In this paper, we investigate how the membrane layer's thickness affects the cross-over methanol phenomena and, consequently, the effectiveness of fuel cells. The anode to cathode electron transfer rate is reduced as a result of the methanol cross-over phenomena, which also affects the battery's overall performance. To avoid this phenomenon, we have proposed a solution, which is the increase of the thickness of the membrane and study of the curves of each of the potential differences as a function of the current intensity, in addition to calculating the parasitic current and observing the methanol diffusion curves through the membrane's thickness. Basée sur le logiciel COMSOL 5.4, cette étude simule en deux dimensions la somme des équations de diffusion, l'intensité du courant, le courant parasite et la différence de potentiel. The results of the study demonstrate the effectiveness of the research and methodology.

COMSOL mutiphysique, Modeling, Methanol cross-over, Membrane thickness