Journal
NEW JOURNAL OF CHEMISTRY
Volume 38, Issue 11, Pages 5509-5514Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nj01251h
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Funding
- National Science Foundation of China [21073233]
- National Key Basic Research and Development Program [2015CB251100]
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Hierarchical porous carbon is prepared from sucrose by the nano-CaCO3 template method followed by NaOH activation for supercapacitors. As evidenced by SEM, TEM, nitrogen sorption and Hg porosimetry analysis, the carbon possesses a highly developed hierarchical porous texture containing interconnected micro-, meso-, and macropores. The surface area and pore volume of the carbon reach up to 2032 m(2) g(-1) and 2.602 cm(3) g(-1), respectively. Galvanostatic charge-discharge and cyclic voltammetry measurements indicate that the carbon shows high capacitance and excellent rate capability in both mol(-1) KOH aqueous electrolyte, it can afford a capacitance of 245 F g(-1) at 0.05 A g(-1), which remains at 188 F g(-1) as the current density increases up to 50 A g(-1), while the value reaches 144 F g(-1) at 0.05 A g(-1) and remains at 103 F g(-1) at 10 A g(-1) in the 1 mol L-1 Et4NBF4/PC non-aqueous electrolyte.
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