The unique properties of Graphene-based nanocomposites have attracted numerous investigations in the field of materials science from supercapacitors to drug delivery applications. Graphene has received attention as a probe or electrode material source for supercapacitors because it consists of low electrical resistance, large electrolyte accessibility based on the larger surface area and chemical stability. The extra properties of graphene show some promising application such as optical electronics, composites and others. Supercapacitors are able to store more energy and can be fully charged / discharged at high speeds. This review has been mainly focused on the following points namely synthesis route of Graphene which consists of Bottom-Up and Top-Down approaches, are more difficult and hindering the massive production of graphene. We have also discussed the different techniques utilized for the synthesis of reduced graphene oxide namely thermally, hydrothermally, partially and electrochemically reduced graphene oxide and its electrochemical behavior. Analysis of these results inferred the specific capacitance in the range of 220,223.6, 225 and 230 F/g (acid and neutral). The characterization of Graphene/Nanocomposites by RAMAN, FTIR, SEM and TEM analysis were also reviewed and found to be suitable for supercapacitors. In this review, the current development of the synthesis route of graphene oxide and its composites with future prospects is presented and discussed.
In this present work, microporous functional carbon is prepared by a single step pyrolysis method of dried SargassumWightiiseaweeds (SW) as crushed powder without activation and tested for supercapacitors. Although the complete study presented here on seaweeds of SargassumWightii(SW), the synthesis technique is standard and relevant to most forms of dried biomass. The morphological studies were characterized by X-ray diffraction (XRD), Energy dispersive X-ray spectroscopy (EDS), Raman spectroscopy (RAMAN), field emission scanning microscopy (FE-SEM) and Fourier-transform infrared spectroscopy (FTIR). The behaviour of the functional carbon were performed by using cyclic voltammetry (CV), galvanostatic charge and discharge (CD) and Impedance analysis. In aqueous electrolyte (1M H2SO4), by using three-electrode system shows highest capacitance of 354 F/g. Furthermore, it was observed that the carbonized temperature has significant role in the electrochemical performance, as the carbonized sample at 700°C showed best activity compared to the samples carbonized at 800°C and 900°C without any external activation. The electrochemical act obviously shows that the carbon produced from dried SW seaweeds can be used as a favourable material for electrodes in the application of supercapacitors.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.