About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Presentation Title |
3D Printing of Highly Porous Polypropylene Separators for Lithium-Ion Batteries Using Fused Deposition Modeling and Thermally Induced Phase Separation |
Author(s) |
Alexis Maurel, Abraham Enchinton, Katherine R. Gonzalez, Christian A. Fernandez, Sivasai Balivada, Laura C. Merrill, Jorge A. Cardenas, Stéphane Panier, Ana C. Martinez |
On-Site Speaker (Planned) |
Alexis Maurel |
Abstract Scope |
This presentation will focus on the additive manufacturing of custom-shape porous separators for lithium-ion batteries using fused deposition modeling (FDM). The development and optimization of a composite thermoplastic filament feedstock combining a polymer matrix and a waxy material, followed by the 3D printing of the separator is shown. A post-processing step, based on thermal induced phase separation (TIPS), promotes porosity formation through the removal of the waxy sacrificial phase. Separators with different polymer/wax ratio are developed and the impact on printability, mechanical strength, porosity, and electrochemical performances is discussed and compared to a commercial separator. This pioneering use of FDM and TIPS not only establishes a foundation for the creation of porous separators that can adapt to and conform into 3D printed battery architectures, but also creates opportunities for other applications that employ porous structures beyond energy storage applications.
SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |