Preparation and Characterization of a Flexible rGO-PTFE Film for a Supercapacitor Current Collector.

A mixture of water suspensions of graphene oxide (GO) and polytetrafluoroethylene (PTFE) was used to make the films GO-PTFE (50:50). They became conductive (2.0-2.8 S/cm) while maintaining flexibility after reduction with hydrazine and subsequent annealing at 370 °C. The structure and morphology of the reduced films (rGO-PTFE) are examined in detail by means of a number of techniques such as SEM, AFM, XPS, Raman, and contact angle wetting. The results of the films testing as current collectors in metal-free supercapacitor with electrodes from microwave exfoliated graphene oxide and an acid (1 M H2SO4) electrolyte are presented.