Journal
RSC ADVANCES
Volume 7, Issue 27, Pages 16678-16687Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra01043e
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [51402146]
- National Science Funds for Excellent Young Scholars [51422807]
- Science and Technology Planning Project of Jiangxi province [20151BBG70019]
Ask authors/readers for more resources
N-Doped hierarchical porous carbon (NHPC) was obtained from waste boat-fruited sterculia seed by hydrothermal carbonization and KOH activation. The influence factors including the ratio of activation agent to precursor, activation temperature, and heteroatom-doping were discussed. The results showed that the NHPC-800-1 activated at 800 degrees C with the ratio of activation agent to precursor being 1 as an electrode in an electrical double layer capacitor (EDLC) exhibited the best electrochemical performance in 6 M KOH electrolyte. It delivered the specific capacitance up to 337 F g(-1) at a current density of 1 A g(-1), and still retained a capacitance of 181.5 F g(-1) at the high current density of 50 A g(-1). This material also shows an excellent capacitance retention of 98.8% after 5000 cycles at a current density of 20 A g(-1). In addition, a symmetric supercapacitor fabricated by NHPC-800-1 released an energy density of 8.05 W h kg(-1) at a power density of 10 kW kg(-1), and a high cycling stability with a capacitance retention of 98.5% over 10 000 cycles at 20 A g(-1) in 6 M KOH electrolyte. The superior performance of NHPC800-1 could be attributed to these advantages of hierarchical porous structure, narrow micropore size distribution and rational micro/mesopore ratio, as well as the doping of the N atoms. These very attractive electrochemical properties indicate that the NHPC-800-1 derived from boat-fruited sterculia is a promising electrode material for supercapacitors.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available