Furthermore, the normalized resistance in all components increases by the rise of pressure, and GDL has the lowest amount of resistance. The amendment of mass flux in different pressures is a decisive feature in the resistance in GDL. The oxygen concentration gradient increases through GDL thickness as pressure increases, but the diffusivity coefficient decreases. It leads to a maximum point on the normalized diffusive mass flux curve. On the other hand, the amount of normalized convective mass flux drops by pressure increment. As a result, the resistance in GDL increases.