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 Cp1 (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/cm2, the Cp2, Ep and P of the optimal supercapacitor are still 57.3 F/g, 9.0 W·h/g and 1 302.1 W/kg, respectively.
QIN Chuan-li LU Xing YIN Ge-ping BAI Xu-duo JIN Zheng
Research Station on Material Science and Engineering for Postoral Fellows, School of Materials Scien Key Laboratory of Functional Polymer Materials, School of Chemistry and Material Sciences,Heilongjia Research Station on Material Science and Engineering for Postoral Fellows, School of Materials Scien Key Laboratory of Functional Polymer Materials, School of Chemistry and Material Sciences,Heilongjia Key Laboratory of Functional Polymer Materials, School of Chemistry and Material Sciences,Heilongjia