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Comprehensive potentiodynamic analysis of electrodes performance in hybrid capacitors


[ 1 ] Wydział Technologii Chemicznej, Politechnika Poznańska | [ 2 ] Instytut Chemii i Elektrochemii Technicznej, Wydział Technologii Chemicznej, Politechnika Poznańska | [ SzD ] doctoral school student | [ P ] employee

Scientific discipline (Law 2.0)

[6.5] Chemical sciences

Year of publication


Published in

Electrochemistry Communications

Journal year: 2023 | Journal volume: vol. 147

Article type

scientific article

Publication language


  • Potentiodynamic analysis
  • Li-ion capacitor
  • Electrodes contribution
  • Scan rate determination

EN A methodology which assesses the potentiodynamic characteristics of individual electrodes in hybrid capacitors (HCs) is introduced, using a Li-ion capacitor (LIC) as an example. Each electrode contribution was calculated from cyclic voltammetry (CV) measurements on a cell equipped with a reference electrode by adapting the procedure for electrical double-layer capacitors. It has been confirmed that, during the potentiodynamic analysis of a hybrid capacitor, the scan rate of the electrodes (dE+/dt and dE-/dt) is not constant in time. Furthermore, dE-/dt tends to 0, while dE+/dt aims to reach the rate of the voltage sweep (dU/dt). By contrast, when the electrodes are analyzed separately at a constant potential scan rate, the voltammogram of the battery-type negative electrode does not provide the same current response as a hybrid capacitor, where only the voltage ramp is controlled. The proposed methodology is fundamental for revealing any imbalance in the contributions of the electrodes and providing a correct representation of their current profiles during the potentiodynamic analysis of a hybrid cell.

Date of online publication


Pages (from - to)

107436-1 - 107436-6





Article number: 107436

License type

CC BY-NC-ND (attribution - noncommercial - no derivatives)

Open Access Mode

open journal

Open Access Text Version

final published version

Release date


Date of Open Access to the publication

at the time of publication

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Impact Factor

5.443 [List 2021]

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