A fuel cell with a gas diffusion media having a hydrophobic layer adjacent
a flow field plate and a hydrophilic layer adjacent the membrane
electrode assembly of the fuel cell. The two layers enable balanced
humidification of reactant gas along with a basis for managing capillary
water addition into the gas diffusion media. The combination of balanced
moisture flux (via the hydrophobic layer) and the retention of water (via
the hydrophilic layer) for humidifying reactant gas sustains hydration of
the proton exchange membrane while preserving the catalyst at full
activity.