高比表面活活性炭电级的电化学性能研究

选用比表面积为2590m^2/g的石油焦基活性炭作为双电层电容器的炭电极材料，用直流恒流循环实验考察双电层电容器在不同允放电条件下的电化学性能。实验发现，活性炭电极具有良好的循环充放电性能，充放电效率高达97％，远高于普通电池。不同充放电电流有不同的充放电容量，恒流1mA充放电容量大于2mA和5mA时的充放电容量。活性炭的比电容为60F／g，且电化学性能稳定，有良好的应用前景。

STUDY ON THE ELECTROCHEMICAL CHARACTERIZATION OF HIGH SURFACE AREA ACTIVATED CARBON ELECTRODES FOR ELECTRIC DOUBLE-LARYER CAPACITORS

The activated carbon(AC) with BET surface area 2 590 m2/g obtained from petroleum coke was used as the electrode materials for the electric double layer capacitors (EDLC)in an aqueous electrolytic solution. The electrochemical characterization and the double-layer capacitance of AC were investigated using constant current cycling (CCC) methods. It was found that AC electrodes had excellent charge-discharge properties and the efficiency is 97% after 20 cycles which much higher than that of the conventional battery. The EDLC had the different charge-discharge capacities with the different currents and the capacity with 1 mA current was larger than the capacity of 2 and 5 mA. The leakage current and constant power test had also been investigated to prove that AC electrodes had the good application performance.