全氟磺酸离子交换重铸膜的结构与性能研究

An Investigation on Microstructure and Performance of the Recasting Perfluorosulfonated Membrane

本文研究全氟磺酸离子交换重铸膜的结构、性能并与Nafion 膜进行比较 .结果表明 :重铸膜FYM 115 0与Nafion 膜的成分相同 ,但它们具有不同的结构 ,FYM 115 0干膜中含有部分 5 0～30 0nm不贯穿断面的小孔 ,而Nafion112干膜为无孔密实结构 ;FYM 115 0的力学性能优于Nafion 膜 ;受多孔结构的影响 ,在高电流密度端 ,使用FYM 115 0制备的膜电极 。

The microsturcture and performance of the recasting perfluorosulfonated membrane were investigated by comparison with Nafion . The results indicated that although chemical components of the recasting membrane FYM1150 kept the same as Nafion , the dry FYM1150 differed from dry Nafion  membrane in structure, the former possessed some small pores which are not through-holes having a diameter of 50～300 nm while the latter had almost no pores; The mechanical properties of the FYM1150 were better than those of Nafion ; The discharge performance at high current density of MEA using FYM1150 membrane as an electrolyte was also better than one using Nafion  as electrolyted due to the porous structure in the FYM1150.