Phase-Field Methods for Deformation Processes in Lithium-Ion Batteries
- A fast numerical method for an advanced electro-chemo-mechanical model is developed which is able to capture phase separation processes in porous materials. This method is applied to simulate lithium-ion battery cells, where the complex microstructure of the electrodes is fully resolved. The intercalation of ions into the popular cathode material LFP leads to a separation into lithium-rich and lithium-poor phases. The large concentration gradients result in high mechanical stresses. A phase-field method applying the Cahn-Hilliard equation is used to describe the diffusion. For the sake of simplicity, the linear elastic case is considered. Numerical tests for fully resolved three-dimensional granular microstructures are discussed in detail.
| Author: | Tobias Hofmann |
|---|---|
| URN: | urn:nbn:de:hbz:386-kluedo-52196 |
| ISBN: | 978-3-942695-15-2 |
| Series (Serial Number): | Forschungsbericht / Technische Universität Kaiserslautern, Lehrstuhl für Technische Mechanik (15) |
| Advisor: | Heiko Andrä |
| Document Type: | Doctoral Thesis |
| Language of publication: | English |
| Date of Publication (online): | 2018/04/26 |
| Date of first Publication: | 2018/04/26 |
| Publishing Institution: | Technische Universität Kaiserslautern |
| Granting Institution: | Technische Universität Kaiserslautern |
| Acceptance Date of the Thesis: | 2018/01/08 |
| Date of the Publication (Server): | 2018/04/27 |
| Page Number: | XVI, 161 |
| Faculties / Organisational entities: | Kaiserslautern - Fachbereich Maschinenbau und Verfahrenstechnik |
| DDC-Cassification: | 5 Naturwissenschaften und Mathematik / 510 Mathematik |
| 6 Technik, Medizin, angewandte Wissenschaften / 620 Ingenieurwissenschaften und Maschinenbau | |
| Licence (German): |  Creative Commons 4.0 - Namensnennung, nicht kommerziell, keine Bearbeitung (CC BY-NC-ND 4.0) |