酚醛树脂基活性炭微球的电化学性能II.作为EDLC电极材料的活性炭微球的制备及电化学性能

Phenolic resinbased activated carbon microbeads were used as the electrode materials for electric doublelayer capacitors（EDLC）in an aqueous electrolyte. The electrochemical behavior of the EDLC was investigated by the constant current cycling method. It was found that activated carbon microbeads with high specific capacitance could be prepared by steam activation at 800℃ for 1h using an activating agent containing 40% volume of steam. The obtained activated carbon microbeads had a specific capacitance of 143F/g, and had excellent chargedischarge properties with a cycling efficiency up to 98%. Mesopores of 2-7.5nm had a remarkable influence on specific capacitance.