High-performance carbon nanotube-implanted mesoporous carbon spheres for supercapacitors with low series resistance

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• 作者：Bin Yi^a ; Xiaohua Chen^a ;   ; ^{hudacxh62@yahoo.com.cn} ; Kaimin Guo^b ; Longshan Xu^c ; Chuansheng Chen^b ; Haimei Yan^a ; Jianghua Chen^a
• 关键词：A. Composites ; B. Chemical synthesis ; C. Electrochemical measurements ; D. Energy storage
• 刊名：Materials Research Bulletin
• 出版年：2011
• 出版时间：November 2011
• 年：2011
• 卷：46
• 期：11
• 页码：2168-2172
• 全文大小：980 K

文摘

Carbon nanotube-implanted mesoporous carbon spheres were prepared by an easy polymerization-induced colloid aggregation method using gelatin as a soft template. Scanning electron microscopy, transmission electron microscopy and nitrogen adsorption¨Cdesorption measurements reveal that the materials are mesoporous carbon spheres, with a diameter of ?.5?.0 ¦Ìm, a specific surface area of 284 m²/g and average pore size of 3.9 nm. Using the carbon nanotube-implanted mesoporous carbon spheres as electrode material for supercapacitors in an aqueous electrolyte solution, a low equivalent series resistance of 0.83 ¦¸ cm² and a maximum specific capacitance of 189 F/g with a measured power density of 8.7 kW/kg at energy density of 6.6 Wh/kg are obtained.