Abstract We investigated the effect of graphene oxide (GO) and sulfonated polytriazole grafted graphene oxide (SPTA-GO) on sulfonated poly(arylene ether sulfone) (SPAES) based polymer electrolytes for application in proton exchange membrane fuel cells. GO was fabricated by the chemical oxidation of graphite and SPTA-GO was prepared via the click reaction using copper (Ⅰ) catalyzed azide-alkyne 1,3-dipolar cycloaddition between ethynyl-terminated sulfonated polytriazole (E-SPTA) and azide functionalized GO (N3-GO). All the SPAES based composite membranes with GO and SPTA-GO revealed better physical/chemical stabilities and mechanical strength than the pristine SPAES membrane, while noticeable improvement of proton conductivity was only observed in the SPAES composite membrane with SPTA-GO since the SPTA moiety attached on GO has both sulfonic acid and triazole groups that can introduce the additional proton conducting channels into the SPAES matrix. The maximum power density of the membrane electrode assembly employing the SPAES composite membrane with SPTA-GO reached up to 1.58 W cm−2 at 80 °C and 100% RH condition, which is larger than that employing commercial Nafion 212 (1.33 W cm−2).

中文翻译：

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具有磺化聚三唑接枝氧化石墨烯的磺化聚亚芳基醚砜复合膜用于高性能质子交换膜燃料电池

摘要 我们研究了氧化石墨烯 (GO) 和磺化聚三唑接枝氧化石墨烯 (SPTA-GO) 对磺化聚亚芳基醚砜 (SPAES) 基聚合物电解质的影响，用于质子交换膜燃料电池。GO通过石墨的化学氧化制备，SPTA-GO通过使用铜（Ⅰ）催化的乙炔基封端磺化聚三唑（E-SPTA）和叠氮化物功能化GO之间的叠氮化物-炔烃1,3-偶极环加成反应制备SPTA-GO（ N3-GO）。所有具有 GO 和 SPTA-GO 的基于 SPAES 的复合膜显示出比原始 SPAES 膜更好的物理/化学稳定性和机械强度，而质子传导性的显着改善仅在带有 SPTA-GO 的 SPAES 复合膜中观察到，因为连接在 GO 上的 SPTA 部分具有磺酸和三唑基团，可以将额外的质子传导通道引入 SPAES 基质。使用带有 SPTA-GO 的 SPAES 复合膜的膜电极组件在 80°C 和 100% RH 条件下的最大功率密度达到 1.58 W cm-2，大于使用商用 Nafion 212（1.33 W cm-2） 2）。