高性能超级电容器有序中孔炭材料的研制

Preparation of high performance ordered mesoporous carbon as the electrode material for supercapacitor

采用微湿含浸法制备了一系列具有不同比表面积和孔径分布的超级电容器有序中孔炭材料。采用液氮吸附脱附等温线、小角XRD以及TEM表征了有序中孔炭的孔结构,在1MEt4NBF4|PC电解液中测试了其电化学性能。结果表明,所制得的有序中孔炭的BET比表面积随糠醇加入量的增加先增加后减小,糠醇加入量少制得具有CMK-5结构的有序中孔炭,加入量多制得的CMK-3结构。电化学性能测试结果表明,在1mA·cm-2的充放电电流密度下各有序中孔炭材料比电容的大小顺序与其BET比表面积的大小顺序基本一致,具有CMK-3结构的有序中孔炭的倍率性能最好,并且也好于无序中孔炭的。

A series of ordered mesoporous carbons used as electrode material for supercapacitor with different surface area and pore size distribution were prepared by incipient wetness impregnation method. N2 adsorption and desorption isotherms, small angel XRD and TEM were used to characterize the pore structure of the ordered mesoporous carbons, and the electrochemical performances of the ordered mesoporous carbon materials were tested in 1 M EtaNBF4 I PC electrolyte. The results show that the BET surface area of the ordered mesoporous carbons increase at first and decrease afterwards with the increase of the amount of the furfuryl alcohol added, and ordered mesoporous carbon with CMK -5 structure was prepared with less amount of the furfuryl alcohol added, whereas that with CMK - 3 structure was synthesized with more amount of the furfuryl alcohol added. The results of electrochemical characterization show that the magnitude order of the specific capacitance of the ordered mesoporous carbons is almost in good agreement with that of the BET surface area at the charge - discharge current density of 1 mA · cm ^-2. The rate capability of the ordered mesoporous carbon with CMK - 3 structure is found to be the best, and it is also better than that of disordered mesoporous carbon.