Mathematical modeling and reliability analysis of a 3D Li-ion battery
The three-dimensional (3D) Li-ion battery presents an effective solution to issues affecting its two-dimensional counterparts, as it is able to attain high energy capacities for the same areal footprint without sacrificing power density. A 3D battery has key structural features extending in and full...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
International Association of Physical Chemists (IAPC)
2014-02-01
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| Series: | Journal of Electrochemical Science and Engineering |
| Subjects: | |
| Online Access: | http://www.jese-online.org/Articles/Vol_04/No_1/pdf/jESE_Vol4_No1_p1-17_2014.pdf |
| Summary: | The three-dimensional (3D) Li-ion battery presents an effective solution to issues affecting its two-dimensional counterparts, as it is able to attain high energy capacities for the same areal footprint without sacrificing power density. A 3D battery has key structural features extending in and fully utilizing 3D space, allowing it to achieve greater reliability and longevity. This study applies an electrochemical-thermal coupled model to a checkerboard array of alternating positive and negative electrodes in a 3D architecture with either square or circular electrodes. The mathematical model comprises the transient conservation of charge, species, and energy together with electroneutrality, constitutive relations and relevant initial and boundary conditions. A reliability analysis carried out to simulate malfunctioning of either a positive or negative electrode reveals that although there are deviations in electrochemical and thermal behavior for electrodes adjacent to the malfunctioning electrode as compared to that in a fully-functioning array, there is little effect on electrodes further away, demonstrating the redundancy that a 3D electrode array provides. The results demonstrate that implementation of 3D batteries allow it to reliably and safely deliver power even if a component malfunctions, a strong advantage over conventional 2D batteries. |
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| ISSN: | 1847-9286 1847-9286 |