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Computer simulation of active layers in the electric double layer supercapacitor: Optimization of active layer charging modes and structure, calculation of overall characteristics

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Abstract

The structure and functioning modes of active layers in an electric double layer capacitor (EDLC) with an aqueous electrolyte are simulated by means of a computer. A model of active layers prepared from activated carbon materials is proposed, percolation estimates are performed and effective ionic conductivities are calculated. The polarization of active layers includes a sequence of two charging processes: first, galvanostatic and then potentiostatic. The proposed program of calculations involves mutual matching and optimization of seven parameters characterizing the active layer and conditions of charging processes. According to calculations, galvanostatic polarization of wide pores in the EDLC biporous active layer up to the limiting potential followed by potentiostatic polarization of fine pores allows the capacity C sp = 246 F/g and the energy W sp = 107 kJ/kg to be obtained in fractions of second.

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Authors and Affiliations

  1. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119071, Russia

    Yu. G. Chirkov

  2. National Research Nuclear University (Moscow Engineering Physics Institute), Kashirskoe sh. 31, Moscow, 115409, Russia

    V. I. Rostokin

Authors
  1. Yu. G. Chirkov
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  2. V. I. Rostokin
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Correspondence to Yu. G. Chirkov.

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Original Russian Text © Yu.G. Chirkov, V.I. Rostokin, 2014, published in Elektrokhimiya, 2014, Vol. 50, No. 3, pp. 235–250.

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Chirkov, Y.G., Rostokin, V.I. Computer simulation of active layers in the electric double layer supercapacitor: Optimization of active layer charging modes and structure, calculation of overall characteristics. Russ J Electrochem 50, 208–222 (2014). https://doi.org/10.1134/S1023193514030033

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  • DOI: https://doi.org/10.1134/S1023193514030033

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