Preparation and characterization of carbon-based nanostructured materials for advanced electrochemical Capacitors

Abstract

Functionalize spongy graphene was prepared by using Spongy graphene oxide (SGO) containing different functional groups, with Adenine act as ligands were investigated. The ligands containing amino group can be attached with carboxylic group. The results show the formation of complexes with Adenine. Functionalized Graphene oxide (FGO) react with silver nitrate at different ratio 100:10, 100:15, 100:25 ratio in the composite. The composition of graphene and silver nanoparticles containing 100:15 ratio in the composite was found to have maximum synergistic effect resulting in the highest capacitive property than the other ratios. FGO constituents react with HTIO2 at different ratio 100:10, 100:20, 100:25 and 100:30 ratios in the composite. The composition of graphene and hydrogenated Titanium Nano tubes containing 100:20 ratio in the composite was found to have maximum synergistic effect resulting in the highest capacitive property than the other ratio. Functionalized N/P co-doped graphene was prepared by using spongy graphene oxide with guansine monophosphate. The fabricated materials were characterized by X-ray diffraction (XRD), FTIR, scanning electron microscopy (FESEM), Raman spectroscopy, thermogravimetric analysis (TGA), UV−vis absorption spectroscopy, and transmission electron microscopy (TEM). The synthesized materials have been evaluated as supercapacitor materials in 0.5M H2SO4 using cyclic voltammetry (CV) at different potential scan rates, and galvanostatic charge/discharge tests at different current densities.