MOXIE Cell Cross-Section: Ion Electromigration & O2 Yield (2D)

This 2D companion to the 3D MOXIE stack simulator zooms in from a whole column of cells to a single solid-oxide electrolysis cell's cross-section, and computes the physical step the 3D view leaves implicit: how fast the O²⁻ ions that carry the electrolysis current actually drift across the ceramic electrolyte membrane. Starting from the same Nernst-potential, temperature-dependent ohmic resistance and Faraday's-law electrochemistry, this model derives an ionic current density and, from an assumed mobile-ion concentration for the electrolyte, a real drift velocity and membrane-crossing time — both reported numerically alongside a live strip chart of O₂ yield and CO₂ conversion. Tune cell voltage, stack size, CO₂ flow and temperature to watch the ion stream across the membrane speed up or stall, and see the corrected CO₂-supply ceiling actually bind at low flow.