Journal
NEW JOURNAL OF CHEMISTRY
Volume 42, Issue 9, Pages 6763-6769Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nj04922f
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Funding
- National Natural Science Foundation of China [21471047, 21271048, 21271045, 21771039]
- National Major Basic Research Program of China [2013CB934101]
- Shanghai Science and Technology Committee [16DZ2270100]
- Research Project of the Chinese Ministry of Education [213023A]
- Excellent Youth Foundation of Henan Scientific Committee [124100510004]
- Program for Innovative Research Team in the University of Henan Province [14IRTSTHN005]
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A series of sponge-like hierarchical porous carbons are prepared using semen cassiae as the precursor and potassium oxalate monohydrate as the activation agent. These sponge-like carbon materials have high surface areas, wide distributions of pore size, and the appropriate forms of nitrogen/oxygen derivatives. All these advantages in structures and surface states contribute to the outstanding performances of such materials as electrodes for high performance electric double-layer capacitors, which include high specific capacitance, high cycling stability, and high energy density. For example, the optimal sample exhibits a high specific capacitance of 401 F g(-1), excellent cycling stability (94.5% retention after 10 000 cycles), high energy density (12.01 W h kg(-1)) and a high power density (10200 W kg(-1)) in 1 M H2SO4 solution.
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