Novel polymeric systems for lithium ion batteries gel electrolytes: II. Hybrid cross-linked poly(fluorosilicone-ethyleneoxide)

G.B. Appetecchi, F. Alessandrini, S. Passerini, G. Caporiccio, B. Boutevin, F. Guida-Pietrasanta

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Abstract

Cross-linked, self-supporting, membranes for lithium ion battery gel electrolytes were obtained by cross-linking a mixture of polyfluorosilicone (PFSi) and polysilicone containing ethylene oxide (EO) units [P(Si-EO)]. The membranes were also reinforced with nanosized silica. The two polymer precursors were synthesized with functional groups capable to form inter-molecular cross-linking, thus obtaining three-dimensional, polymer matrices. The precursors were dissolved in a common solvent and cross-linked to obtain free-standing PFSi/P(Si-EO):SiO2composite films. The latter were undergone to swelling processes in (non-aqueous, aprotic, lithium salt containing) electrolytic solutions to obtain gel-type polymer electrolytes. The properties of the swelled PFSi/P(Si-EO):SiO2samples were evaluated as a function of the electrolytic solutions and the dipping time. The PFSi/P(Si-EO):SiO2membranes exhibited large swelling properties, high ionic conductivity and good electrochemical stability. © 2005 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)4396 - 4404
Number of pages9
JournalElectrochimica Acta
Volume50
Issue number22
DOIs
Publication statusPublished - 10 Aug 2005

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All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

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