Alkaline ion-solvating polymer electrolyte membranes derived from poly(isatin biphenyl) and polybenzimidazole (-PBI) blends with different ratios were prepared, characterized, and evaluated as electrode separators in alkaline water electrolysis. The physicochemical properties could be tuned by varying the composition of the blend, and the membrane with a poly(isatin biphenyl) content of 25 % showed a suitable balance between conductivity and mechanical robustness. The polarization behavior was comparable to that of state-of-the-art separators, with significantly lower H permeability. No signs of degradation could be observed after 70 h of electrolysis testing in 30 % aqueous KOH at 80 °C, supporting that macromolecular reinforcement is a promising way forward in the development of high-performing and durable alkaline ion-solvating membranes for water electrolysis.

中文翻译：

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碱性离子溶剂化聚合物电解质的高分子增强

制备了由不同比例的聚（靛红联苯）和聚苯并咪唑（-PBI）共混物衍生的碱性离子溶剂化聚合物电解质膜，并对其作为碱性水电解中的电极隔膜进行了表征和评估。可以通过改变共混物的组成来调节物理化学性质，聚靛红联苯含量为 25% 的膜在电导率和机械强度之间显示出适当的平衡。其极化行为与最先进的分离器相当，且 H 渗透率显着降低。在 80 °C 的 30% KOH 水溶液中进行 70 小时的电解测试后，没有观察到降解的迹象，这支持了大分子增强是开发用于水电解的高性能和耐用的碱性离子溶剂化膜的有前途的方法。