In order to improve the performance of anion exchange membrane (AEMs) as the core component of alkaline fuel cell, a novel pentamethyl-contained phenolphthalein multi-arm monomer is synthesized. The highly imidazolium-functionalized poly (arylene ether ketone) membrane (Im-PEK-x) are prepared by introducing 1,2-dimethylimidazole as hydrophilic segments. The monomer, polymer and anion exchange membranes are confirmed by ¹H NMR spectra. The well-defined micro-phase separated structure of membranes is conducive to ion transport and the structure is investigated by TEM and SAXS. The imidazolium-functionalized membranes (Im-PEK-0.8) exhibits high ionic conductivity (0.148 S/cm at 80 °C). The tensile strength of Im-PEK-0.8 membrane is 30.06 MPa. Furthermore, after immersing in 60 °C, 2 M NaOH solution for 240 h, the ionic conductivity remains 0.092 S/cm for Im-PEK-0.8. The 1,2-dimethylimidazole enhance alkaline stability by steric effect of the substituent group at the C2 position. All these results indicate that this is a new method to enhance conductivity and stability performance of AEMs.

为了提高阴离子交换膜（AEMs）作为碱性燃料电池的核心组件的性能，合成了一种新型的五甲基酚酞多臂单体。通过引入1,2-二甲基咪唑作为亲水链段，可以制备高度咪唑鎓官能化的聚（亚芳基醚酮）膜（Im-PEK-x）。单体，聚合物和阴离子交换膜的确认为¹1 H NMR谱。明确定义的微相分离膜结构有利于离子迁移，并通过TEM和SAXS研究了该结构。咪唑鎓官能化膜（Im-PEK-0.8）表现出高离子电导率（80°C时为0.148 S / cm）。Im-PEK-0.8膜的拉伸强度为30.06 MPa。此外，在60°C的2 M NaOH溶液中浸泡240小时后，Im-PEK-0.8的离子电导率仍为0.092 S / cm。1，2-二甲基咪唑通过C 2位置上的取代基的空间效应来增强碱稳定性。所有这些结果表明，这是一种增强AEM导电性和稳定性能的新方法。