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Nanocrystalline structured of NiO/MnO2@Nitrogen-doped Graphene oxide hybrid nanocomposite for high performance supercapacitor

Abstract

Nitrogen doped Graphene oxide (NGO) has been widely used to investigate active electrode materials for high-performance supercapacitors. The NGO has attracted wide attention due to the efficient method of doping with GO, which can increase the electron mobility, leading to desirable electrochemical properties. Therefore; we focus the present study on the ternary hybrid composite of NiO/MnO2@nitrogen-doped graphene oxide, which was synthesized by a hydrothermal process. The synthesized hybrid nanocomposite was characterized by Raman spectra, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), Energy Dispersive Spectroscopy (EDX), and Field emission resolution transmission electron microscopy (FE–TEM). The structural and morphological properties of the hybrid nanocomposite show nanocrystalline morphology and its electrochemical behaviour.The nanocrystalline hybrid composite exhibited a high specific capacitance of 1,490 F g-1 at a current density of 0.5 A g−1, energy density of 477Wh/Kg, and power density of 1,844WKg–1, together with good rate capability and cyclic stability. The results indicate that the good specific capacitance retention of ca. 98 % after 2,000 continuous charge–discharge cycles indicates the hybrid nanocomposite can be a promising electroactive material for supercapacitors. The improved performance of the NiO@MnO2/NGO electrode structure means that it offers an effective way to fabricate high performance supercapacitors.

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Publication details

The article was received on 29 Sep 2017, accepted on 09 Nov 2017 and first published on 10 Nov 2017


Article type: Paper
DOI: 10.1039/C7NJ03730A
Citation: New J. Chem., 2017, Accepted Manuscript
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    Nanocrystalline structured of NiO/MnO2@Nitrogen-doped Graphene oxide hybrid nanocomposite for high performance supercapacitor

    S. Ramesh, H. S. Kim, J. Kim, H. Kim, K. Karuppasamy and S. Msolli, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ03730A

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