Polymer electrolyte for a lithium metal polymer battery having improved performance
AssigneesBlue Solutions, Institut Polytechnique De Grenoble, Université d' Aix-Marseille, Centre National De La Recherche Scientifique
InventorsMarc DESCHAMPS, Margaud LECUYER, Renaud BOUCHET, Ekaterina PAVLENKO, Adrien LASSAGNE, Didier GIGMES, Adèle FERRAND, Phan TRANG
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Abstract
A cross-linked copolymer is provided, including at least repeating units of poly(alkylene oxide) and at least repeating units of lithium polystyrene-sulfonyl(trifluoromethylsulfonyl)imide (PSTFSILi), as well as the use of such a cross-linked copolymer for preparing a solid polymer electrolyte, a solid polymer electrolyte having the cross-linked copolymer, and a battery, for example a lithium metal polymer (LMP) battery, including the solid polymer electrolyte.
Claims16
A cross-linked copolymer, comprising:
- at least repeating units of lithium polystyrene-sulfonyl(trifluoromethylsulfonyl)imide (PSTFSILi) and at least repeating units of poly(alkylene oxide) selected from poly(ethylene oxide) units, poly(propylene oxide) units, poly(ethylene and propylene) oxide units, and one of the mixtures thereof, and in that said cross-linked copolymer is obtained by cross-linking a triblock copolymer of the BAB type, in which:
- an A block is a cross-linkable poly(alkylene oxide) capable of being obtained from:
- at least one monomer selected from ethylene glycol, propylene glycol and mixture thereof, or at least one poly(alkylene oxide) oligomer selected from poly(ethylene oxide)s, poly(propylene oxide)s, poly(ethylene and propylene) oxides, and one of the mixtures thereof,
- and
- at least one compound comprising at least one cross-linkable alkene or alkyne function, and
- each B block is an anionic polystyrene substituted by the anion of a lithium sulfonyl(trifluoromethylsulfonyl)imide (TFSILi) and corresponding to the following formula (I):
- in which n denotes the number of lithium styrene-sulfonyl(trifluoromethylsulfonyl)imide for each of the B blocks.
Dependencies are inferred from the claim text.