A composite based on multi-walled carbon nanotubes and manganese oxide doped with silver oxide, promising as an electrode material for supercapacitors, has been obtained and studied. The structure and composition of the composite and electrodes obtained on its basis were studied by scanning electron microscopy and X-ray photoelectron spectroscopy. Using potentiostatic and galvanostatic methods, the characteristics of electrodes based on the composite, as well as combinations of the composite and commercial highly dispersed carbon black (CB) in various ratios, were studied. The most optimal characteristics were obtained for combined electrodes with CB contents of 20 and 30 wt.%: the specific capacitance values were ~145-130 F/g at a discharge current density of 0.1 A/g, maintaining 65% of this value when increasing the discharge current density to 1 A/g. Based on the analysis of morphology and electrophysical characteristics, it is shown that high electrochemical characteristics of combined electrodes are achieved through a combination of high electrochemical activity of the composite, as well as the electrical conductance and porosity of carbon black. Keywords: conductivity, specific capacitance, redox reactions, electrochemical characteristics, X-ray photoelectron spectroscopy.

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Дата начала обработки статистических данных - 27 января 2016 г.