Side-chain functionality is critical to achieve highly conductive and chemically stable anion exchange membrane (AEM) materials. Herein, two series of quaternized poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) having different lengths (n or m) of cationic side-chains were designed and prepared, including PPO-C-nQA with a triazole-containing linker and PPO-mQA without triazole groups in the side chains. The effect of the side-chain functionality on the properties of AEMs has been systematically investigated. Long cationic side chains in PPO-mQA membranes induced the formation of obvious microphase-separated morphology. However, PPO-C-nQA membranes with a triazole-containing linker showed a considerable higher hydroxide conductivity than that of PPO-mQA membranes, due to the developed hydrogen-bond networks between triazole and water/hydroxide. High retention of conductivity and low degree of crosslinking were observed for the AEMs with longer side-chains (PPO-C-3QA, PPO-C-4QA, PPO-6QA, and PPO-7QA) in the alkaline stability testing under 10 M NaOH at 80 °C for 250 h, indicating their excellent stability. Moreover, a single H₂/O₂ AEMFC with these side-chain type AEMs demonstrated that PPO-C-1QA with highest conductivity exhibited a peak power density of 141.3 mW cm⁻² at a current density of 320 mA cm⁻².

侧链功能对于获得高导电性和化学稳定性的阴离子交换膜（AEM）材料至关重要。本文设计并制备了两个系列的阳离子侧链长度（n或m）不同的季铵化聚（2,6-二甲基-1,4-苯撑氧）（PPO），包括PPO-C- n QA和含三唑的连接基和侧链中无三唑基团的PPO- m QA。侧链功能对AEMs性能的影响已得到系统地研究。PPO- m QA膜中的长阳离子侧链可诱导形成明显的微相分离形态。但是，PPO-C- n由于三唑与水/氢氧化物之间形成了氢键网络，具有含三唑连接基的QA膜显示出比PPO- m QA膜高得多的氢氧化物电导率。在10 M NaOH下进行的碱性稳定性测试中，观察到具有较长侧链的AEM（PPO-C-3QA，PPO-C-4QA，PPO-6QA和PPO-7QA）具有较高的电导率和较低的交联度在80°C下放置250小时，表明它们具有出色的稳定性。此外，单个ħ ₂ / O ₂ AEMFC与证明PPO-C-1QA具有最高电导率表现出141.3毫瓦厘米的峰值功率密度这些侧链型的AEM ^-2在320毫安cm 2的电流密度^-2。