碳纳米管
材料科学
电极
电容器
电解质
超级电容器
纳米技术
电解电容器
功率密度
电化学
化学工程
纳米管
碳纤维
复合材料
化学
功率(物理)
电气工程
电压
工程类
物理化学
物理
量子力学
复合数
作者
Chunming Niu,E. K. Sichel,Robert Hoch,David Moy,Howard Tennent
摘要
Carbon nanotube sheet electrodes have been prepared from catalytically grown carbon nanotubes of high purity and narrow diameter distribution, centered around 80 Å. Our study shows that the electrodes are free-standing mats of entangled nanotubes with an open porous structure almost impossible to obtain with activated carbon or carbon fiber. These properties are highly desirable for high power and long cycle life electrochemical capacitors. Specific capacitances of 102 and 49 F/g were measured at 1 and 100 Hz, respectively, on a single cell device with 38 wt % H2SO4 as the electrolyte. The same cell had a power density of >8000 W/kg.
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