质子交换膜燃料电池的性能

The Performances of Proton Exchange Membrane Fuel Cells

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．

Black Platinum as electrocatalyst, Nafion 117 as electrolytes, the membrane & electrodes were formed. The effects of electrode structures, fuel cell structures, and operatinn conditinns on the performances of proton exchange membrane fuel cells were analyzed. The results show: there are optimal ranges about the contents of PTFE and Nafion in catalyst layers. The less can not offer enough reaction interfaces, gas channel and proton channel, The more will increase the resistunas of gases and protons transport. Raising temperature and pressure will increase electrochendcal ndion and reduce transport resistance. The benefits of a good fuel cell structure lie in better water remove and electronic contact.