Abstract Because of the harsh operating circumstances of high temperature over 100 °C and strong acidity, it is of great significance to explore some new methods on the developments of high-performance membrane materials using in high-temperature proton exchange membrane fuel cells (HT-PEMFCs). In current work, with the assistance of newly designed sulfonated poly (aryl ether ketone) (SPAEK) compatibilizer, some hydrophilic and acidophilic polyhedral-oligosilsesquioxane nanoparticles bearing sulfuric acid groups (SPOSS) were successfully incorporated into a soluble arylether-type polybenzimidazole (Ph-PBI) matrix via an in situ Sol-Gel process to obtain a new family of hybrid membranes with an improved overall performance. As a result, these hybrid membranes exhibited enhanced acid absorption ability and doping levels at 120 °C, improved acid retention ability and attractive mechanical-dimensional stability. More importantly, the proton conductivity of a phosphoric acid doped hybrid membrane reached 126 mS cm−1 at 200 °C. This membrane was also suitable for membrane electrode assemblies (MEAs), and a maximum power density of 300 mW cm−2 could be achieved at 160 °C without humidity.

中文翻译：

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使用 SPAEK 作为增容剂制备 PBI/SPOSS 混合高温质子交换膜

摘要 由于 100 °C 以上高温和强酸性的恶劣工作环境，探索用于高温质子交换膜燃料电池（HT- PEMFC)。在目前的工作中，在新设计的磺化聚（芳醚酮）（SPAEK）增容剂的帮助下，一些亲水性和嗜酸性的多面体-低聚倍半硅氧烷纳米颗粒（SPOSS）被成功地结合到可溶性芳醚型聚苯并咪唑（Ph- PBI) 基质通过原位溶胶-凝胶工艺获得具有改进的整体性能的新型混合膜系列。因此，这些混合膜在 120 °C 下表现出增强的酸吸收能力和掺杂水平，改进的酸保留能力和有吸引力的机械尺寸稳定性。更重要的是，磷酸掺杂混合膜的质子电导率在 200°C 时达到 126 mS cm-1。该膜也适用于膜电极组件 (MEA)，在 160°C 且无湿气的情况下可实现 300 mW cm-2 的最大功率密度。