COMPOSITE CARBON RIBBON FOR SUPERCAPACITORS ELECTRODES

Abstract

The paper considers the issues related to the development of production technology of composite carbon ribbon (CCR) which is the basis for supercapacitors’ electrodes. It also presents the results of comprehensive experimental electrochemical and electro energy research in both - CCR and electrodes, based on CCR and supercapacitors models with stacked and winded structure with the use of such electrodes. The structure of composite electrodes based on activated carbon, electro conductive additive and polymer binder was examined by scanning electronic microscopy. Specific square area of electrodes surface and carbon material pores size was defined by the method of N2 absorption. Electro chemical characteristics of composite electrodes were studied depending on the type of applied current collector. It was established that for non-watery electrolyte 1 M TEABF4/PC, minimal full internal resistance of 7.2 Ohm/cm2 and maximal specific electric capacitance80 F/g are possessed by the electrodes based on CCR glued on current collector by means of electro conductive adhesive. The electrodes demonstrate stability after 1000 cycles of galvanostatic charge/discharge. Basing on the fabricated composite electrodes, models of stacked and winded supercapacitors were built and main parameters of their electric-energy characteristics were studied.