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以铂黑为电催化剂、Nafion117为电解质制备了膜&电极组件,分析了电极结构、电池结构和操作条件对质子交换膜燃料电池性能的影响.结果表明:催化层内的聚四氯乙烯(PTFE)和质子导体Nafion的含量都有一最佳值范围,过少不能提供足够的反应界面、气体通道和质子通道;过多则增大气体和质子传递阻力.提高温度和压力将改善电池内电化学反应和传质.良好的电池结构将有利于电池排水和减小接触电阻.
Using platinum black as electrocatalyst, Nafion 117 was used as electrolyte to prepare membrane & electrode assembly. The influence of electrode structure, cell structure and operating conditions on the performance of proton exchange membrane fuel cell was analyzed. The results show that the content of polytetrafluoroethylene (PTFE) and proton conductor Nafion in the catalyst layer has an optimum range. Too small an amount can not provide sufficient reaction interface, gas passage and proton passage; while excessive increase of gas and proton Transfer resistance. Increasing temperature and pressure will improve the electrochemical reaction and mass transfer within the cell. A good battery structure will help drain the battery and reduce the contact resistance.