A new type of proton-conducting hybrid membranes were prepared by in situ cross-linking of a mixture of polymerizable oils containing protic ionic liquids (PILs) and silica nanoparticles or mesoporous silica nanospheres. The resultant hybrid membranes are semitransparent, flexible, and show good thermal stability, good and tunable mechanical properties. Incorporation of proper amount of silica fillers significantly increased, the proton conductivity of the membranes, probably due to the ion transport channel or network structures formed in the membranes. However, further addition of silica fillers might block the formed, ion transport, channels and decrease the conductivity of hybrid membranes. Compared with silica nanoparticles, mesoporous silica nanospheres is more effective in enhancing the conductivity and in preventing the release of ionic liquid component from the composite membranes. Under anhydrous conditions, the produced hybrid membranes show proton conductivity up to the order of 1 x 10 -2 S/cm at 160°C. These properties make this type of PIL-based hybrid membranes suitable for high-temperature polymer electrolyte membrane fuel cells.
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机译：通过原位交联含有质子离子液体（PIL）的可聚合油与二氧化硅纳米粒子或介孔二氧化硅纳米球的混合物，制备了新型的质子传导杂化膜。所得的杂化膜是半透明的，柔性的，并显示出良好的热稳定性，良好且可调节的机械性能。适当量的二氧化硅填料的掺入明显增加了膜的质子传导性，这可能归因于在膜中形成的离子传输通道或网络结构。但是，进一步添加二氧化硅填料可能会阻碍形成的离子迁移，通道并降低杂化膜的电导率。与二氧化硅纳米颗粒相比，介孔二氧化硅纳米球在增强电导率和防止离子液体组分从复合膜释放方面更有效。在无水条件下，制得的杂化膜在160°C下的质子传导率高达1 x 10 -2 S / cm。这些特性使这种基于PIL的混合膜适用于高温聚合物电解质膜燃料电池。
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