Flexible organic–inorganic polymer nanocomposite membranes with uniformly distributed metal oxide nanoparticles were prepared using sulfonated poly(ether ether ketone) (SPEEK) as a base material and praseodymium oxide (PSO) as an inorganic additive. The degree of sulfonation of SPEEK was determined by proton nuclear magnetic resonance (NMR) analysis and found to be 60%. The characteristic properties of the polymer nanocomposite membranes were examined by thermogravimetric analysis, X-ray diffraction, ion exchange capacity, water uptake ability, and proton conductivity. The incorporation of metal oxide into the polymer matrix was confirmed by scanning electron microscope with energy dispersive X-ray spectroscopy and X-ray diffraction analyses. The nanocomposite membrane exhibits good thermal stability when compared to that of the pristine membrane and SPEEK with 10 wt% of PSO loading was found to be stable up to 450°C. The assessment of polymer electrolyte membrane is accomplished by fabricating membrane electrode assemblies of pure SPEEK and SP-PSO-10 membranes and the latter produced maximum peak power density of 622 mW cm−2. The constructed SPEEK/PSO nanocomposite membranes offered superior physicochemical properties while applying these materials in an H2-O2 fuel cell.

中文翻译：

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用于燃料电池应用的新系列有机-无机聚合物纳米复合膜

以磺化聚（醚醚酮）（SPEEK）为基材，氧化镨（PSO）为无机添加剂，制备了具有均匀分布的金属氧化物纳米颗粒的柔性有机-无机聚合物纳米复合膜。SPEEK的磺化度通过质子核磁共振(NMR)分析测定，发现为60％。通过热重分析、X 射线衍射、离子交换容量、吸水能力和质子电导率检测聚合物纳米复合膜的特性。通过具有能量色散 X 射线光谱和 X 射线衍射分析的扫描电子显微镜证实了金属氧化物掺入到聚合物基体中。与原始膜相比，纳米复合膜表现出良好的热稳定性，并且发现具有 10 wt% PSO 负载的 SPEEK 在高达 450°C 时是稳定的。聚合物电解质膜的评估是通过制造纯 SPEEK 和 SP-PSO-10 膜的膜电极组件来完成的，后者产生的最大峰值功率密度为 622 mW cm-2。构建的 SPEEK/PSO 纳米复合膜在将这些材料应用于 H2-O2 燃料电池时提供了优异的物理化学性能。