Journal
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
Volume 19, Issue -, Pages S738-S742Publisher
ELSEVIER
DOI: 10.1016/S1003-6326(10)60142-2
Keywords
supercapacitor; melamine; carbon aerogels; nanocomposites; nitrogen
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Funding
- Postdoctoral Foundation of Heilongjiang Province, China [LBH-Z07090]
- Education Department of Heilongjiang Province, China [11541267]
- Young Science Foundation of Heilongjiang University, China [QL200422]
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Activated nitrogen-enriched carbon/carbon aerogel nanocomposites (ANC/ACA) were prepared by synthesis of melamine resin/carbon aerogel composites, carbonization and KOH activation. Novel asymmetric supercapacitors consisting of Ni(OH)(2)/Co(OH)(2) as anode and ANC/ACA with different composite ratios as cathode were assembled. The influence of composite ratio on electrochemical performances of materials was detected by cycle voltammetry (CV) and galvanostatic charge/discharge methods. The results of XPS and SEM show that N atoms exist in the ANC/ACA and ANC/ACA shows nanometer and honeycomb structure with more pores. When the composite ratio of ANC/ACA is 12:1, the ANC/ACA shows the highest C-p1 (312.8 F/g) vs 103.4 F/g of ACA and 230.1 F/g of ANC. And the optimal asymmetric supercapacitor with the ANC/ACA as cathode also shows the best electrochemical performances. The optimal supercapacitor is stable over 100 cycles. When the current density is 50 mA/cm(2), the C-p2, E-p and P of the optimal supercapacitor are still 57.3 F/g, 9.0 W.h/g and 1 302.1 W/kg, respectively.
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