The N1-substituted (methyl, isopropyl, butyl, benzyl or dodecyl) 2-methylimidazolium functionalized polynorbornene (rPNB-RMIm-30) AEMs are prepared and the effects of substituents are studied. The N1-butyl or isopropyl-substituted 2-methylimidzolium (rPNB-BuMIm-30 or rPNB-iPrMIm-30) anion exchange membrane (AEM) reveals much better alkaline durability than that of methyl, benzyl and dodecyl-substituted 2-methylimidazolium-based AEMs, reflected by the almost unaltered FT-IR spectra and TGA curves after being subjected to 1 M NaOH for 720 h at 60 °C, with a conductivity degradation of 17% and 14% respectively. Furthermore, a highest hydroxide conductivity (51.5 mS cm⁻¹, 80 °C) is achieved of the rPNB-BuMIm-30 AEM, attributing to its well-defined phase-separated structure, as evidenced by results of atomic force microscope (AFM) and X-ray scattering (SAXS). Membrane electrode assembly (MEA) with rPNB-BuMIm-30 AEM exhibits a peak power density of 205 mWcm⁻² at 60 °C. This study paves the way of N1-Substituented 2-methylimidazolium-based AEM for fuel cells practical application.

制备了N1-取代的（甲基，异丙基，丁基，苄基或十二烷基）2-甲基咪唑鎓官能化的聚降冰片烯（rPNB-RMIm-30）AEM，并研究了取代基的作用。N1-丁基或异丙基取代的2-甲基咪唑鎓（rPNB-BuMIm-30或rPNB-iPrMIm-30）阴离子交换膜（AEM）的碱性耐久性要比甲基，苄基和十二烷基取代的2-甲基咪唑鎓基在60°C下于1 M NaOH中浸泡720 h后，几乎不改变的FT-IR光谱和TGA曲线所反映的AEM，其电导率分别下降了17％和14％。此外，最高的氢氧化物电导率（51.5 mS cm ^-1rPNB-BuMIm-30 AEM达到了80°C的温度，这归因于其定义明确的相分离结构，原子力显微镜（AFM）和X射线散射（SAXS）结果证明了这一点。具有rPNB-BuMIm-30 AEM的膜电极组件（MEA） 在60°C下的峰值功率密度为205 mWcm ^-2。这项研究为燃料电池实际应用铺平了N1-取代的2-甲基咪唑鎓基AEM的道路。