Electrochemical Tracking of Lithium Metal Anode Surface Evolution via Voltage Relaxation Analysis.
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| Title: | Electrochemical Tracking of Lithium Metal Anode Surface Evolution via Voltage Relaxation Analysis. |
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| Authors: | Min, Yu-Jeong1 (AUTHOR), Shin, Heon-Cheol1 (AUTHOR) hcshin@pusan.ac.kr |
| Source: | Energies (19961073). Jan2026, Vol. 19 Issue 1, p187. 18p. |
| Subjects: | Lithium cell electrodes, Surface dynamics, Interface dynamics, Charge transfer, Equivalent electric circuits, Electrochemical analysis |
| Abstract: | The surface morphology of lithium metal electrodes evolves markedly during cycling, modulating interfacial kinetics and increasing the risk of dendrite-driven internal short circuits. Here, we infer this morphological evolution from direct-current (DC) signals by analyzing open-circuit voltage (OCV) transients after constant current interruptions. The OCV exhibits a rapid initial decay followed by a transition to a slower long-time decay. With repeated plating, this transition shifts to earlier times, thereby increasing the contribution of long-term relaxation. We quantitatively analyze this behavior using an equivalent circuit with a transmission-line model (TLM) representing the electrolyte-accessible interfacial region of the electrode, discretized into ten depth-direction segments. Tracking segment-wise changes in resistances and capacitances with cycling enables morphology estimation. Repeated plating strongly increases the double-layer area near the current collector, while the charge-transfer-active surface shifts toward the separator side, showing progressively smaller and eventually negative changes toward the current-collector side. Together with the segment-resolved time constants, these trends indicate that lithium deposition becomes increasingly localized near the separator-facing surface, while the interior becomes more tortuous, consistent with post-mortem observations. Overall, the results demonstrate that DC voltage-relaxation analysis combined with a TLM framework provides a practical route to track lithium metal electrode surface evolution in Li-metal-based cells. [ABSTRACT FROM AUTHOR] |
| Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 190785333 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Electrochemical Tracking of Lithium Metal Anode Surface Evolution via Voltage Relaxation Analysis. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Min%2C+Yu-Jeong%22">Min, Yu-Jeong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shin%2C+Heon-Cheol%22">Shin, Heon-Cheol</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> hcshin@pusan.ac.kr</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Jan2026, Vol. 19 Issue 1, p187. 18p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Lithium+cell+electrodes%22">Lithium cell electrodes</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+dynamics%22">Surface dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Interface+dynamics%22">Interface dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Charge+transfer%22">Charge transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Equivalent+electric+circuits%22">Equivalent electric circuits</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemical+analysis%22">Electrochemical analysis</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The surface morphology of lithium metal electrodes evolves markedly during cycling, modulating interfacial kinetics and increasing the risk of dendrite-driven internal short circuits. Here, we infer this morphological evolution from direct-current (DC) signals by analyzing open-circuit voltage (OCV) transients after constant current interruptions. The OCV exhibits a rapid initial decay followed by a transition to a slower long-time decay. With repeated plating, this transition shifts to earlier times, thereby increasing the contribution of long-term relaxation. We quantitatively analyze this behavior using an equivalent circuit with a transmission-line model (TLM) representing the electrolyte-accessible interfacial region of the electrode, discretized into ten depth-direction segments. Tracking segment-wise changes in resistances and capacitances with cycling enables morphology estimation. Repeated plating strongly increases the double-layer area near the current collector, while the charge-transfer-active surface shifts toward the separator side, showing progressively smaller and eventually negative changes toward the current-collector side. Together with the segment-resolved time constants, these trends indicate that lithium deposition becomes increasingly localized near the separator-facing surface, while the interior becomes more tortuous, consistent with post-mortem observations. Overall, the results demonstrate that DC voltage-relaxation analysis combined with a TLM framework provides a practical route to track lithium metal electrode surface evolution in Li-metal-based cells. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=190785333 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/en19010187 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 18 StartPage: 187 Subjects: – SubjectFull: Lithium cell electrodes Type: general – SubjectFull: Surface dynamics Type: general – SubjectFull: Interface dynamics Type: general – SubjectFull: Charge transfer Type: general – SubjectFull: Equivalent electric circuits Type: general – SubjectFull: Electrochemical analysis Type: general Titles: – TitleFull: Electrochemical Tracking of Lithium Metal Anode Surface Evolution via Voltage Relaxation Analysis. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Min, Yu-Jeong – PersonEntity: Name: NameFull: Shin, Heon-Cheol IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 19961073 Numbering: – Type: volume Value: 19 – Type: issue Value: 1 Titles: – TitleFull: Energies (19961073) Type: main |
| ResultId | 1 |
