关键词: 质子交换膜燃料电池, 膜电极装备, 直接涂膜技术

Abstract: The effect of each composition in catalyst ink on the performance of fuel cell was studied with the catalyst layer prepared by the directly printing catalyst on membrane technique.Isopropanol was the solvent and pore forming agent in catalyst ink.When the ratio of catalyst and isopropanol in catalyst ink was equal to about 1∶10, the performance of fuel cell was the best.Nafion was used both as a good binder and proton conductor in the catalyst layer.For the directly printing technique,direct application apparently improves the interfacial continuity between the Nafion ionomer in membrane and the Nafion ionomer in the catalyst layer.It was shown that the optimum content of dry Nafion (NFP) was about 33%.The effect of different Pt contents of Pt/C catalysts on the performance of fuel cell was investigated, and the optimum content of isopropanol and dry Nafion were determined based on different catalysts respectively.Finally the effect of different catalyst layers on the performance of fuel cell was studied.The more the catalyst layers,the better the performance of fuel cell with minor difference between catalysts.

Key words: 质子交换膜燃料电池, 膜电极装备, 直接涂膜技术