磺化聚芳醚砜/磺化聚乙烯醇交联膜的制备及在甲醇燃料电池中的应用

Preparation of Sulfonated Polyarylethersulfone/Sulfonated Polyvinyl Alcohol Crosslinked Film and Its Application in Methanol Fuel Cell

在甲醇燃料电池应用中,目前商业化的Nafion膜不仅成本高,而且质子选择性差。针对这一问题,文中选用成本较低的高磺化度磺化聚芳醚砜(SPAES)作为基体,通过简单的热处理制备了磺化聚芳醚砜(SPAES)交联聚乙烯醇(PVA)膜(SPAES-C-PVA)和磺化聚芳醚砜交联磺化聚乙烯醇(SPVA)膜(SPAES-C-SPVA)。SPAES-C-SPVA交联膜展示出良好的力学性能、尺寸稳定性及甲醇阻隔性,并且其质子选择性高达13.6×10^4 S·s·cm^-3,约为SPAES膜的3倍、Nafion117膜的4.3倍。

In methanol fuel cell applications,the commercial Nafion membrane has not only high cost but also poor proton selectivity.In order to overcome this contradiction,a low-cost sulfonated polyarylethersulfone(SPAES)was used as matrix to prepare a SPAES crosslinked polyvinyl alcohol(PVA)film(SPAES-C-PVA)and SPAES crosslinked sulfonated polyvinyl alcohol(SPVA)film(SPAES-C-SPVA)by heat treatment.The SPAES-C-SPVA film exhibits good mechanical properties,dimensional stability and methanol barrier properties.The proton selectivity of SPAES-C-SPVA is as high as 13.6×10^4 S·s·cm^-3,which is about 3 times and 4.3 times than that of the SPAES and Nafion 117 membrane,respectively.