Particle- and crack-size dependency of lithium-ion battery materials LiFePO<sub>4</sub>
Lithium-ion batteries have become a widely-used commodity for satisfying the world’s mobile power needs. However, the mechanical degradation of lithium-ion batteries initiated by micro cracks is considered to be a bottleneck for advancing the current technology. This study utilizes a finite element...
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| Format: | Article |
| Language: | English |
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AIMS Press
2016-02-01
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| Series: | AIMS Materials Science |
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| Online Access: | http://www.aimspress.com/Materials/article/626/fulltext.html |
| _version_ | 1818126581207400448 |
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| author | Michael A. Stamps Jeffrey W. Eischen Hsiao-Ying Shadow Huang |
| author_facet | Michael A. Stamps Jeffrey W. Eischen Hsiao-Ying Shadow Huang |
| author_sort | Michael A. Stamps |
| collection | DOAJ |
| description | Lithium-ion batteries have become a widely-used commodity for satisfying the world’s mobile power needs. However, the mechanical degradation of lithium-ion batteries initiated by micro cracks is considered to be a bottleneck for advancing the current technology. This study utilizes a finite element method-based virtual crack closure technique to obtain particle- and crack-size-dependent estimates of mixed-mode energy release rates and stress intensity factors. Interfacial cracks in orthotropic bi-materials are considered in the current study, whereas the crack extension along the interface is assumed. The results show that energy release rate, stress intensity factor, and the propensity of crack extension are particle- and crack-size- dependent. In particular, our results show that for smaller plate-like LiFePO<sub>4</sub> particles (100 nm × 45 nm), a crack has lesser tendency to extend if crack-to-particle size is less than 0.2, and for 200 nm × 90 nm particles, similar results are obtained for crack-to-particle sizes of less than 0.15. However, for larger particles (500 nm × 225 nm), it requires an almost flawless particle to have no crack extension. Therefore, the current study provides insight into the fracture mechanics of LiFePO<sub>4</sub> and the associated crack-to-particle size dependency to prevent crack extensions. |
| first_indexed | 2024-12-11T07:03:44Z |
| format | Article |
| id | doaj.art-9e5f1441574343ff90d72bcac8dd89f2 |
| institution | Directory Open Access Journal |
| issn | 2372-0484 |
| language | English |
| last_indexed | 2024-12-11T07:03:44Z |
| publishDate | 2016-02-01 |
| publisher | AIMS Press |
| record_format | Article |
| series | AIMS Materials Science |
| spelling | doaj.art-9e5f1441574343ff90d72bcac8dd89f22022-12-22T01:16:34ZengAIMS PressAIMS Materials Science2372-04842016-02-013119020310.3934/matersci.2016.1.190matersci-03-00190Particle- and crack-size dependency of lithium-ion battery materials LiFePO<sub>4</sub>Michael A. Stamps0Jeffrey W. Eischen1Hsiao-Ying Shadow Huang2Mechanical and Aerospace Engineering Department, North Carolina State University, R3311 Engineering Building 3, Campus Box 7910,911 Oval Drive, Raleigh, NC 27695, USMechanical and Aerospace Engineering Department, North Carolina State University, R3290 Engineering Building 3, Campus Box 7910,911 Oval Drive, Raleigh, NC 27695, USMechanical and Aerospace Engineering Department, North Carolina State University, R3158 Engineering Building 3, Campus Box 7910,911 Oval Drive, Raleigh, NC 27695, USLithium-ion batteries have become a widely-used commodity for satisfying the world’s mobile power needs. However, the mechanical degradation of lithium-ion batteries initiated by micro cracks is considered to be a bottleneck for advancing the current technology. This study utilizes a finite element method-based virtual crack closure technique to obtain particle- and crack-size-dependent estimates of mixed-mode energy release rates and stress intensity factors. Interfacial cracks in orthotropic bi-materials are considered in the current study, whereas the crack extension along the interface is assumed. The results show that energy release rate, stress intensity factor, and the propensity of crack extension are particle- and crack-size- dependent. In particular, our results show that for smaller plate-like LiFePO<sub>4</sub> particles (100 nm × 45 nm), a crack has lesser tendency to extend if crack-to-particle size is less than 0.2, and for 200 nm × 90 nm particles, similar results are obtained for crack-to-particle sizes of less than 0.15. However, for larger particles (500 nm × 225 nm), it requires an almost flawless particle to have no crack extension. Therefore, the current study provides insight into the fracture mechanics of LiFePO<sub>4</sub> and the associated crack-to-particle size dependency to prevent crack extensions.http://www.aimspress.com/Materials/article/626/fulltext.htmlLithium-ion batteriescracksfinite element methodvirtual crack closure techniqueLiFePO<sub>4</sub> |
| spellingShingle | Michael A. Stamps Jeffrey W. Eischen Hsiao-Ying Shadow Huang Particle- and crack-size dependency of lithium-ion battery materials LiFePO<sub>4</sub> AIMS Materials Science Lithium-ion batteries cracks finite element method virtual crack closure technique LiFePO<sub>4</sub> |
| title | Particle- and crack-size dependency of lithium-ion battery materials LiFePO<sub>4</sub> |
| title_full | Particle- and crack-size dependency of lithium-ion battery materials LiFePO<sub>4</sub> |
| title_fullStr | Particle- and crack-size dependency of lithium-ion battery materials LiFePO<sub>4</sub> |
| title_full_unstemmed | Particle- and crack-size dependency of lithium-ion battery materials LiFePO<sub>4</sub> |
| title_short | Particle- and crack-size dependency of lithium-ion battery materials LiFePO<sub>4</sub> |
| title_sort | particle and crack size dependency of lithium ion battery materials lifepo sub 4 sub |
| topic | Lithium-ion batteries cracks finite element method virtual crack closure technique LiFePO<sub>4</sub> |
| url | http://www.aimspress.com/Materials/article/626/fulltext.html |
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