A RESEARCH ON ELECTRODE APPLICATIONS: SYNTHESIS OF NICKEL-DOPED GRAPHENE OXIDE

Abstract

In today's technology, carbon-based materials (such as graphene, graphene oxide, carbon nanotubes, etc.) have become one of the most important research areas due to a large number of applications. Graphene oxide (GO) is being investigated in many applications, especially in the energy field. In this study, GO was synthesized by a modified Hummer’s method. After the synthesis of GO, nickel addition to the struc-ture was made by the hydrothermal method. The morphological and structural prop-erties of the synthesized GO were characterized by scanning electron microscope (SEM), X-ray powder diffraction (XRD) and Brunauer–Emmett–Teller (BET). Ac-cording to the BET results, the surface areas of untreated GO and Ni-doped graphene oxide after heat treatment at 360°C (Ni-doped GO 360) were calculated as 3.22 m2 g-1 and 228 m2 g-1, respectively. Electrochemical properties of GO and Ni-doped GO 360 were analyzed using cyclic voltammetry (CV), long term charge/discharge analysis and impedance spectroscopy. At the end of 1000 cycles, it was determined that the Ni-doped GO 360 electrode retained 76% of its initial capacitance.

Keywords

• Electrochemical properties
• electrode
• graphene oxide
• modified Hummers method

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