuel Cell Cathode Diffusion Layer Affect Cell Performance of the Simulation

Abstract

In order to study the diffusion layer porosity exchange membrane fuel cell properties of protons, in this thesis, direct-coupled multi-physics analysis software COMSOL Multiphysics 3D model four-stream channel serpentine flow field proton exchange membrane fuel (PEMFC), the porosity is considered separately the impact on cell performance 0.3,0.4,0.5,0.6. In the cell temperature is kept constant 353K to give the effect of porosity on the battery performance, temperature and pressure. The simulation results were analyzed and compared results: Cell temperature increases the porosity increases, and the more severe the greater the porosity of the reaction cell, cell pressure at the center of the flow channel is smaller, the pressure also will be reduced, so the greater the porosity, the better the battery performance. But the actual application at the same time increasing the porosity, thickness should be appropriately increased. The simulation results to improve fuel cell performance have some certain significance.