BigPatents India

Supercapacitors or Electrochemical capacitors are a class of high rate energy storage/discharge devices, which use electrolytes and electrodes of various kinds, in a system similar to that of conventional batteries. The use of conducting polymer materials for redox supercapacitors ahs several advantages over other system. In addition, good specific capacitance can be obtained and existing battery type technology for fabrication procedures may be used. Among them, polyaniline has attracted much attention because of higher environmental stability, controllable electrical conductivity and easy processability. Further, the porosity and surface area of polymer/electrolyte generally depends on the redox state of polymer as this features can be exploited to produce high energy density electrodes for supercapacitor. We have synthesized polyaniline thin films by electrochemical anodization at constant potentials. Electrochemical capacitor was formed with H2SO4 solution. The specific supercapacitance of 650 F/g and interfacial capacitance of 0.14F/cm2 were obtained. Drawing: 02 Sheets. Total Pages: 13. Fig. Nil