Role of the diffuse layer in acidic and alkaline fuel cells

摘要: A numerical model is developed to study electrolyte dependent kinetics in fuel cells. The based on the Poisson–Nernst–Planck (PNP) and generalized-Frumkin–Butler–Volmer (gFBV) equations, used understand how diffuse layer ionic transport play a role performance difference between acidic alkaline systems. laminar flow cell (LFFC) as architecture allow for appropriate comparison of equivalent We overall individual electrode polarizations cells both balanced unbalanced well presence limitations. results predict behavior composition that strongly correlates with observed experimental from literature provides insight into fundamental cause these results. Specifically, it found working ion concentration at reaction plane plays significant including activation losses response different kinetic rates an electrode. where its consumed are Therefore, we compare region From this conclude oxidant reduction cathode slow oxidation (such alcohol oxidation) can be improved electrolyte.