ISSN 1608-4039 (Print)
ISSN 1680-9505 (Online)


оксид графена

ВЛИЯНИЕ УСЛОВИЙ СИНТЕЗА ВОССТАНОВЛЕННОГО ОКСИДА ГРАФЕНА НА ЭЛЕКТРОХИМИЧЕСКИЕ ХАРАКТЕРИСТИКИ ЛИТИЙ-СЕРНЫХ АККУМУЛЯТОРОВ

Исследовано влияние условий восстановления оксида графена (ОГ) (термическое и гидротермальное мочевиной и тиомочевиной) на свойства восстановленного оксида графена (ВОГ) и электрохимические характеристики литий-серных ячеек (ЛСЯ) с положительными электродами на основе ВОГ. ЛСЯ с ВОГ обладают высокой длительностью циклирования: сохраняют более 40 % емкости после 500 циклов. Однако разрядная емкость ЛСЯ с электродами на основе ВОГ ниже разрядной емкости реперных ЛСЯ с сажей.

Galvanostatic and potentiostatic reduction of multilayer graphene oxide in alkaline electrolyte

The results of the study of electrochemical reduction of multilayer graphene oxide in galvanostatic and potentiostatic modes are presented, the possibility of using the alkaline electrolyte KOH with the concentration of 0.01 M is shown. The identification of electrochemically reduced graphene oxide was carried out by XRD analysis, IR and Raman spectroscopy.

Electrochemical reduction of multilayer graphene oxide in alkaline electrolyte

The results of the study of the electrochemical reduction of multilayer graphene oxide in the potentiostatic mode are presented and the possibility of using alkaline electrolyte (KOH) with the concentration below 0.1 M is shown. The identification of the electrochemically reduced graphene oxide was carried out using the XRD, FTIR and Raman-spectroscopy methods. Applying the method of Raman spectroscopy the increase in the intensity of the G and 2D bands, indicating the formation of few-layer forms of reduced graphene oxide was found.

Supercapacitor based on electrochemically reduced graphene oxide

This article show results of research work which focused on a new electrodes for symmetrical supercapacitor which made from electrochemically reduced graphene oxide films.

Reduced Graphene Oxide Spheres as Active Materials for Lithium Ion Rechargeable Battery Anode

This article show results of research work which focused on a new active materials for lithium ion rechargeable battery anode – reduced graphene oxide spheres, which made by blending of two liquids – hot vacuum oil in graphene oxide water dispersion, with subsequent reduction formed graphene oxide spheres in heated to 200°C vacuum oil. Investigated surface morphology, chemical bond structure and cyclic voltammetry of reduced graphene oxide spheres. Graphene oxide spheres show capacity 185 mA?h/g throughout 50 charge/discharge cycles.

Electrode material based on multilayer graphene oxide for chemical current sources

The results of the studies of the electrochemical synthesis of multilayer graphene oxide were presented, and the possibility of using it as an electrode material of the supercapacitor was shown. In an alcohol suspension the thickness of the particles of multilayer graphene oxide was less than 0.1 μm with an area of more than 100 μm2. The graphene oxide-based electrode has a high specific capacity of 107 F⋅g-1 and a high charge retention rate of 97% after 5000 cycles.