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以棕榈树须作为天然碳源和模板,利用化学气相沉积法制备出介孔碳/石墨烯复合材料,研究了复合材料的超级电容器性能。通过扫描电子显微镜、Raman光谱、比表面及孔径分析等对材料的形貌、结构、比表面积和孔径分布进行表征。采用循环伏安和恒电流充放电方法研究了超级电容器在1 mol/L H_2SO_4电解质溶液中的电化学性能。在三电极体系和1 A/g条件下,材料电容达到144 F/g。在二电极体系下,材料电容达到138 F/g,比三电极略有降低。同时,倍率性能优异,20 A/g条件下电容为78 F/g,与三电极体系接近。
Using palm tree as a natural carbon source and template, a mesoporous carbon / graphene composite was prepared by chemical vapor deposition. The properties of the composite were investigated. The morphology, structure, specific surface area and pore size distribution of the materials were characterized by scanning electron microscopy, Raman spectroscopy, specific surface area and pore size analysis. The electrochemical performance of the supercapacitor in 1 mol / L H 2 SO 4 electrolyte solution was studied by cyclic voltammetry and constant current charge-discharge method. In the three-electrode system and 1 A / g conditions, the material capacitance of 144 F / g. In the two-electrode system, the material capacitance reached 138 F / g, slightly lower than the three electrodes. At the same time, the rate performance is excellent, the capacitance is 78 F / g at 20 A / g, close to the three-electrode system.