The flow characteristics , distributions of current density and chemical components , and the performance of these two different designs are calculated and compared . the flow and mass transport characteristics are analyzed in detail , which indicate that strong forced convection is produced in the interdigitated flow field , which consist of dead - end gas channel that force the gases through the porous electrodes . results of comparison show that forced convection induced by the interdigitated flow field in the diffusion layer effectively enhances mass transport of reactants and products , thus leading to a higher cell performance and the limiting current density 在傳統(tǒng)流道設(shè)計(jì)的pemfc中,反應(yīng)物從流道到催化層的供應(yīng)和生成物從催化層到流道的排出主要是以擴(kuò)散為主,而在交叉梳狀流道設(shè)計(jì)中,以流動(dòng)帶動(dòng)的對(duì)流傳遞則占據(jù)了主導(dǎo)地位,而且這種以對(duì)流為主的傳遞機(jī)理大大提高了反應(yīng)物和產(chǎn)物傳遞速率,從而有效地改善了電池的極限電流密度和極化性能等特性。