Poly(aryl piperidinium) (PAP) anion exchange membranes (AEMs) furnish an important avenue for the commercialization of anion exchange membrane fuel cells (AEMFCs), but their ionic conductivity and alkali resistance still need to be improved. Here, we report the synthesis of PAP AEMs with a branched structure by the acid-catalyzed reaction and compare them with the main-chain AEMs. The experimental results show that the branched AEMs have higher OH⁻ conductivity and alkaline resistance than the poly(terphenyl piperidine) (PTPQ1) AEM. The alkaline stability and OH⁻ conductivity of the AEMs were further improved by a flexible multi-cation crosslinker. The results show that the branched poly(p-terphenyl triphenylmethane 1-methyl piperidine) membrane crosslinked by multi-cation (PTTPQ4-40) shows an excellent OH⁻ conductivity (155.3 mS cm⁻¹) at 80 °C. The OH⁻ conductivity of the PTTPQ4-40 membrane was maintained at 92.1% after soaking in 2 M NaOH for 1080 h at 80 °C. In addition, the peak power density (PPD) of the crosslinked PTTPQ4-40 membrane can reach 656.7 mW cm⁻². Compared to the PTPQ1 AEM, the PPD of the crosslinked PTTPQ4-40 AEM is increased by 38.6% in H₂-O₂. All of the results confirm that the PTTPQ4-40 AEM has excellent fuel cell application prospects.

聚芳基哌啶 (PAP) 阴离子交换膜 (AEM) 为阴离子交换膜燃料电池 (AEMFC) 的商业化提供了重要途径，但其离子电导率和耐碱性仍有待提高。在这里，我们报告了通过酸催化反应合成具有支链结构的 PAP AEM，并将它们与主链 AEM 进行比较。实验结果表明，支链 AEM 比聚三联苯哌啶 (PTPQ1) AEM 具有更高的 OH ^-电导率和耐碱性。碱性稳定性和 OH ^-柔性多阳离子交联剂进一步提高了 AEM 的导电性。结果表明，由多阳离子交联的支化聚(对三联苯三苯甲烷1-甲基哌啶)膜(PTTPQ4-40 )在80℃下显示出优异的OH ^-电导率(155.3 mS cm ^{-1 )。}PTTPQ4-40 膜的 OH ^-电导率在 80 °C 下在 2 M NaOH 中浸泡 1080 小时后保持在 92.1%。此外，交联的PTTPQ4-40膜的峰值功率密度（PPD）可以达到656.7 mW cm ^-2。_{与 PTPQ1 AEM 相比，交联 PTTPQ4-40 AEM 在 H 2} -O ₂中的 PPD 提高了 38.6%. 所有结果证实了PTTPQ4-40 AEM具有良好的燃料电池应用前景。