Abstract A three-layer membrane (TLM) of radiation grafting graphene oxide reinforced polybenzimidazole/porous polybenzimidazole/radiation grafting graphene oxide reinforced polybenzimidazole (PBI-RGO/PPBI/PBI-RGO) was fabricated and then doped with phosphoric acid (PA) for high temperature proton exchange membranes (HT-PEMs) in anhydrous atmosphere. These TLMs have a sandwich structure and the diameter of most pores falls in the range between 500 nm and 2 μm. PA doped TLMs display excellent mechanical strength and oxidative stability. The tensile strength of PA doped PBI-RGO/PPBI/PBI-RGO membranes ranges from 22.7 to 38.5 MPa, which is significantly higher than that of PA doped PPBI membrane (7.9 MPa). The introduction of RGO and porous structure can improve the proton conductivity of membranes. The proton conductivity of PA doped PBI-RGO/PPBI-80/PBI-RGO membrane is 113.8 mS·cm−1 at 170 °C without humidity, with an increase of 4.9 times compared with that of PA doped PBI membrane. The sandwich structure endows the membrane with lower PA leakage and higher proton conductivity, thus making it a promising membrane for HT-PEM applications.

中文翻译：

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用于无水气氛高温质子交换膜燃料电池的夹层结构辐射接枝氧化石墨烯增强聚苯并咪唑膜

摘要 制备了辐射接枝氧化石墨烯增强聚苯并咪唑/多孔聚苯并咪唑/辐射接枝氧化石墨烯增强聚苯并咪唑（PBI-RGO/PPBI/PBI-RGO）的三层膜（TLM），然后掺杂磷酸（PA）以获得高无水气氛中的高温质子交换膜（HT-PEM）。这些 TLM 具有夹心结构，大多数孔的直径介于 500 nm 和 2 μm 之间。PA 掺杂的 TLM 显示出优异的机械强度和氧化稳定性。PA掺杂的PBI-RGO/PPBI/PBI-RGO膜的拉伸强度范围为22.7~38.5 MPa，明显高于PA掺杂的PPBI膜（7.9 MPa）。RGO和多孔结构的引入可以提高膜的质子传导性。PA掺杂的PBI-RGO/PPBI-80/PBI-RGO膜在170℃无湿条件下的质子电导率为113.8 mS·cm-1，与PA掺杂的PBI膜相比提高了4.9倍。夹心结构使膜具有更低的 PA 泄漏和更高的质子传导性，从而使其成为 HT-PEM 应用的有前途的膜。