期刊
LANGMUIR
卷 32, 期 35, 页码 8934-8941出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.6b02250
关键词
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资金
- Natural Science Foundation of China [20906019, 21102032]
- Beijing National Laboratory for Molecular Sciences [20140120]
- Science and Technology Research Projects in Hebei Universities [QN20131069, QN2014142, ZD20131032, Z2013001]
- Five Platform Open Fund Projects of Hebei University of Science and Technology [2014PT86]
A novel dissolution-capture method for the fabrication of nitrogen-doped hollow mesoporous spherical carbon capsules (N-HMSCCs) with high capability for supercapacitor is developed. The fabrication process is performed by depositing mesoporous silica on the surface of the polyacrylonitrile nanospheres, followed by a dissolution-capture process occurring in the polyacrylonitrile core and silica shell. The polyacrylonitrile core is dissolved by dimethylformamide treatment to form a hollow cavity. Then, the polyacrylonitrile is captured into the mesochannel of silica. After carbonization and etching of silica, N-HMSCCs with uniform mesopore size are produced. The N-HMSCCs show a high specific capacitance of 206.0 F g(-1) at a current density of 1 A g(-1) in 6.0 M KOH due to its unique hollow nanostructure, high surface area, and nitrogen content. In addition, 92.3% of the capacitance of N-HMSCCs still remains after 3000 cycles at 5 A g(-1).The dissolution-capture method should give a useful enlightenment for the design of electrode materials for supercapacitor.
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