Supercritical CO2-assisted preparation of 3D graphene-pyrrole/carbon nanotubes/polyaniline Nanoarchitectures for efficient supercapacitor electrodes

Three-dimensional (3D) graphene-pyrrole/carbon nanotubes/polyaniline (GPCP) nanohybrids were successfully prepared through a facile and scalable method with the assistance of supercritical CO 2 (SC CO 2 ), which could be used as efficient electrode materials for supercapacitors . Our experimental results indicate that SC CO 2 can not only help combining multi-component nanocomposites but also improve the conductivity of the nanohybrids. The electrochemical measurements show that the specific capacitance of the as-prepared nanohybrids with the assistance of supercritical CO 2 can run up to 400   F g −1 , which verify that SC CO 2 provides an effective route to the scalable production of 3D nanohybrids for the potential application in supercapacitors.