Hierarchically porous carbon nanofibers containing numerous heteroatoms for supercapacitors

作者：Yun Young Soo; Im Changbin; Park Hyun Ho; Hwang Imgon; Tak Yongsug; Jin Hyoung Joon^*

来源：Journal of Power Sources, 2013, 234: 285-291.

DOI：10.1016/j.jpowsour.2013.01.169

• Supercapacitor
• Carbon nanofiber
• Heteroatom
• Activated carbon

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.

• 出版日期2013-7-15