▎ 摘　　要

In electrochemical exfoliation, the working electrode is typically a graphite rod or foil, or highly oriented pyrolytic graphite. These electrodes are limited by the surface area that is in contact with the electrolyte and available for exfoliation. In contrast, a powder-based carbon material will have a much larger surface area exposed to the electrolyte, thus leading to an efficient exfoliation process and faster production of graphene. Herein, we have demonstrated the synthesis of few-layer graphene-like (FLG) sheets from carbon black widely available as a fine powder in its native form. It is challenging to run an electric current through a powdery material. Thus, we proposed to bind the carbon black particles together using a pH-independent intrinsically electrically conducting polymer to form a porous working electrode. Raman spectroscopy confirmed the synthesis of FLG from powder-based carbon black. The thickness of our FLG sheets was determined by atomic force microscopy to be between 3 and 8 nm. Transmission electron microscopy revealed that the sheets were similar to 35 nm in length and similar to 30 nm in width, similar to the particle size of the carbon black (similar to 50 nm in diameter) starting material. The synthesized FLG was compared to industry standards and found to be of excellent quality. Glass coated with our FLG has a transparency of 85-90% in the 300-to 1000-nm wavelength region. The present study serves as a foundation for the electrochemical synthesis of graphene from various carbonaceous powders generated by many industries.