氮/氧共掺杂多孔碳纳米带的可控制备及储能特性

采用模板聚合同步活化法可控制备了氮/氧共掺杂的多孔碳纳米带(PCNR)材料。通过SEM,TEM,FTIR,Raman,XRD,BET和XPS对PCNR的形貌和结构进行了表征,结果表明:PCNR呈三维连通的带状结构,碳纳米带表面呈多孔状;800℃活化制备的PCNR800样品比表面积为2342 m2/g、氮含量为10.75%,氧含量为13.90%。PCNR800为电极活性物质组装的超级电容器,其具有优异的储能特性。在电流密度为1.0 A/g时,比电容为58.8 F/g;在功率密度为1.5 kW/kg时,能量密度为73.3 Wh/kg;5000次恒流充放电循环后,比电容为初始比电容的96.5%,库仑效率保持99%以上。

Synthesis and energy storage properties of N/O co-doped porous carbon nanoribbons

The N/O co-doped porous carbon nanoribbons(PCNR)have been prepared via a template polymerization synchronous chemical activation route.The PCNR samples were characterized by SEM,TEM,FTIR,Raman,XRD,BET and XPS.The results show that the PCNR presents a 3D connected ribbon structure.The surface of carbon nanoribbons is porous.The PCNR800 activated at 800℃presents a large specific surface area of 2342 m2/g,high-level nitrogen atom doping of 10.75%and oxygen atom doping of 13.90%.As supercapacitor electrode materials,the typical PCNR800 sample exhibits excellent energy storage characteristics.The PCNR800 supercapacitor shows a high specific capacitance of 58.8 F/g(1.0 A/g).A high energy density of 73.3 Wh/kg at a power density of 1.5 kW/kg can be achieved.The specific capacitance of the supercapacitor was 96.5%of the initial specific capacitance and the columbic efficiency still remains above 99%after 5000 cycles.