▎ 摘　　要

Graphene/polyaniline multilayered nanostructures (GPMNs) are prepared using a straightforward process through which graphite is physically exfoliated with quaternary polyaniline (PANI)-glue. This is only accomplished by sonication of the graphite flakes in an organic solvent to form continuous films with PANI. During the sonication, the conductive PANI-glue is spontaneously intercalated between the graphene sheet layers without deterioration of the sp(2) hybridized bonding structure. The resultant free-standing, flexible films are composed of a network of overlapping graphene sheets and are shown to have a long-range structure. The effects of different PANI content ratios and different interfacial energies (depending on the dispersion solvent) on the morphology and properties of the resulting GPMN are examined. It is found that GPMNs dispersed in water have a maximum specific capacitance of 390 F g(-1) in a three-electrode configuration. Importantly, the unique structural design of GPMNs enables their use as electrode materials for the fabrication of flexible, solid-state electrochemical capacitors, which show an enhanced performance compared to graphene-only devices. They exhibit a high specific capacitance of 200 F g(-1), a cycling stability with capacitance retention of 82% after 5000 charge/discharge cycles, and, moreover, superior flexibility.