Abstract A suitable microphase separation morphology has been demonstrated to be an efficient strategy to achieve high ionic conductivity with reasonable durability to anion exchange membranes (AEMs). Herein, hydrophilic oligomers of polyethylene glycols (PEGs) with different molecular weights were blended, separately, with poly(2,6-dimethyl-1,4-phenylene oxide) modified by 4,4-diethoxybutan-1-amine and 1-methylpiperidine (20PDM). The presence of hydrophilic PEGs facilitates the formation of the interconnected nano-channels in the AEMs for ion conduction according to the analysis results by both transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS). The membrane containing 2 wt% PEGs with a molecular weight of 2 kDa reaches a hydroxide conductivity of 97.2 mS cm-1 at 80 °C, which is 25 mS cm-1 higher than that the pristine 20PDM membrane possessing the same ion exchange capacity. A peak power density of 328 mW cm-2 is attained at 60 °C by the proposed membrane based single fuel cell fueling with humidified H2 and O2 with 0.1 MPa of back pressure. The chemical structure, water uptake and swelling as well as resistance to hot alkali solutions of the prepared membranes were investigated.

中文翻译：

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通过在哌啶官能化聚（2, 6-二甲基-1, 4-苯醚）膜中嵌入亲水性低聚物来构建离子传导通道

摘要 合适的微相分离形态已被证明是实现高离子电导率和对阴离子交换膜 (AEM) 具有合理耐久性的有效策略。在此，具有不同分子量的聚乙二醇 (PEG) 的亲水低聚物分别与由 4,4-二乙氧基丁-1-胺和 1-甲基哌啶改性的聚 (2,6-二甲基-1,4-苯醚) 共混(20PDM)。根据透射电子显微镜 (TEM) 和小角 X 射线散射 (SAXS) 的分析结果，亲水性 PEG 的存在促进了 AEM 中用于离子传导的互连纳米通道的形成。含有 2 wt% PEG、分子量为 2 kDa 的膜在 80 °C 下的氢氧化物电导率达到 97.2 mS cm-1，这比具有相同离子交换容量的原始 20PDM 膜高 25 mS cm-1。建议的膜基单燃料电池在 0.1 MPa 的背压下使用加湿的 H2 和 O2 燃料，在 60°C 下达到 328 mW cm-2 的峰值功率密度。研究了制备的膜的化学结构、吸水率和溶胀性以及对热碱溶液的耐受性。