| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Low Density Advanced Composite Materials
|
| Presentation Title |
Effect of Battery Charge-discharge Cycles on the Mechanical Behavior of Porous Polyethylene Separators |
| Author(s) |
Mustapha Makki, Georges Y. Ayoub, Cheol Lee |
| On-Site Speaker (Planned) |
Georges Y. Ayoub |
| Abstract Scope |
Separators play a crucial role in lithium-ion batterie’s safety and performance. The separators are porous polymer films sandwiched between the anode and cathode to prevent the contact. Under electrical charge-discharge cycles, the separators are subjected to mechanical and thermal loadings that induce mechanical and material properties degradation. Hence, an accurate characterization of the separator degradation under charge-discharge cycles is essential for designing commercial lithium-ion batteries. In this work, an anisotropic time-dependent continuum damage model was implemented as UMAT in a commercial FEM software to capture the mechanical behavior of polyethylene separators at different charge-discharge cycles. A hybrid method that combines experimental biaxial loading experiments and FEM simulations was used to model the mechanical behavior degradation of the porous separators. The theory of network and viscoplastic properties alteration was used for that purpose. |