ВЛИЯНИЕ РЕЖИМОВ СИНТЕЗА НА ЭЛЕКТРОХИМИЧЕСКИЕ ХАРАКТЕРИСТИКИ КОМПОЗИТОВ НА ОСНОВЕ МНОГОСТЕННЫХ УГЛЕРОДНЫХ НАНОТРУБОК И ОКСИДА МАРГАНЦА, ЛЕГИРОВАННОГО ОКСИДОМ СЕРЕБРА

Abstract

In this work, promising electrode materials for asymmetric supercapacitors based on multiwalled carbon nanotubes and manganese oxide doped with silver oxide were obtained and studied. To form the composites, the method of exposure of carbon material in an aqueous solution of potassium permanganate with the addition of silver nitrate in various quantities was used. It has been established that an increase in the amount of silver nitrate during the formation of the composite leads to an increase in the mass loading of the composite with both silver oxide and manganese oxide, which provides higher electrochemical characteristics of the material. The maximum specific capacity of the composite with a high content of manganese and silver was about 146 and 65 F/g at discharge current densities of 0.1 and 1.0 A/g, respectively. The high capacitive characteristics of the composite are ensured by a combination of the electrochemical activity of manganese oxide and the low electrical resistance of silver oxide.