Impedance-Frequency Response of Closed Electrolytic Cells
The electric AC response of electrolytic cells with DC bias is analyzed solving numerically the Poisson–Nernst–Planck equations and avoiding the commonly used infinite solution approximation. The results show the presence of an additional low-frequency dispersion process associated with the finite s...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/14/2/368 |
| _version_ | 1797619226733707264 |
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| author | José Juan López-García José Horno Constantino Grosse |
| author_facet | José Juan López-García José Horno Constantino Grosse |
| author_sort | José Juan López-García |
| collection | DOAJ |
| description | The electric AC response of electrolytic cells with DC bias is analyzed solving numerically the Poisson–Nernst–Planck equations and avoiding the commonly used infinite solution approximation. The results show the presence of an additional low-frequency dispersion process associated with the finite spacing of the electrodes. Moreover, we find that the condition of fixed ionic content inside the electrolytic cell has a strong bearing on both the steady-state and the frequency response. For example: the characteristic frequency of the high-frequency dispersion decreases when the DC potential increases and/or the electrode spacing decreases in the closed cell case, while it remains essentially insensitive on these changes for open cells. Finally, approximate analytic expressions for the dependences of the main parameters of both dispersion processes are also presented. |
| first_indexed | 2024-03-11T08:24:03Z |
| format | Article |
| id | doaj.art-4aa34b0b33e34e17b3b48ff001d8f402 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-11T08:24:03Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-4aa34b0b33e34e17b3b48ff001d8f4022023-11-16T22:11:15ZengMDPI AGMicromachines2072-666X2023-01-0114236810.3390/mi14020368Impedance-Frequency Response of Closed Electrolytic CellsJosé Juan López-García0José Horno1Constantino Grosse2Departamento de Física, Universidad de Jaén, Campus Las Lagunillas, Ed. A-3, 23071 Jaén, SpainDepartamento de Física, Universidad de Jaén, Campus Las Lagunillas, Ed. A-3, 23071 Jaén, SpainDepartamento de Física, Universidad Nacional de Tucumán, Av. Independencia 1800, San Miguel de Tucumán 4000, ArgentinaThe electric AC response of electrolytic cells with DC bias is analyzed solving numerically the Poisson–Nernst–Planck equations and avoiding the commonly used infinite solution approximation. The results show the presence of an additional low-frequency dispersion process associated with the finite spacing of the electrodes. Moreover, we find that the condition of fixed ionic content inside the electrolytic cell has a strong bearing on both the steady-state and the frequency response. For example: the characteristic frequency of the high-frequency dispersion decreases when the DC potential increases and/or the electrode spacing decreases in the closed cell case, while it remains essentially insensitive on these changes for open cells. Finally, approximate analytic expressions for the dependences of the main parameters of both dispersion processes are also presented.https://www.mdpi.com/2072-666X/14/2/368Poisson-Nernst Planck equationsclosed electrolytic cellselectrical impedance spectroscopy |
| spellingShingle | José Juan López-García José Horno Constantino Grosse Impedance-Frequency Response of Closed Electrolytic Cells Micromachines Poisson-Nernst Planck equations closed electrolytic cells electrical impedance spectroscopy |
| title | Impedance-Frequency Response of Closed Electrolytic Cells |
| title_full | Impedance-Frequency Response of Closed Electrolytic Cells |
| title_fullStr | Impedance-Frequency Response of Closed Electrolytic Cells |
| title_full_unstemmed | Impedance-Frequency Response of Closed Electrolytic Cells |
| title_short | Impedance-Frequency Response of Closed Electrolytic Cells |
| title_sort | impedance frequency response of closed electrolytic cells |
| topic | Poisson-Nernst Planck equations closed electrolytic cells electrical impedance spectroscopy |
| url | https://www.mdpi.com/2072-666X/14/2/368 |
| work_keys_str_mv | AT josejuanlopezgarcia impedancefrequencyresponseofclosedelectrolyticcells AT josehorno impedancefrequencyresponseofclosedelectrolyticcells AT constantinogrosse impedancefrequencyresponseofclosedelectrolyticcells |