Production of Carbonaceous Materials with High Capacitance by Electrochemical Technique

Abstract

Electrochemical supercapacitors are widely investigated as energy storage devices. The major part of research is dedicated to electrode materials development. Herein, we describe an electrochemical synthesis of 6 carbon-based materials from graphite. Influence of synthesis parameters (temperature and distance between electrodes) on resulting materials was investigated. The materials were tested to be used as electrode material in electrochemical energy storing system with phosphate buffer (pH=7) as supporting electrolyte. Resulted system showed a good stability and high operating voltage range (0-1.1 V). The higher and most stable specific capacitance of discharge was shown for a system there the material obtained at 80 degrees C and 3 cm of distance between electrodes was used as an electrode material (207 F g(-1) and 23% after 200 cycles, respectively).