Journal
JOURNAL OF POWER SOURCES
Volume 204, Issue -, Pages 230-235Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2011.12.054
Keywords
Mesoporous carbon; One dimension structure; Template; Electrochemical capacitors
Funding
- National Natural Science Foundation of China [50972064, 50972065, 50632040]
- Program for New Century Excellent Talents in University [NCET-10-0496]
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Mesoporous carbons are prepared from a mixture of the soluble starch with needle-like nano-sized Mg(OH)(2) particles. The samples structures are characterized by TEM, nitrogen adsorption at 77K and XRD. The electrochemical performance for electrochemical capacitors is evaluated in a 6 M KOH aqueous solution. The resultant carbons show a disordered pore structure with interweaving straight nano-tunnels that resembled the shape of the template, and possess a high surface area more than 1000 m(2) g(-1) and a large pore volume. The special one dimensional morphology of templates cause a graphitization effect on the carbon in partial region, different from catalytic graphitization mechanism of transition metal particles. Due to those characteristics, the samples exhibit good electrochemical performances used for electrochemical capacitors electrode, especially excellent power capability. The sample carbonized at 950 degrees C for 6 h retain a capacitance of 126 Fg(-1) even at a high current density of 40A g(-1). (C) 2012 Elsevier B.V. All rights reserved.
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