Preparation of Activated Carbon for Electric Double Layer Capacitors

摘要

Mesophase activated carbon (MAC) was prepared from coal tar pitch derivated Green Mesophase Powder (GMP) by chemical activation with potassium hydroxide (KOH). The influences of the activation temperature and the activation time on the pore properties were investigated. The trends of the parameters were also analyzed. By using the optimized parameters, the Brunauer-Emmett-Teller (BET) surface area of the obtained activated carbon reached 2838 m~2 /g and the pore volume was increased to 1.31 cm~3 /g. The adequacy of the trend for predicting the optimum values were verified effectively by the validation. The activated carbon electrode made from MAC showed an excellent electrostatic capacitance with 196F/g and 72F/cm~3.