Electrochemical Analysis of Microporous Layer Parameter Optimization in Anion Exchange Membrane Electrolyzer Based on Three‐Dimensional Multiphysics Simulation

This study establishes a three‐dimensional, nonisothermal, two‐phase flow anion exchange membrane electrolyzer cell (AEMEC) numerical model that includes a microporous layer (MPL). The effects of flow field design, operating parameters, and key component structural parameters on the performance of electrolytic cells were studied. Results indicate that the serpentine flow channel, with its “piston flow” effect, can achieve more uniform species distribution and temperature field compared to parallel flow channels. It exhibits superior electrochemical performance at high operating voltage with a current density increase of approximately 7.8% at 2.3 V. Parameter analysis shows that increasing operating voltage and inlet water temperature can significantly improve gas production rate. For MPLs, there exists an optimal range of MPL parameters (porosity ε = 0.5–0.6, thickness d = 25–35 µm) that can achieve the best balance between mass transfer resistance and conductivity. In addition, reducing the thickness of the AEM can effectively reduce the Ohmic loss. This study provides theoretical basis and data support for the design and optimization of key components of high‐performance AEMEC.