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Controlled Synthesis of Ultrathin Hollow Mesoporous Carbon Nanospheres for Supercapacitor Applications
DAI Yihui,JIANG Hao #,HU Yanjie,FU Yao,LUO Meifang,LI Chunzhong *
Key Laboratory for Ultra?ne Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
*Correspondence author
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Funding: This work was supported by the Special Research Fund for the Docoral Program of Higher Education of China (No.20110074110010, 20120074120004))
Opened online:23 January 2014
Accepted by: none
Citation: DAI Yihui,JIANG Hao,HU Yanjie.Controlled Synthesis of Ultrathin Hollow Mesoporous Carbon Nanospheres for Supercapacitor Applications[OL]. [23 January 2014] http://en.paper.edu.cn/en_releasepaper/content/4582572
 
 
In this paper, ultrathin, uniform and monodisperse hollow mesoporous carbon nanospheres (HMCNs) with a thickness of ~ 3.8 nm have been synthesized by using dopamine as a carbon source. The obtained HMCNs have a high specific surface area (568 m2 g?1), large pore volume (1.63 cm3 g?1), and highly accessible big mesopores (~ 9.1 nm). Notably, we realized the precise control of the shell thickness in a range of < 10 nm only by tuning dopamine content. The as-obtained HMCNs, when applied as supercapacitor electrodes, demonstrate an impressive capacitive properties in 1 M H2SO4 aqueous solution, such as high specific capacitance (253 F g?1), excellent rate capability (111 F g?1 at 60 A g?1) and outstanding cycling stability (only 3.8% loss after 5000 cycles). The results suggest that the unique structure of the HMCNs can allow high rate of electrolyte infiltration, as well as rapid ion diffusion. The present findings push forward the development of carbon materials, exhibiting huge potential for applications in energy storage fields.
Keywords:Nanostructures; dopamine; mesoporous carbon nanosphere; silica; supercapacitor
 
 
 

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