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Real-time monitoring of internal structural deformation and thermal events in lithium-ion cell via embedded distributed optical fibre
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Yu, Yifei, Vergori, Elena, Maddar, Faduma, Guo, Yue, Greenwood, David G. and Marco, James (2022) Real-time monitoring of internal structural deformation and thermal events in lithium-ion cell via embedded distributed optical fibre. Journal of Power Sources, 521 . 230957. doi:10.1016/j.jpowsour.2021.230957 ISSN 0378-7753.
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WRAP-real-time-monitoring-internal-structural-deformation-thermal-events-lithium-ion-cell-via-embedded-distributed-optical-fibre-Yu-2022.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (10Mb) | Preview |
Official URL: https://doi.org/10.1016/j.jpowsour.2021.230957
Abstract
The in-operando monitoring of the cell's kinetic thermal and electrochemical processes during operation is a key requirement to understand battery performance, improve safety and to extend battery life. This research presents in-situ measurements of strain and temperature evolution within a graphite electrode during electromechanical lithiation and delithiation. By embedding distributed fibre optics sensor, the frequency shift associated with both temperature and strain are decoupled, allowing the real-time measurement of the solid electrolyte interface formation and the structural deformation within the anode. An in-depth assessment of electrode strain as a function of State of Charge (SoC) and State of Health (SoH) from the formation cycle through to electrical loading allows the assessment of cell performance over its complete life. It is observed that irreversible and non-uniformly distributed anode structural deformation was measured during the formation. The anode reveals an extensive mechanical strain increase with a coefficient of 0.96 με/SoC(%) with respect to the SoC and undergoes a compressive mechanical strain as SoH decreases from 100% to 47%. Collectively, the findings presented provide valuable new information to understand the causes of battery performance degradation as a result of electrode strain and temperature, underpinning new opportunities for battery characterisation and optimal system design.
| Item Type: | Journal Article | ||||||||
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| Subjects: | H Social Sciences > HF Commerce T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
| SWORD Depositor: | Library Publications Router | ||||||||
| Library of Congress Subject Headings (LCSH): | Lithium ion batteries, Lithium ion batteries -- Thermal properties, Lithium ion batteries -- Thermomechanical properties, Optical fiber detectors, Fiber optics , Product life cycle, Lithium ion batteries -- Deterioration | ||||||||
| Journal or Publication Title: | Journal of Power Sources | ||||||||
| Publisher: | Elsevier S.A. | ||||||||
| ISSN: | 0378-7753 | ||||||||
| Official Date: | 15 February 2022 | ||||||||
| Dates: |
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| Volume: | 521 | ||||||||
| Article Number: | 230957 | ||||||||
| DOI: | 10.1016/j.jpowsour.2021.230957 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||
| Date of first compliant deposit: | 5 January 2022 | ||||||||
| Date of first compliant Open Access: | 7 January 2022 | ||||||||
| RIOXX Funder/Project Grant: |
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