Journal
JOURNAL OF POROUS MATERIALS
Volume 21, Issue 6, Pages 1009-1014Publisher
SPRINGER
DOI: 10.1007/s10934-014-9850-3
Keywords
Nitrogen-doped carbon monoliths; Hydrothermal synthesis; Hierarchically porous; Supercapacitors
Funding
- Chongqing Municipal Education Commission [KJ121201]
- First Excellent Young Teachers Program of Chongqing high school [[2011]65]
- Chongqing Yongchuan Key Technologies R&D Program (YCSTC) [2011AC4001]
- Chongqing University of Arts and Sciences [Z2011RCYJ04]
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The nitrogen-doped hierarchically porous carbon monoliths (N-HPCMs) were successfully synthesized by using dicyandiamide (DCDA) as nitrogen source, phenolic resol as carbon precursor and mixed triblock copolymers as templates via a one-pot hydrothermal approach. The obtained carbon monoliths possess tunable mesopore size (4.3-11.4 nm), large surface area (552-660 m(2)/g), and high nitrogen content (up to 12.1 wt%). Ascribed to the nitrogen-doped frameworks and hierarchical porosity, N-HPCMs exhibit good electrochemical performance as the supercapacitor electrode with specific capacitance of 268.9 F/g (in 6 M KOH) at a current density of 1 A/g, and a 4.1 % loss of the specific capacitance after 5,000 charge-discharge cycles, indicating a long-term cycling stability. Such unique features make N-HPCMs promising electrode materials for high performance supercapacitors.
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