Fractional-order electric double-layer capacitors with tunable low-frequency impedance phase angle and energy storage capabilities

Anis Allagui; Halima Alnaqbi; Ahmed S. Elwakil; Zafar Said; Ahmed A. Hachicha; Chunlei Wang; Mohammad A. Abdelkareem

doi:10.1063/1.5138243

Fractional-order electric double-layer capacitors with tunable low-frequency impedance phase angle and energy storage capabilities

Anis Allagui, Halima Alnaqbi, Ahmed S. Elwakil, Zafar Said, Ahmed A. Hachicha, Chunlei Wang, Mohammad A. Abdelkareem

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

In this study, we report the electrical response of two sets of solid-state fractional-order electrochemical capacitors for which the low-frequency impedance phase angle can be tuned from - 69 ° to - 7 °. The configuration makes use of a gel electrolyte in which carbonaceous additives (graphite or reduced graphene oxide) are dispersed at different proportions. Such a disordered electrolyte structure results in subdiffusive charge transport and thus a frequency dispersive capacitive-resistive behavior typical of a constant phase element, which can be useful for both frequency applications and energy storage purposes.

Original language	English
Article number	013902
Journal	Applied Physics Letters
Volume	116
Issue number	1
DOIs	https://doi.org/10.1063/1.5138243
Publication status	Published - Jan 6 2020
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.5138243

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abstract = "In this study, we report the electrical response of two sets of solid-state fractional-order electrochemical capacitors for which the low-frequency impedance phase angle can be tuned from - 69 ° to - 7 °. The configuration makes use of a gel electrolyte in which carbonaceous additives (graphite or reduced graphene oxide) are dispersed at different proportions. Such a disordered electrolyte structure results in subdiffusive charge transport and thus a frequency dispersive capacitive-resistive behavior typical of a constant phase element, which can be useful for both frequency applications and energy storage purposes.",

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AU - Said, Zafar

AU - Hachicha, Ahmed A.

AU - Wang, Chunlei

AU - Abdelkareem, Mohammad A.

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AB - In this study, we report the electrical response of two sets of solid-state fractional-order electrochemical capacitors for which the low-frequency impedance phase angle can be tuned from - 69 ° to - 7 °. The configuration makes use of a gel electrolyte in which carbonaceous additives (graphite or reduced graphene oxide) are dispersed at different proportions. Such a disordered electrolyte structure results in subdiffusive charge transport and thus a frequency dispersive capacitive-resistive behavior typical of a constant phase element, which can be useful for both frequency applications and energy storage purposes.

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Fractional-order electric double-layer capacitors with tunable low-frequency impedance phase angle and energy storage capabilities

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