<![CDATA[This study developed a polyvinylidene fluoride based lithium-ion battery separator reinforced with polyurethane to improve its electrochemical performance, thermal stability, and dimensional stability. The primary objective of this research was to fabricate a PVDF-based separator modified with polyurethane to enhance its performance, thermal resistance, and shrinkage resistance. The separators were fabricated using the casting method with PVDF to polyurethane weight ratios of 2:8, 3:7, 5:5, 6:4, 7:3, 8:2, 9:1, and 10:0, and immersion times of 1, 2, and 3 days. The casting process was carried out by casting the polymer solution between two ITO glass substrates. The results showed that the 7:3 PVDF to polyurethane ratio produced the optimum membrane thickness of 20 μm, meeting the standard thickness requirement for lithium-ion battery separators (25 μm). Thermal characterization using Thermogravimetric Analysis (TGA) demonstrated that the membrane fabricated by the casting method remained thermally stable up to 300°C, followed by rapid thermal degradation between 300°C and 400°C. Morphological characterization using Scanning Electron Microscopy (SEM) revealed that the membrane surface contained numerous micropores distributed throughout the membrane. Although the pore distribution was not entirely homogeneous and some material agglomeration was observed, the abundance of micropores indicates that the membrane fabrication process successfully created ion transport pathways essential for lithium-ion battery separator applications.Keywords: Separator, Battery, LIB, PVDF, Poliuretan, Casting.]]>
Copyrights © 2026
