Plasticized microporous poly(vinylidene fluoride) separators for lithium-ion batteries. III. Gel properties and irreversible modifications of poly(vinylidene fluoride) membranes under swelling in liquid electrolytes |
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| Authors: | J. Saunier F. Alloin J. Y. Sanchez L. Maniguet |
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| Affiliation: | 1. Laboratoire d'Electrochimie et de Physico-Chimie des Matériaux et des Interfaces, Unité Mixte de Recherche (UMR) 5631 Centre National de la Recherche Scientifique-Institut National Polytechnique de Grenoble (CNRS-INPG) Associé à l'Univesité Joseph Fourier, BP 75, 38402 Saint-Martin-d'Hères, France;2. Consortium des Moyens Technologiques Communs. Bâtiment Ecole Nationale Supérieure d'Electrochìmie et d'Electrometallurgie de Grenoble (CMTC Bât ENSEEG), Domaine Universitaire, 1260 Rue de la Piscine, BP 75, 38402 Saint Martin d'Hères, Cedex, France |
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| Abstract: | Microporous poly(vinylidene fluoride) (PVdF) separators for lithium-ion batteries, used in liquid organic electrolytes, have been characterized with respect to the swelling phenomena on dense PVdF membranes (obtained through hot pressing). In the first and second parts of this study, we have described the swelling equilibria and swelling kinetics of dense PVdF. Here the thermal properties of PVdF gels and their irreversible modifications induced by swelling are characterized. Particular attention is paid to crystallinity modifications, polymer plasticization, and membrane degradation. © 2004 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 2308–2317, 2004 |
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| Keywords: | polymer electrolytes lithium batteries gels poly(vinylidene fluoride) (PVdF) thermal characterization fluoropolymers gels |
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