How the electrochemical impedance spectroscopy can deepen the understanding of supercapacitor performance
Electrochemical impedance spectroscopy has been used for the characterization of electric double layer capacitors also known as supercapacitors. Specific surface area and pore size distribution for supercapacitor electrode materials and the results of impedance spectroscopy measurements for two typ...
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Chuiko Institute of Surface Chemistry of NAS of Ukraine
2022-03-01
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| Series: | Хімія, фізика та технологія поверхні |
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| Online Access: | https://cpts.com.ua/index.php/cpts/article/view/612 |
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| author | S. O. Zelinskyi N. G. Stryzhakova O. V. Gozhenko Y. A. Maletin |
| author_facet | S. O. Zelinskyi N. G. Stryzhakova O. V. Gozhenko Y. A. Maletin |
| author_sort | S. O. Zelinskyi |
| collection | DOAJ |
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Electrochemical impedance spectroscopy has been used for the characterization of electric double layer capacitors also known as supercapacitors. Specific surface area and pore size distribution for supercapacitor electrode materials and the results of impedance spectroscopy measurements for two types of commercially available nanoporous activated carbons and two graphene-type materials have been studied and compared with the results obtained from cyclic voltammetry and galvanostatic charge-discharge cycling the supercapacitor prototypes in different voltage ranges and at different current densities. It has been found that the results for the characteristics of studied supercapacitor prototypes differ insignificantly if they were obtained by different methods, while all three research methods have shown the advantage of materials with nanoporous activated carbon over materials of the graphene type. Besides, according to the data obtained by measuring impedance at low frequencies the deviations from ideal capacitive behaviour are more significant in case of graphene-type materials. Comparison of the three research methods used in this work shows that the method of impedance spectroscopy makes it possible to obtain the most complete and reliable information on the performance characteristics of the supercapacitor system, since not only the capacitance and resistance values, but their frequency dependence, as well as deviations (in degrees) from the purely capacitive vertical line at Nyquist plots and capacitance dissipation can be determined and taken into consideration.
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| format | Article |
| id | doaj-art-043306693c4248da8ff48c5c1e567e2b |
| institution | Kabale University |
| issn | 2079-1704 2518-1238 |
| language | English |
| publishDate | 2022-03-01 |
| publisher | Chuiko Institute of Surface Chemistry of NAS of Ukraine |
| record_format | Article |
| series | Хімія, фізика та технологія поверхні |
| spelling | doaj-art-043306693c4248da8ff48c5c1e567e2b2025-08-20T03:31:10ZengChuiko Institute of Surface Chemistry of NAS of UkraineХімія, фізика та технологія поверхні2079-17042518-12382022-03-0113110.15407/hftp13.01.070How the electrochemical impedance spectroscopy can deepen the understanding of supercapacitor performanceS. O. Zelinskyi0N. G. Stryzhakova1O. V. Gozhenko2Y. A. Maletin3Institute for Sorption and Problems of Endoecology, NAS UkraineInstitute for Sorption and Problems of Endoecology, NAS UkraineInstitute for Sorption and Problems of Endoecology, NAS UkraineInstitute for Sorption and Problems of Endoecology, NAS Ukraine Electrochemical impedance spectroscopy has been used for the characterization of electric double layer capacitors also known as supercapacitors. Specific surface area and pore size distribution for supercapacitor electrode materials and the results of impedance spectroscopy measurements for two types of commercially available nanoporous activated carbons and two graphene-type materials have been studied and compared with the results obtained from cyclic voltammetry and galvanostatic charge-discharge cycling the supercapacitor prototypes in different voltage ranges and at different current densities. It has been found that the results for the characteristics of studied supercapacitor prototypes differ insignificantly if they were obtained by different methods, while all three research methods have shown the advantage of materials with nanoporous activated carbon over materials of the graphene type. Besides, according to the data obtained by measuring impedance at low frequencies the deviations from ideal capacitive behaviour are more significant in case of graphene-type materials. Comparison of the three research methods used in this work shows that the method of impedance spectroscopy makes it possible to obtain the most complete and reliable information on the performance characteristics of the supercapacitor system, since not only the capacitance and resistance values, but their frequency dependence, as well as deviations (in degrees) from the purely capacitive vertical line at Nyquist plots and capacitance dissipation can be determined and taken into consideration. https://cpts.com.ua/index.php/cpts/article/view/612supercapacitorselectrochemical impedance spectroscopycomplex capacitancecyclic voltammetrygalvanostatic cycling |
| spellingShingle | S. O. Zelinskyi N. G. Stryzhakova O. V. Gozhenko Y. A. Maletin How the electrochemical impedance spectroscopy can deepen the understanding of supercapacitor performance Хімія, фізика та технологія поверхні supercapacitors electrochemical impedance spectroscopy complex capacitance cyclic voltammetry galvanostatic cycling |
| title | How the electrochemical impedance spectroscopy can deepen the understanding of supercapacitor performance |
| title_full | How the electrochemical impedance spectroscopy can deepen the understanding of supercapacitor performance |
| title_fullStr | How the electrochemical impedance spectroscopy can deepen the understanding of supercapacitor performance |
| title_full_unstemmed | How the electrochemical impedance spectroscopy can deepen the understanding of supercapacitor performance |
| title_short | How the electrochemical impedance spectroscopy can deepen the understanding of supercapacitor performance |
| title_sort | how the electrochemical impedance spectroscopy can deepen the understanding of supercapacitor performance |
| topic | supercapacitors electrochemical impedance spectroscopy complex capacitance cyclic voltammetry galvanostatic cycling |
| url | https://cpts.com.ua/index.php/cpts/article/view/612 |
| work_keys_str_mv | AT sozelinskyi howtheelectrochemicalimpedancespectroscopycandeepentheunderstandingofsupercapacitorperformance AT ngstryzhakova howtheelectrochemicalimpedancespectroscopycandeepentheunderstandingofsupercapacitorperformance AT ovgozhenko howtheelectrochemicalimpedancespectroscopycandeepentheunderstandingofsupercapacitorperformance AT yamaletin howtheelectrochemicalimpedancespectroscopycandeepentheunderstandingofsupercapacitorperformance |