Synthesis of Highly Reduced Graphene Oxide for Supercapacitor

Abstract

A facile method to synthesize highly reduced graphene oxide in solid phase was developed. The reduced graphene oxide was scarcely prepared in solid phase. Solid substances act as spacers and pillaring agents. Sheets can not be close to each other in reduction process, and sheets agglomeration might not form. After reduction reaction is complete, the spacers and pillaring agents are removed. The average interlayer spacing and surface area of product are bigger than those of reduced graphene oxide. The product has few-layered sheet, and the ratio of carbon to oxygen is high, which might imply that the product is more similar to graphene compared to reduced graphene oxide. The specific capacitance of product is almost three times higher than that of reduced graphene oxide at the same current density.

Binder-free reduced graphene oxide as electrode material for efficient supercapacitor with aqueous and polymer electrolytes

“…During the reduction of GO to rGO, we adopted the solid-phase reduction via sinking and leaving process, which renders the agglomeration of the GO sheets by minimizing the time of interaction for the rGO sheets, as it generally occurs in the case of solution-based reduction methods, where the rGO sheets interact at a faster rate and result in agglomeration. 23 Generally, it is observed that during the solution-phase reduction of GO to rGO, sheets are free to interact with each other, thereby resulting in agglomeration that leads to performance reduction, while the solid-state reduction of the GO also restricts the free movement of the rGO sheets to protect themselves from agglomeration. Thereby, in the present process of fabrication, rGO may use its maximum surface area, which can enhance the performance of the supercapacitor.…”

Synthesis of Reduced Graphene Oxide/Titanium Dioxide Nanotubes (rGO/TNT) Composites as an Electrical Double Layer Capacitor

“…The 24° peak corresponding to (002) diffraction plane indicates that reduction was successful while the 43° peak corresponding to (100) diffraction plane indicates high extent of reduction with interlayer spacing of 0.38 nm and 0.36 nm respectively [ 11 , 17 , 18 ].…”

Preparation and properties of composite materials containing graphene structures and their applicability in personal protective equipment: A Review

“…In connection with the above, we can distinguish methods consisting in the grinding of graphite classified as top-down and regrouping/condensation of carbon atoms classified as bottomup. The main top-down and bottom-up graphene production techniques are: dry graphite delamination [4,5], liquid phase delamination [6,7], growth on silicon carbide [8], chemical gas phase deposition (CVD) [9][10][11][12], epitaxial methods [13], thermal conversion of amorphous carbon and other carbon precursors [14], chemical synthesis [15][16][17][18].…”