Fuel cell output performance and durability depend on the inherent state of the membrane electrode assembly (MEA) and the polar plate, as well as the operating state, such as the internal water and thermal states. The MEA, which comprises the membrane, catalyst layer (CL), and gas diffusion layer (GDL), is crucial, because the operating state affect the durability by degrading the MEA. Even for the metal bipolar plate, released metal ions degrade performance by contaminating the MEA and accelerating component degradation [41-43]. An increase in contact resistance, which originates from corrosion and passivation of the metal bipolar plate, also contributes to performance decay [41,42,44,45], thus requiring surface treatment or coating