“Electrochemical Shock” of Intercalation Electrodes: A Fracture Mechanics Analysis
Fracture of electrode particles due to diffusion-induced stress has been implicated as a possible mechanism for capacity fade and impedance growth in lithium-ion batteries. In brittle materials, including many lithium intercalation materials, knowledge of the stress profile is necessary but insuffic...
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| Format: | Article |
| Language: | en_US |
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The Electrochemical Society
2013
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| Online Access: | http://hdl.handle.net/1721.1/79696 https://orcid.org/0000-0001-7564-7173 https://orcid.org/0000-0002-0833-7674 |
| _version_ | 1826202607222259712 |
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| author | Chiang, Yet-Ming Carter, W. Craig Woodford, William Henry |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Chiang, Yet-Ming Carter, W. Craig Woodford, William Henry |
| author_sort | Chiang, Yet-Ming |
| collection | MIT |
| description | Fracture of electrode particles due to diffusion-induced stress has been implicated as a possible mechanism for capacity fade and impedance growth in lithium-ion batteries. In brittle materials, including many lithium intercalation materials, knowledge of the stress profile is necessary but insufficient to predict fracture events. We derive a fracture mechanics failure criterion for individual electrode particles and demonstrate its utility with a model system, galvanostatic charging of Li[subscript x]Mn[subscript 2]O[subscript 4]. Fracture mechanics predicts a critical C-rate above which active particles fracture; this critical C-rate decreases with increasing particle size. We produce an electrochemical shock map, a graphical tool that shows regimes of failure depending on C-rate, particle size, and the material’s inherent fracture toughness K[subscript Ic] . Fracture dynamics are sensitive to the gradient of diffusion-induced stresses at the crack tip; as a consequence, small initial flaws grow unstably and are therefore potentially more damaging than larger initial flaws, which grow stably. |
| first_indexed | 2024-09-23T12:10:58Z |
| format | Article |
| id | mit-1721.1/79696 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T12:10:58Z |
| publishDate | 2013 |
| publisher | The Electrochemical Society |
| record_format | dspace |
| spelling | mit-1721.1/796962022-10-01T08:36:26Z “Electrochemical Shock” of Intercalation Electrodes: A Fracture Mechanics Analysis Chiang, Yet-Ming Carter, W. Craig Woodford, William Henry Massachusetts Institute of Technology. Department of Materials Science and Engineering Woodford, William Henry Chiang, Yet-Ming Carter, W. Craig Fracture of electrode particles due to diffusion-induced stress has been implicated as a possible mechanism for capacity fade and impedance growth in lithium-ion batteries. In brittle materials, including many lithium intercalation materials, knowledge of the stress profile is necessary but insufficient to predict fracture events. We derive a fracture mechanics failure criterion for individual electrode particles and demonstrate its utility with a model system, galvanostatic charging of Li[subscript x]Mn[subscript 2]O[subscript 4]. Fracture mechanics predicts a critical C-rate above which active particles fracture; this critical C-rate decreases with increasing particle size. We produce an electrochemical shock map, a graphical tool that shows regimes of failure depending on C-rate, particle size, and the material’s inherent fracture toughness K[subscript Ic] . Fracture dynamics are sensitive to the gradient of diffusion-induced stresses at the crack tip; as a consequence, small initial flaws grow unstably and are therefore potentially more damaging than larger initial flaws, which grow stably. United States. Dept. of Energy. Office of Basic Energy Sciences (Award DE-SC0002633) National Science Foundation (U.S.). Graduate Research Fellowship Program 2013-07-25T13:37:26Z 2013-07-25T13:37:26Z 2010-08 2010-06 Article http://purl.org/eprint/type/JournalArticle 00134651 1945-7111 http://hdl.handle.net/1721.1/79696 Woodford, William H., Yet-Ming Chiang, and W. Craig Carter. “Electrochemical Shock” of Intercalation Electrodes: A Fracture Mechanics Analysis. Journal of The Electrochemical Society 157, no. 10 (2010): A1052. © 2010 ECS - The Electrochemical Society https://orcid.org/0000-0001-7564-7173 https://orcid.org/0000-0002-0833-7674 en_US http://dx.doi.org/10.1149/1.3464773 Journal of The Electrochemical Society Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf The Electrochemical Society MIT web domain |
| spellingShingle | Chiang, Yet-Ming Carter, W. Craig Woodford, William Henry “Electrochemical Shock” of Intercalation Electrodes: A Fracture Mechanics Analysis |
| title | “Electrochemical Shock” of Intercalation Electrodes: A Fracture Mechanics Analysis |
| title_full | “Electrochemical Shock” of Intercalation Electrodes: A Fracture Mechanics Analysis |
| title_fullStr | “Electrochemical Shock” of Intercalation Electrodes: A Fracture Mechanics Analysis |
| title_full_unstemmed | “Electrochemical Shock” of Intercalation Electrodes: A Fracture Mechanics Analysis |
| title_short | “Electrochemical Shock” of Intercalation Electrodes: A Fracture Mechanics Analysis |
| title_sort | electrochemical shock of intercalation electrodes a fracture mechanics analysis |
| url | http://hdl.handle.net/1721.1/79696 https://orcid.org/0000-0001-7564-7173 https://orcid.org/0000-0002-0833-7674 |
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