State-of-Charge Monitoring by Impedance Spectroscopy during Long-Term Self-Discharge of Supercapacitors and Lithium-Ion Batteries
Frequency-dependent capacitance C(ω) is a rapid and reliable method for the determination of the state-of-charge (SoC) of electrochemical storage devices. The state-of-the-art of SoC monitoring using impedance spectroscopy is reviewed, and complemented by original 1.5-year long-term electr...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-08-01
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| Series: | Batteries |
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| Online Access: | http://www.mdpi.com/2313-0105/4/3/35 |
| _version_ | 1818195231671058432 |
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| author | Peter Kurzweil Mikhail Shamonin |
| author_facet | Peter Kurzweil Mikhail Shamonin |
| author_sort | Peter Kurzweil |
| collection | DOAJ |
| description | Frequency-dependent capacitance C(ω) is a rapid and reliable method for the determination of the state-of-charge (SoC) of electrochemical storage devices. The state-of-the-art of SoC monitoring using impedance spectroscopy is reviewed, and complemented by original 1.5-year long-term electrical impedance measurements of several commercially available supercapacitors. It is found that the kinetics of the self-discharge of supercapacitors comprises at least two characteristic time constants in the range of days and months. The curvature of the Nyquist curve at frequencies above 10 Hz (charge transfer resistance) depends on the available electric charge as well, but it is of little use for applications. Lithium-ion batteries demonstrate a linear correlation between voltage and capacitance as long as overcharge and deep discharge are avoided. |
| first_indexed | 2024-12-12T01:14:54Z |
| format | Article |
| id | doaj.art-a6a579267878476985211037737e114b |
| institution | Directory Open Access Journal |
| issn | 2313-0105 |
| language | English |
| last_indexed | 2024-12-12T01:14:54Z |
| publishDate | 2018-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Batteries |
| spelling | doaj.art-a6a579267878476985211037737e114b2022-12-22T00:43:23ZengMDPI AGBatteries2313-01052018-08-01433510.3390/batteries4030035batteries4030035State-of-Charge Monitoring by Impedance Spectroscopy during Long-Term Self-Discharge of Supercapacitors and Lithium-Ion BatteriesPeter Kurzweil0Mikhail Shamonin1Electrochemistry Laboratory, University of Applied Sciences (OTH), Kaiser-Wilhelm-Ring 23, 92224 Amberg, GermanyFaculty of Electrical Engineering and Information Technology, University of Applied Sciences (OTH), 93053 Regensburg, GermanyFrequency-dependent capacitance C(ω) is a rapid and reliable method for the determination of the state-of-charge (SoC) of electrochemical storage devices. The state-of-the-art of SoC monitoring using impedance spectroscopy is reviewed, and complemented by original 1.5-year long-term electrical impedance measurements of several commercially available supercapacitors. It is found that the kinetics of the self-discharge of supercapacitors comprises at least two characteristic time constants in the range of days and months. The curvature of the Nyquist curve at frequencies above 10 Hz (charge transfer resistance) depends on the available electric charge as well, but it is of little use for applications. Lithium-ion batteries demonstrate a linear correlation between voltage and capacitance as long as overcharge and deep discharge are avoided.http://www.mdpi.com/2313-0105/4/3/35capacitancestate-of-charge monitoringself-dischargesupercapacitoraging |
| spellingShingle | Peter Kurzweil Mikhail Shamonin State-of-Charge Monitoring by Impedance Spectroscopy during Long-Term Self-Discharge of Supercapacitors and Lithium-Ion Batteries Batteries capacitance state-of-charge monitoring self-discharge supercapacitor aging |
| title | State-of-Charge Monitoring by Impedance Spectroscopy during Long-Term Self-Discharge of Supercapacitors and Lithium-Ion Batteries |
| title_full | State-of-Charge Monitoring by Impedance Spectroscopy during Long-Term Self-Discharge of Supercapacitors and Lithium-Ion Batteries |
| title_fullStr | State-of-Charge Monitoring by Impedance Spectroscopy during Long-Term Self-Discharge of Supercapacitors and Lithium-Ion Batteries |
| title_full_unstemmed | State-of-Charge Monitoring by Impedance Spectroscopy during Long-Term Self-Discharge of Supercapacitors and Lithium-Ion Batteries |
| title_short | State-of-Charge Monitoring by Impedance Spectroscopy during Long-Term Self-Discharge of Supercapacitors and Lithium-Ion Batteries |
| title_sort | state of charge monitoring by impedance spectroscopy during long term self discharge of supercapacitors and lithium ion batteries |
| topic | capacitance state-of-charge monitoring self-discharge supercapacitor aging |
| url | http://www.mdpi.com/2313-0105/4/3/35 |
| work_keys_str_mv | AT peterkurzweil stateofchargemonitoringbyimpedancespectroscopyduringlongtermselfdischargeofsupercapacitorsandlithiumionbatteries AT mikhailshamonin stateofchargemonitoringbyimpedancespectroscopyduringlongtermselfdischargeofsupercapacitorsandlithiumionbatteries |