Abstract
Novel reduced graphene oxide/magnesium niobate (RGOMN) was synthesized through hydrothermal route and they were characterized through x-ray diffraction (XRD), Fourier-Transform Infrared spectroscopy (FTIR), Fourier Transform Raman spectroscopy (FT Raman), High Resolution Scanning Electron Microscopy (HRSEM), Energy dispersive analysis of x-rays (EDAX) and Thermogravimetry- Differential Scanning Calorimetry (TG-DSC). RGOMN was then approached as an electrode materials for high performance electrochemical super capacitors by cyclic voltammetry (CV) measurements. In particular, the specific surface area of hybrid capacitive RGOMN reaches acceptable oxidation and redox current rate when compared with pseudo-capacitive MN for various scan rate of 10, 20, 30, 40, 60 mVs−1. Thus hybrid RGOMN electrode was obtained with higher specific capacitance than MN at different scan rates . Furthermore, RGOMN electrode furnishes higher discharge time than MN electrode which enables them into use as a part of energy storage devices. A long cycling stability with 60% of capacitive retention after 100 cycles, which is greater than that of the MN (58%) was observed. Ultimately, the high porous graphene nested MN nanocomposite are positive candidate materials for energy storage applications.
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