Ultrathin sheet structure Ni-MoS2 anode and MnO2/water dispersion graphene cathode for modern asymmetrical coin cell supercapacitor

New composite electrodes were made from Ni-doped molybdenum disulfide (Ni-MoS2) with the help of anode electrode, through electrochemical synthesis procedure. Water Dispersible Graphene-MnO2 nanomaterials and cathode electrodes were synthesised with the help of a reflux technique. In addition to this, the prepared materials were comprehensively characterised by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, atomic force microscopy, particle size analyser and Raman spectroscopy studies. The anode and cathode were prepared respectively using the prepared Ni-MoS2 and water dispersible graphene-MnO2 nanocomposites. The prepared asymmetrical electrodes were used to construct the 2023 coin cell supercapacitor with polypropylene as a separator and Na2SO4 as a gel electrolyte. The electrochemical performances of an asymmetrical supercapacitor as well as the half-cell studies of Ni-MoS2 nanocomposite were carried out at room temperature. The present study confirms that the energy and power density of the earlier mentioned supercapacitor were higher than that of commercial supercapacitors. (C) 2017 Elsevier B.V. All rights reserved.