采用水热组装法制备了碳纳米管/氮掺杂多孔碳复合电极材料.通过扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)、拉曼光谱(Raman)、N2吸附-脱附(BET)和X射线光电子能谱(XPS)表征了复合材料的微观形貌和结构;并采用循环伏安法、恒流充放电和交流阻抗谱测试了复合材料的储能特性.结果表明,水热组装法成功地合成了具有高比表面积(1 039 m2/g)的碳纳米管/氮掺杂多孔碳复合材料.并且该复合材料表现出优异的储能特性,在1 A/g下,其比电容高达261 F/g,远远高于氮掺杂多孔碳(214 F/g)和碳纳米管(109 F/g)的比电容;在功率密度为10 500 W/kg下其能量密度仍为53.75 Wh/kg.
In this paper, the carbon nanotubes/nitrogen-doped porous carbon (ACNTs@NPC) composite was fabricatedvia a novel hydrothermal-assembly route.The micro-sized morphology and structureof ACNTs@NPC composite were determined by SEM, TEM, XRD, Raman, XPS and BET methods.Theenergy storage properties were measured via CV, GCD and EIS methods.The result indicated that ACNTs@NPC composite with high surface area (1 039 m2/g)has been successfully synthesized by hydrothermal-assembly process.The ACNTs@NPCcomposite shows excellent energy storage properties of a high specific capacitance of 261 F/g at 1A/g, which is much higher than that of ACNTs (109 F/g) and NPC(214 F/g) materials, and a high energy density of 53.75 Wh/kg at a high power density of 10 500 W/kg.
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