Cyclic voltammetry of supercapacitors with the simplest equivalent circuit

Analytical equations for the voltammetric curve at the linear voltage sweep and for cyclic voltammograms for the system of connected in series resistance and capacitance were derived. The presence of the resistance results in an substantial distortion and curvature of the voltammogram, which disting...

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Bibliographic Details
Published inRussian chemical bulletin Vol. 69; no. 9; pp. 1672 - 1678
Main Authors Kulova, T. L., Skundin, A. M.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.09.2020
Springer Nature B.V
Subjects
Capacitance
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Electrons
Equivalent circuits
Full Articles
Inorganic Chemistry
Organic Chemistry
Voltage sweep rate
Voltammetry
equivalent circuit
cyclic voltammetry
linear voltage sweep
supercapacitor
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Summary:Analytical equations for the voltammetric curve at the linear voltage sweep and for cyclic voltammograms for the system of connected in series resistance and capacitance were derived. The presence of the resistance results in an substantial distortion and curvature of the voltammogram, which distinguishes this system from the system with the parallel connection of the capacitance and resistance. The character of the voltammograms is determined by the ratio of the following parameters: resistance ( R ), capacitance ( C ), voltage sweep rate ( v ), and voltage ( U ). The system is capacitive in character at RC ≪ U/v , whereas the character of the system is resistive at RC ≫ U/v.
ISSN:1066-5285
1573-9171
DOI:10.1007/s11172-020-2947-8