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Effect of crystallinity on the electrochemical properties of carbon black electrodes

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2011, 12(4), pp.252-255
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General

유혜민 1 허건영 1 PARK SOOJIN 1

1인하대학교

Candidate

ABSTRACT

Carbon-based electric double-layer capacitors are being evaluated as potential energy-storage devices in an expanding number of applications. In this study, samples of carbon black (CB) treated at different temperatures ranging from 650°C to 1100°C were used as electrodes to improve the efficiency of a capacitor. The surface properties of the heat-treated CB samples were characterized by X-ray photoelectron spectroscopy and X-ray diffraction. The effect of the heat-treatment temperature on the electrochemical behaviors was investigated by cyclic voltammetry and in galvanostatic charge-discharge experiments. The experimental results showed that the crystallinity of the CBs increased as the heat-treatment temperature increased. In addition, the specific capacitance of the CBs was found to increase with the increase in the heat-treatment temperature. The maximum specific capacitance was 165 F·g-1 for the CB sample treated at 1000oC.

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