Synthesis of a Novel Magnetite/Nitrogen-Doped Reduced Graphene Oxide Nanocomposite As High Performance Supercapacitor Publisher



Naderi HR¹ ; Norouzi P^{1, 2} ; Ganjali MR^{1, 2} ; Gholipourranjbar H¹ Show Affiliations
Source: Powder Technology Published:2016

Abstract

In this research, magnetite/nitrogen-doped reduced graphene oxide (Fe3O4/NRGO) nanocomposites were synthesized through sonochemical route. The morphology and structure of the synthesized samples were characterized by X-ray diffraction (XRD), X-ray photoemission spectroscopy (XPS), Brunauer–Emmett–Teller (BET) method, field emission scanning electron microscopy (FE-SEM), and Raman spectroscopy. The synthesized nanocomposites display amorphous morphologies, with micro-mesoporous Fe3O4 particles that are uniformly distributed on the NRGO sheets. The electrochemical performance of nanocomposite-based electrodes were evaluated by cyclic voltammetry (CV), galvanostatic charge/discharge, electrochemical impedance spectroscopy (EIS) and continues cyclic voltammetry (CCV). The prepared nanocomposite-based electrodes showed superior supercapacitive performance including good rate capability, high specific capacitance, and excellent cyclic performance. The Fe3O4/NRGO nanocomposite electrodes exhibited specific capacitance of 355 F g− 1 at scan rate of 2 mV s− 1 in 0.5 M Na2SO4 electrolyte, indicating considerable improvement in supercapacitive performance compared with pristine Fe3O4 and magnetite/reduced graphene oxide (Fe3O4/RGO) electrodes. Moreover, in CCV measurements, excellent capacitance retention (97.1%) was also observed for Fe3O4/NRGO nanocomposite during 4000 continuous potential cycling. Therefore, the prepared nanocomposite has great potential as an electrode materials for supercapacitors. © 2016 Elsevier B.V.