Polyvinylidene fluoride nanofiber coated polypropylene nonwoven fabric as a membrane for lithium-ion batteries |
| |
| Authors: | Davoud Amini Erfan Oliaei Mehdi Rajabi-Hamane Hossein Mahdavi |
| |
| Institution: | 1.School of Chemical Engineering, College of Engineering,University of Tehran,Tehran,Iran;2.Department of Chemical and Polymer Engineering, Faculty of Engineering,Yazd University,Yazd,Iran;3.School of Chemistry, College of Science,University of Tehran,Tehran,Iran |
| |
| Abstract: | Polyvinylidene fluoride (PVdF) membranes in spite of having many critical properties necessary for lithium-ion batteries, do not have satisfying thermal and mechanical resistance. The goal of this study was to combine the good mechanical and thermal properties of PP nonwoven fabric with the excellent electrochemical properties of PVdF nanofibers to exploit a high-performance membrane for lithium-ion batteries. This work reports the preparation of PVdF nanofiber membranes using electrospinning on a polypropylene (PP) spunbonded nonwoven fabric and an aluminum foil followed by a hot-pressing treatment. The morphology and size of the membranes were studied by the scanning electron microscopy. The tensile strength of the membrane with the PP support was superior to the PVdF membrane. Thermal stability of the prepared membranes was determined using the TGA method and the dimensional stability was investigated by measuring the shrinkage ratio at 105 °C. The results have shown that the PVdF/PP membrane was thermally more stable than the PVdF and the commercial Celgard 2325 membranes. The batteries using PVdF/PP membrane exhibited higher electrochemical oxidation limit, better cycling performance and less discharge capacity fading during 100 cycles compared to PVdF and Celgard membranes. The results of this study showed that PVdF/PP membrane is a promising advanced membrane in lithium-ion batteries. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
