表面活性剂真空浸渍活化超级电容器用活性炭研究

摘要

The activated carbon ( AC) is treated by vacuum impregnation using various surfactant .The acti-vated carbon treated with surfactant is characterized by Fourier transform infrared spectroscopy , thermal gravity analytical , and electrochemical measurements .The enhancement in electrochemical performance of treated AC e-lectrode is mainly attributable to improvement in wettability and ion mobility , resulting in a higher usable surface area and a smaller internal resistance .The AC electrode supercapacitor treated with sodium dodecylbenzene sul-fonate exhibits the best electrochemical performance .Specifically, its specific capacity by the 143.2 F· g -1 in-creased to 196.8 F· g -1 , internal impedance by the 1.75Ωreduced to 0.71Ωand maximum power density by the 6035.7 W· kg -1 increased to 9380.2 W· kg -1 .%采用不同种类表面活性剂对活性炭进行真空浸渍活化．通过红外光谱、热失重分析和电化学性能评价对处理前后的活性炭进行研究．结果表明，表面活性剂处理活性炭，可明显提高活性炭的有机电解液可润湿性，增加其比表面积利用率，改善活性炭电极的黏结性能．十二烷基苯磺酸钠处理后的活性炭电极，比电容由143．2 F· g -1提高到196．8 F· g-1，内阻由1．75Ω降低到0．71Ω，最大功率密度由6035．7 W· kg-1增加到9380．2 W· kg -1．