The ether-bond-free poly(biphenyl piperidine)s are prepared to improve the alkaline stability of the anion exchange membrane (AEMs). At the same time, the construction of micro-phase separation structure is a good way to solve the “trade-off” problem between ionic conductivity and stability of AEMs. In this study, we report a new method for constructing micro-phase separation structures based on “main-chain type” AEMs and a crosslinking strategy that does not sacrifice ion exchange capacity. A series of poly(biphenyl piperidine)s AEMs (PAP–OH–x) are prepared by introducing 2-bromoethanol and 1,6-dibromohexane to form piperidine cationic groups and cross-linked structure. The structure of hydrophilic/hydrophobic phase separation is confirmed by TEM images. The cross-linked membrane of poly(biphenyl piperidine)s (PAP–OH–8%) membrane exhibits high conductivity of 0.081 S/cm with a rational water absorption (55.6%) and low swelling ratio (11.8%) at 80 °C, and also preserves the hydroxide conductivity (89.2% retention) after testing in a 5 M NaOH aqueous solution at 80 °C for 30 days, exhibits high alkaline stability. Furthermore, a single H₂/O₂ fuel cell with poly(biphenyl piperidine)s (PAP–OH–8%) membrane exhibits the open circuit voltage of 1.02 V and the peak power density of 290 mW/cm² at 60 °C.

制备无醚键的聚（联苯哌啶）以提高阴离子交换膜（AEM）的碱性稳定性。同时，微相分离结构的构建是解决离子电导率与AEMs稳定性之间“权衡”问题的好方法。在这项研究中，我们报告了一种基于“主链型” AEM和不牺牲离子交换能力的交联策略构建微相分离结构的新方法。通过引入2-溴乙醇和1,6-二溴己烷以形成哌啶阳离子基团和交联结构，制备一系列聚联苯哌啶的AEM（PAP-OH-x）。通过TEM图像确认了亲水/疏水相分离的结构。聚（联苯哌啶）（PAP–OH–8％）膜的交联膜在80°C时具有0.081 S / cm的高电导率，具有合理的吸水率（55.6％）和低溶胀率（11.8％）。在5 M NaOH水溶液中于80°C下测试30天后，还可以保持氢氧化物的电导率（保留89.2％），具有很高的碱性稳定性。此外，单个H具有聚（联苯哌啶）（PAP–OH–8％）膜的₂ / O ₂燃料电池在60°C下的开路电压为1.02 V，峰值功率密度为290 mW / cm ²。