▎ 摘　　要

Two-dimensional membranes with nanofluidic channels and a high chemical stability are strongly needed in many practical applications. We present a facile vacuum filtration method to fabricate a lamellar hybrid microstructure with cellulose nanofibers and graphene oxide sheets. The flexible and free-standing composite membrane obtained has uniformly distributed interstitial voids that provide nanofluidic channels for ion transport. The systematic measurement of the ionic currents through the nanofluidic channels with various electrolytes at different concentrations establish the surface-charge-governed ion-transport behavior. The ionic conductivity through the nanofluidic channels at lower concentrations (