Preparation of monodisperse carbon nanospheres for electrochemical capacitors

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• 作者：Dingsheng Yuan ; Jingxing Chen ; Jianghua Zeng ; Sanxiang Tan
• 关键词：Electrochemical capacitors ; Carbon nanospheres ; Hydrothermal method ; Specific surface area ; Specific capacitance
• 刊名：Electrochemistry Communications
• 出版年：2008
• 出版时间：July 2008
• 年：2008
• 卷：10
• 期：7
• 页码：1067-1070
• 全文大小：328 K

文摘

The efficiently hydrothermal route using sucrose without any catalysts is employed to prepare the uniform carbon spheres. The monodisperse 100–150 nm carbon spheres are obtained with the activation treatment in molten KOH. The carbon spheres are characterized by transmission electron microscope, X-ray diffraction, N₂ adsorption, Raman spectroscopy and electrochemical techniques. The relationships of specific capacitance and surface properties of carbon spheres are investigated. A single electrode of carbon nanosphere materials performs excellent specific capacitance (328 F g⁻¹), area capacitance (19.2 μF cm⁻²) and volumetric capacitance (383 F cm⁻³).