Carbon Research Laboratory, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
ACS Appl Mater Interfaces. 2013 Mar;5(6):2104-10. doi: 10.1021/am303052n. Epub 2013 Mar 13.
Phosphate-functionalized carbon nanotube (CNT)-containing carbon composites with hierarchical porous structure have been synthesized by a simple soft-template hydrothermal method followed by heat treatment. The resulting carbon composites are characterized by FE-SEM, TEM, TGA, FTIR microspectroscopy, and nitrogen sorption techniques. The electrochemical performance of the carbon composites as electrode materials for supercapacitors is also investigated. The results show that CNTs can be uniformly embedded in the carbon matrix, and the phosphate groups are introduced into the carbon composites successfully. The addition of CNTs with suitable content significantly improves the rate capability of carbon composites in 6 M KOH aqueous solution. Cell voltage window can be extended to 1.2 V when increasing the heat treatment temperature of carbon composites to 800 °C, and the resulting composites exhibit highly stable performance in supercapacitors at high current load of 5 A g(-1) and wide cell voltage of 1.2 V.
采用简单的软模板水热法和热处理制备了具有分级多孔结构的磷功能化碳纳米管（CNT）含碳复合材料。通过 FE-SEM、TEM、TGA、FTIR 微光谱和氮气吸附技术对所得碳复合材料进行了表征。还研究了碳复合材料作为超级电容器电极材料的电化学性能。结果表明，CNT 可以均匀地嵌入碳基质中，并且磷基团成功地引入到碳复合材料中。添加适量 CNT 可显著提高碳复合材料在 6 M KOH 水溶液中的倍率性能。当将碳复合材料的热处理温度升高到 800°C 时，可将电池电压窗口扩展至 1.2 V，并且在高电流负载 5 A g(-1)和宽电池电压 1.2 V 下，所得复合材料在超级电容器中表现出高度稳定的性能。
