Performance Test And Mechanism Analysis Of Proton Exchange Membrane Fuel Cell

The demand for energy by mankind is increasing because of the continuous development of society.When the amount of non-renewable fossil energy is decreasing,a new type of energy,hydrogen,will gradually come into sight.Among the various ways of using hydrogen energy,proton exchange membrane fuel cells are the most ideal ones which have the ability to convert hydrogen energy into electrical energy,with the advantages of high conversion rate,zero emission.In this paper,the proton exchange membrane fuel cell is tested for temperature,humidity,and other operating conditions through a combination of experiments and simulations.It is found to be at 75°C,100%humidified inflow gas,70%membrane electrode compression ratio,30 psig gas pressure at both ends of cathode and anode,and the stoichiometric ratio of hydrogen and air flow is 1.5:2.5,the battery performance is optimized.Analyze the intrinsic cause of the battery’s optimal operating conditions from the mechanism aspect by building a battery model.After finding the best working conditions,the effects of impurities such as CO,CO₂,etc.on the battery performance are investigated.It is found that CO₂ had no serious effect on the battery performance;CO could lead to catalyst poisoning and lead to a sharp drop in battery performance.The performance recovery of CO poisoned batteries can be restored to 93%of the battery performance under normal conditions by means of oxygen reduction.