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Synthesis of a NiMoO4/3D-rGO nanocomposite via starch medium precipitation method for supercapacitor performance
Tarbiat Modares University, Tehran, Iran.
Tarbiat Modares University, Tehran, Iran.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.ORCID iD: 0000-0002-4303-2585
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
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2020 (English)In: Batteries, ISSN 2313-0105, Vol. 6, no 1, article id 5Article in journal (Refereed) Published
Abstract [en]

This paper presents research on the synergistic effects of nickel molybdate and reduced graphene oxide as a nanocomposite for further development of energy storage systems. An enhancement in the electrochemical performance of supercapacitor electrodes occurs by synthesizing highly porous structures and achieving more surface area. In this work, a chemical precipitation technique was used to synthesize the NiMoO4/3D-rGO nanocomposite in a starch media. Starch was used to develop the porosities of the nanostructure. A temperature of 350◦C was applied to transform graphene oxide sheets to reduced graphene oxide and remove the starch to obtain the NiMoO4/3D-rGO nanocomposite with porous structure. The X-ray diffraction pattern of the NiMoO4 nano particles indicated a monoclinic structure. Also, the scanning electron microscope observation showed that the NiMoO4 NPs were dispersed across the rGO sheets. The electrochemical results of the NiMoO4/3D-rGO electrode revealed that the incorporation of rGO sheets with NiMoO4 NPs increased the capacity of the nanocomposite. Therefore, a significant increase in the specific capacity of the electrode was observed with the NiMoO4/3D-rGO nanocomposite (450 Cg−1 or 900 Fg−1) when compared with bare NiMoO4 nanoparticles (350 Cg−1 or 700 Fg−1) at the current density of 1 A g−1. Our findings show that the incorporation of rGO and NiMoO4 NP redox reactions with a porous structure can benefit the future development of supercapacitors. 

Place, publisher, year, edition, pages
2020. Vol. 6, no 1, article id 5
Keywords [en]
Electrochemical performance, NiMoO4 NPs, NiMoO4/3D-rGO nanocomposite, Porous structure, Starch
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:miun:diva-38353DOI: 10.3390/batteries6010005Scopus ID: 2-s2.0-85078484614OAI: oai:DiVA.org:miun-38353DiVA, id: diva2:1391028
Available from: 2020-02-03 Created: 2020-02-03 Last updated: 2020-02-03Bibliographically approved

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