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US 12,394,822 B2Granted
Polymer electrolyte for a lithium metal polymer battery having improved performance
AssigneesBlue Solutions, Institut Polytechnique De Grenoble, Universite 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
Life of this patent
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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 wherein said cross-linked copolymer is obtained by cross-linking a triblock copolymer having a BAB structure, in which:
- an A block is a cross-linkable poly(alkylene oxide) comprising cross-linkable alkene or alkyne functions uniformly distributed within said A block, said A block being obtained by reacting:
- i) 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,
- with
- ii) at least one compound comprising at least one cross-linkable alkene or alkyne function,
- said A block comprising a functional polymer having the following formula (II):
- —[CoA—R1]p— (II)
- in which R1 is a substituent comprising at least one cross-linkable alkene or alkyne function selected from the alkyl radicals containing at least one alkene or alkyne function, said substituent R1 comprising from 4 to 10 carbon atoms;
- CoA is a poly(alkylene oxide) chain selected from the poly(ethylene oxide), poly(propylene oxide), poly(ethylene and propylene) oxide chains, and one of the mixtures thereof;
- and p is comprised between 10 and 50, 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.
9 more elements
A solid polymer electrolyte, wherein it comprises at least one 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 wherein said cross-linked copolymer is obtained by cross-linking a triblock copolymer having a BAB structure, in which:
- an A block is a cross-linkable poly(alkylene oxide) comprising cross-linkable alkene or alkyne functions uniformly distributed within said A block, said A block being obtained by reacting:
- i) 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,
- with
- ii) at least one compound comprising at least one cross-linkable alkene or alkyne function selected from the compounds having the following formula (IV):
- X—R′1—X′ (IV)
- in which R′1 is an alkyl group comprising at least one alkene or alkyne function, said alkylene group comprising from 4 to 10 carbon atoms;
- and X and X′, identical or different, are selected independently of one another, from the halogen, carboxylic acid, acyl chloride, ester and aldehyde functions, 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, and
- and at least one plasticizer comprising from 10-40% by weight, with respect to the total weight of the solid polymer electrolyte.
8 more elements
Dependencies are inferred from the claim text.