Sulfonated poly(ether ether ketone) (SPEEK) is currently considered to be one of the most potential candidates of commercial perfluorinated sulfonic acid proton exchange membranes. Although SPEEK with high sulfonation degree exhibits high proton conductivity, over high content of polar sulfonic groups will lead to over-swelling of membranes, which in turn result in degraded mechanical properties and alcohol resistance. Herein, to balance the overall performance of SPEEK, attapulgite solvent-free nanofluids (ATP-IL) with special flow behavior were prepared for the first time, and then a series of SPEEK/ATP-IL composite membranes were successfully fabricated and evaluated. The grafted organic long-chain ions on the surface of ATP can not only promote the dispersion of ATP in SPEEK matrix, but also endow ATP with proton conduction ability and thus form channel-like proton transport pathway in the composite with the aid of one-dimension shape of ATP. As a result, the composite membranes demonstrated simultaneously improved strength and toughness. Moreover, the maximum conductivity was 50.7 mS cm⁻¹ for the composite membrane with 5 wt% of ATP-IL at 25 °C and 100% R.H., which was 40% higher than that of SPEEK membrane (only 36.4 mS cm⁻¹).

磺化聚醚醚酮（SPEEK）目前被认为是商业全氟化磺酸质子交换膜的最有可能的候选者之一。尽管具有高磺化度的SPEEK表现出高的质子传导性，但是极性磺酸基的含量过多会导致膜的过度溶胀，进而导致机械性能和耐醇性下降。为了平衡SPEEK的整体性能，首次制备了具有特殊流动特性的凹凸棒石无溶剂纳米流体（ATP-IL），然后成功制备和评估了一系列SPEEK / ATP-IL复合膜。ATP表面的接枝有机长链离子不仅可以促进ATP在SPEEK基质中的分散，而且还赋予ATP质子传导能力，并借助ATP的一维形状在复合物中形成通道状质子传输路径。结果，复合膜显示出同时提高的强度和韧性。此外，最大电导率为50.7 mS cm在25°C和100％RH的条件下，具有5％ATP-IL的复合膜的^-1，比SPEEK膜（仅36.4 mS cm ^-1）高40％。