活性炭活化时间对其电化学性能的影响

Effect of the Activated Carbon Reactivation Time on Its Electrochemical Apacitance

研究了以棉杆为原料,采用KOH化学活化法制备超级电容器活性炭电极材料。用SEM进行表征,恒流充放电,循环伏安法、交流阻抗研究其电化学性能。棉杆基活性炭电极材料组装成纽扣式双电层电容器,其在2 A/g的电流密度下的放电比容量能够达到180 F/g。对于电化学电容器电极材料而言,棉杆基活性炭不仅有着良好的电化学性能,而且价格低廉,来源广泛,具有广阔的开发应用前景。

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.