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选用比表面积为２５９０ｍ２／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充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．
The petroleum coke-based activated carbon with a specific surface area of 2590m2 / g was selected as the carbon electrode material for the electric double layer capacitor. The electrochemical performance of the electric double layer capacitor under different charge-discharge conditions was investigated by DC constant current cycling test. The experiment found that activated carbon electrode has a good cycle of charge and discharge performance, charge-discharge efficiency as high as 97%, much higher than ordinary batteries. Different charge and discharge current have different charge and discharge capacity, constant current 1mA charge and discharge capacity is greater than 2mA and 5mA charge and discharge capacity. The specific capacitance of activated carbon is 60F / g, and electrochemical performance is stable, and has good application prospects.