以化学气相沉积法，利用硅藻土作为天然催化剂，制备出三维石墨烯/碳纳米管复合材料，通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)和比表面及孔径分析(BET)等方法对材料的形貌和孔径分布进行表征.研究了复合材料在1 mol/L H2 SO4电解液中的超级电容器电化学性能.循环伏安测试结果表明，在扫描速率为2 mV/s时，三维石墨烯/碳纳米管复合电极在1 mol/L H2 SO4电解液中的比电容达到110 F/g.50 mV/s扫描速率下，复合电极稳定循环10000次容量保持稳定.
Three-dimensional (3D)/carbon nanotube composite materials were fabricated by chemical vapor dep-osition method using diatomite as templates.The morphology,surface area and pore size distribution of the 3D graphene/carbon nanotube composite materials were investigated by scanning electron microscopy,transmission electron microscopy and brunauer-emmett-teller measurement (BET),respectively.The electrochemical prop-erties of the supercapacitor in H2 SO4 electrolyte were evaluated by cyclic voltammetry (CV)techniques.It was found that the supercapacitor exhibited an outstanding specific capacitance value of 110 F/g in 1 mol/L H2 SO4 electrolyte at a scan rate of 2 mV/s,and the capacitors stay stable with 10 000 cycles at 50 mV/s.
参考文献
| [1] | Chunming Niu;Enid K. Sichel;Robert Hoch.High power electrochemical capacitors based on carbon nanotube electrodes[J].Applied physics letters,19979/12(9/12):1480-1482. |
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