Facile synthesis of cobalt oxide and graphene nanosheets nanocomposite for aqueous supercapacitor application. (April 2022)

• Record Type: Journal Article
• Authors: Lakra, Rajan; Kumar, Rahul; Sahoo, Prasanta Kumar; Sharma, Deepanshu; Thatoi, Dhirendranath; Soam, Ankur
• Is Part Of: Carbon trends. Number 7(2022)
• Publication Date: 2022-04
• Subjects: Cobalt oxide -- Graphene -- Nanocomposite -- Electrode -- Supercapacitor; Carbon -- Periodicals; Carbon composites -- Periodicals; Carbon; Carbon composites; Periodicals; 620.193
• DOI: 10.1016/j.cartre.2021.100144
• Languages: English
• ISSNs: 2667-0569

Abstract

Highlights: Cobalt oxide (CO3 O4 )/graphene nanocomposite has been synthesized. The properties of the nanocomposite was examined using XRD, SEM and TEM. The electrode exhibited specific capacitance of 140 F/g (28 mF/cm 2 ). Energy density was determined to be 2.4 to 9.8 Wh/kg with power density of 0.3 to 0.8 kW/kg. Abstract: The present work includes the fabrication and electrochemical characterization of cobalt oxide (Co3 O4 )/graphene nanosheets nanocomposite as efficient electrode for supercapacitor application. The characterization techniques involved in this work are scanning electron microscopy and transmission electron microscopy for surface morphology, Raman spectroscopy and X-Ray diffraction for structural analysis. The specific capacitance of Co3 O4 with multilayer graphene nanocomposite was determined to be 140 F/g (28 mF/cm 2 ) at scan rate of 20 mV/s. The composite electrode can deliver a power density of 856 W/kg with maintaining energy density of 2.38 Wh/kg. The better performance is due to the synergistic effect of graphene and Co3 O4 in the composite. Graphical abstract: Image, graphical abstract