The PEMFC performance increased with the increase in the air stoichiometry. For the 1.5 air stoichiometry, the voltage fluctuation under vibration is bigger compared with no vibration. That is owing to low flow rate is difficult to blow away the water droplets, when the flow channel has a large number of small water droplets, suddenly vibration of the PEMFC cause small droplets coalesce into larger droplets, which interferes with the mass-transfer process