水热组装法制备碳纳米管网状支撑氮掺杂多孔碳材料及其储能特性研究

The netcarbon nanotubessupported nitrogen-doped porouscarbon composite by hydrothermal-assembly method fortheir energy storage properties

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 039m^2/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1A/g下,其比电容高达261F/g,远远高于氮掺杂多孔碳(214F/g)和碳纳米管(109F/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 m^2/g)has been successfully synthesized by hydrothermal-assembly process.The ACNTs@NPCcomposite shows excellent energy storage properties of a high specific capacitance of 261F/g at 1A/g,which is much higher than that of ACNTs(109F/g)and NPC(214F/g)materials,and a high energy density of 53.75 Wh/kg at a high power density of 10 500 W/kg.