The concentration effects of the conductive fillers in the carbon-carbon electrodes of the electrochemical capacitor

Abstract

Recent experimental results on the electrical and electrochemical properties of carbon-carbon electrodes of electrochemical capacitors (supercapacitors) are discussed. The dependence of electronic conductivity, specific capacity and the equivalent series resistance on the concentration and nature of the conductive filler is revealed: carbon black PA-76, carbon fibers VGCF grown in vacuum. It is established that the capacity of the electrical double layer formed on the high extended surface area of carbon-carbon electrode material of electrochemical capacitor obtain a maximum value of 115 F / g at a concentration of conductive filler 15%. The equivalent series resistance does not depend on the concentration and nature of the conductive filler and electrical contact is defined on the boundary of the electrode material / current collector.