A systematic investigation on the effect of Reducing Agents towards Specific Capacitance of NiMg@OH/ Reduced Graphene Oxide Nanocomposites

ABSTRACT

In this work, NiMg@OH/reduced graphene oxide (rGO) nanocomposites are synthesised through microwave-assisted synthetic methodology using various reducing agents. The structural features and surface morphology of synthesised materials are fully examined with different spectroscopy and microscopy techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-visible spectroscopy (UV-Vis), Raman and Fourier Transform Infrared (FT-IR) spectroscopy. Further, this material was subjected to cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques for the systematic study of the properties and impact of reducing agents at various percentages of rGO on the specific capacitance of synthesised materials. The presence of rGO gradually improves the charge transfer process at the electrode/electrolyte interface. Among these nanocomposite materials, maximum specific capacitance of 650.31 F/g was observed for [email protected] wt% rGO synthesised using NH₄OH reducing agent in 6 M KOH electrolyte. Hence, the result signifies these composite materials are a promising candidate for supercapacitor applications.

KEYWORDS:

• NiMg hydroxides
• reduced graphene oxide
• supercapacitors
• microwave assisted synthesis
• nanocomposites

Acknowledgments

The authors gratefully acknowledge the financial support for the project (File No: SP/YO/2019/1599(G)) through SYST division of Department of Science and Technology, Government of India, New Delhi.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This research is funded by Department of Science and Technology, through the DST SYST division with grant number SP/YO/2019/1599(G) at New Delhi.