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Chemical Research in Chinese Universities ›› 2012, Vol. 28 ›› Issue (5): 780-783 .

• Articles • Previous Articles     Next Articles

Preparation and Supercapacitive Properties of Fe2O3/Active Carbon Nanocomposites

LUO Pei-wen1, YU Jian-guo1, SHI Zhi-qiang1, HUANG Hua1, LIU Lang1, ZHAO Yong-nan1, LI Guo-dong2, ZOU Yong-cun2   

  1. 1. Institute of Nanostructured Materials & Tianjin Key Laboratory of Fiber Modification and Functional Fiber,School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300160, P. R. China;
    2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry,Jilin University, Changchun 130012, P. R. China
  • Received:2011-10-10 Revised:2011-11-29 Online:2012-09-25 Published:2012-09-07
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21271138) and the Natural Science Foundation of Tianjin City, China(No.10JCZDJC21500).

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Abstract: Fe2O3/active carbon(Fe2O3/AC) nanocomposites were readily fabricated by pyrolyzing Fe3+ impregnated active carbon in a nitrogen atmosphere. The as-prepared composites were studied by X-ray powder diffraction(XRD), X-ray photoelectron spectroscopy(XPS) and transmission electron microscopy(TEM). The capacitive property of the composites was investigated by cyclic voltammetry(CV) and galvanostatic charge-discharge test. Physical characterizations show that the γ-Fe2O3 fine grains dispersed in the AC well, with a mean size of 21.24 nm. Electrochemical tests in 6 mol/L KOH solutions indicate that the as-prepared nanocomposites exhibited improved capacitive properties. The specific capacitance(SC) of Fe2O3/AC nanocomposites was up to 188.4 F/g that was derived from both electrochemical double-layer capacitance and pseudo-capacitance, which was 78% larger than that of pristine AC. A symmetric capacitor with Fe2O3/AC nanocomposites as electrode showed an excellent cycling stability. The SC was only reduced by a factor of 9.2% after 2000 cycles at a current density of 1 A/g.

Key words: Nanocomposite, Fe2O3, Active carbon, Supercapacitor