Co3O4/碳纳米管复合膜的超级电容器性能

Co3O4/Carbon Nanotube Composite Film for Supercapacitor and Its Performances

采用电泳沉积法在镍片上沉积Co3O4/碳纳米管(CNT)复合膜。利用XRD、SEM和TEM对Co3O4/CNT复合膜进行物性分析,利用循环伏安和恒流充放电测试表征电容性能。研究表明在CNT表面成功包覆了一层Co3O4壳层,形成独特的核/鞘纳米电缆结构。电化学测试表明,Co3O4/CNT复合膜电极具有较好的电容性能,在充放电电流密度为0.5 mA/cm^2时,比电容高达282 F/g;增加电流密度到15 mA/cm2时,比电容为209 F/g,并具有优异的循环稳定性。

Co3O4/carbon nanotube(CNT)composite film was deposited on nickel foil by electrophoretic deposition. The physical properties of the Co3O4/CNT composite film were investigated by XRD,SEM and TEM tests. The electrochemical capacitive performances were checked by cyclic voltammetry and galvanostatic charge/discharge tests. Results showed that Co3O4 particles were successfully coated on the sidewall of CNT,resulting in unique core/sheath nanocable structure. Electrochemical tests proved that the excellent capacitive performances were achieved. A high capacity of 282 F/g was achieved at 0.5 mA/cm^2,and when the current density was increased to 15 mA/cm2,the specific capacitance was 209 F/g with excellent cyclic stability.