Effect of the Activated Carbon Reactivation Time on Its Electrochemical Apacitance

th , 2012; revised: Dec. 20 th , 2012; accepted: Dec. 30 th , 2012 Abstract: A new activated carbon with high specific capacitance and low cost was prepared employing cotton stalk as the raw material by using KOH chemical activation method. The physical characterization of activated carbon was conducted by using Scanning Electron Microscopy (SEM). The supercapacitor was charged and discharged on the charge/discharge apparatus (BTS-51, Neware, China). CV and EIS were tested using a CHI660 electrochemical work- ing station. The capacitance of the prepared activated carbon was as high as 180 F/g. The results indicate that cotton stalk can produce activated carbon electrode materials with low cost and high performance for Electric Double Layer Capacitor (EDLC). It is a potential raw material for the preparation of activated carbon.