空气中SO_2杂质气体对PEMFC性能的影响

Effects of SO_2 in air on the performance of proton exchange membrane fuel cell

质子交换膜燃料电池(PEMFC)通常采用空气作为氧化剂的载体,空气质量对PEMFC的性能产生一定的影响,而其中SO2是空气中的主要污染物之一。主要通过恒电流放电曲线、极化曲线、循环伏安(CV)和电化学阻抗谱(EIS)等方法,研究了空气中含不同浓度的SO2时电池的中毒行为,并初步分析了催化剂中毒的机理,为进一步解决燃料电池环境适应性问题奠定了基础。

Ambient air is often used as oxidant in proton exchange membrane fuel cell （PEMFC）. Its quality can significantly influence the performance of PEMFC. Sulfur dioxide is one of the major contaminations in atmosphere. The poisoning behaviors were studied by voltage-time curves,polarization curves,cyclic voltammetry（CV） and electrochemical impedance spectroscopy （EIS）. The poisoning mechanisms of catalyst also were investigated, which would supply the reference for finding the solutions to solve environment adaption of PEMFC.