Evaluation of materials for electrodes in electrochemical capacitors (EC) used in electric hybrid vehicles

Electrochemical capacitors are charge storing-discharging devices used in conjunction with power sources like batteries or Fuel Cells. Electrochemical capacitors are placed in between the positions of batteries and ordinary capacitors based on their energy density and power density. Electrochemical capacitors are occupying a niche position in the category of load leveling of power sources in Electric Vehicles. Application of these electrochemical capacitors is also extended into consumer electronic items. Parameters affecting the performance of these capacitors like the energy and power densities that they would deliver among other conditions like efficiency, life, costs etc. are dealt in this paper. The feasibility and the use of active materials, electrolytic medium and scan rate affecting the performance of the electrochemical capacitors are presented in this work.