Making inexpensive proton exchange membrane with high proton conductivity for the proton exchange membrane fuel cell (PEMFC) is still a challenging problem. Graphene oxide (GO) nanoparticles grafted with (3-amino-propyl) triethoxy silane (APTES) were prepared and then incorporated into sulfonated poly(ether ether ketone) (SPEEK) matrix by solution casting to make the composite proton exchange membrane. The obtained nanoparticles and composite membranes were characterized by XRD, FT-IR, Raman, TGA, SEM, and UTM. GO treated with the silane coupling agent improved the dispersion stability and compatibility of GO in SPEEK, which decreased the agglomeration of GO nanoparticles in the SPEEK membrane. The prepared nanocomposite membranes exhibited better water retention properties and proton conductivity. The proton conductivity of the SPEEK membrane with 2 wt% amine functionalized GO (AGO) reached 11.32 mS/cm at 120 °C, which was 2.45-times higher than that of the pristine SPEEK membrane. The reason was that AGO nanoparticles disperse uniformly in the SPEEK membranes, which provides new channels for proton transfer. The potential application of this composite membrane in the PEMFC was indicated.

中文翻译：

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通过加入（3-氨基丙基）三乙氧基硅烷接枝的氧化石墨烯提高磺化聚（醚醚酮）膜在高温下的质子传导性

为质子交换膜燃料电池 (PEMFC) 制造具有高质子传导性的廉价质子交换膜仍然是一个具有挑战性的问题。制备了接枝有（3-氨基-丙基）三乙氧基硅烷（APTES）的氧化石墨烯（GO）纳米颗粒，然后通过溶液浇铸将其掺入磺化聚（醚醚酮）（SPEEK）基质中，制成复合质子交换膜。通过XRD、FT-IR、拉曼、TGA、SEM和UTM对获得的纳米颗粒和复合膜进行表征。用硅烷偶联剂处理的GO提高了GO在SPEEK中的分散稳定性和相容性，从而减少了GO纳米颗粒在SPEEK膜中的团聚。制备的纳米复合膜表现出更好的保水性能和质子传导性。具有 2 wt% 胺官能化 GO (AGO) 的 SPEEK 膜的质子电导率在 120°C 下达到 11.32 mS/cm，是原始 SPEEK 膜的 2.45 倍。原因是 AGO 纳米粒子均匀地分散在 SPEEK 膜中，这为质子转移提供了新的通道。表明了这种复合膜在 PEMFC 中的潜在应用。