GRAPHENE OXIDE SYNTHESIS WITH DOMESTIC MASS SEGMENT REAGENTS FOR THE SUPERCAPACITOR ELECTRODES

The supercapacitors development with high specific energy and capacity is an actual task, the solution of which is necessary for further progress in alternative energy, electric and unmanned transport. Since the capacitance of supercapacitors is directly related to the specific surface area of the electrodes, there is active studying of promising carbon-containing materials introduction, among which graphene oxide has a most interest. Despite the extensive graphene oxide researches in recent years, its practical application is hindered by insufficient knowledge of the graphite to graphene oxide oxidation mechanism. It does not allow to fully consider of all factors that have influence on technological processes. In this paper, there has investigated the effect of reduced purity requirements for the domestic production reagents on the reproducibility of morphological and structural characteristics. The multiple synthesis of graphene oxide based on the modified Hummers method was carried out for the properties characterization. There were analyzed the general structure and surface morphology (scanning electron microscopy), the elemental composition (energy dispersive X-ray spectroscopy) and the structural composition (X-ray diffractometry). The influence of the synthesis conditions on the oxidation degree and micrometer-scale surface morphology has been revealed. At the same time, the influence degree is insignificant and can be improved by the third oxidation stage modification, if necessary. The elemental and structural analysis data showed a high degree of reproducibility of the oxidation process and the formation of pure graphene oxide phase. A comparison with world's leading works data allows to conclude insignificant contribution of the mass segment domestic reagents on the characteristic’s changes. The obtainable graphene oxide can be used for supercapacitors production with enhanced specific capacitance.