Performance of Electric Double Layer Capacitors Using Annealed Activated Carbons from Phenolic Resin As Electrodes

The effect of annealing at different temperatures on the structure and electrochemical performance of the activated carbon material derived from phenolic resin is studied. Annealing the carbon material up to 1800 °C increased the electric conductivity of the activated carbon from 2.6 to 8.3 S/cm. The electrochemical performance analysis of the annealed carbon materials as electrodes in electric double layer capacitors with organic electrolyte revealed that the thermally treated carbon materials deliver greater power densities (up to 30 kW/kg) at high currents. Moreover, the annealed carbon electrodes showed better capacitance retention at high current densities.