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Electrochemical Characteristics and Properties of the Surface of Activated Carbon Electrodes in a Double-Layer Capacitor

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Abstract

Electrochemical behavior of electrodes based on activated carbon is studied by recording voltammetric curves and using the impedance method. A quantitative relation between hydrophobic and hydrophilic pores is established. Hydrophilization of activated carbon is performed. The occurrence of a reversible surface reaction is discovered in the region of negative potentials, where it was not observed earlier. A possible mechanism for the reaction is proposed and its kinetic parameters are found. The existence of surface compounds stable only in electrolyte (H2SO4) is established. A dramatic drop of the EDL capacitance at negative potentials is discovered.

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Authors and Affiliations

  1. Frumkin Institute of Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 117071, Russia

    A. Yu. Rychagov, N. A. Urisson & Yu. M. Vol'fkovich

Authors
  1. A. Yu. Rychagov
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  2. N. A. Urisson
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  3. Yu. M. Vol'fkovich
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Rychagov, A.Y., Urisson, N.A. & Vol'fkovich, Y.M. Electrochemical Characteristics and Properties of the Surface of Activated Carbon Electrodes in a Double-Layer Capacitor. Russian Journal of Electrochemistry 37, 1172–1179 (2001). https://doi.org/10.1023/A:1012715615873

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