期刊
JOURNAL OF POWER SOURCES
卷 234, 期 -, 页码 285-291出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2013.01.169
关键词
Supercapacitor; Carbon nanofiber; Heteroatom; Activated carbon
资金
- National Research Foundation of Korea
- Korean Government (MEST) [NRF-2010-C1AAA001-0029018]
- National Research Foundation of Korea [2012M1A2A2671806] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, hierarchically porous carbon nanofibers (HPCNFs) containing numerous electroactive heteroatoms are prepared by controlling carbonization and chemical activation. The HPCNFs have a large surface area of 2862.1 m(2) g(-1), hierarchical porous structure, and 20.6 at% electroactive oxygen atoms. These HPCNFs exhibit excellent electrochemical performance, and their thermal treatment with melamine results in nitrogen-doped HPCNFs (N-HPCNFs) with 9.1 at% nitrogen and improved electrical property (1.8 x 10(2) square(-1)). The electrochemical performance of N-HPCNFs is better than that of HPCNFs, displaying specific energy of 113 Wh kg(-1), specific power of 105 kW kg(-1), and stable cycle life of over 5000 cycles. (c) 2013 Elsevier B.V. All rights reserved.
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