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US 12,494,488 B2Granted
High performance binders for lithium battery electrodes
AssigneeSYENSQO SPECIALTY POLYMERS ITALY S.p.A.
InventorsJulio A. Abusleme, Ségolène Brusseau, Andrea Vittorio Oriani, Michele Fiore, Roberto Biancardi
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Abstract
The present invention pertains to vinylidene fluoride copolymers comprising recurring units derived from hydrophilic monomers and to their use as binder for electrodes in Li-ion batteries.
Claims20
A fluoropolymer, polymer (F), comprising:
- (i) recurring units derived from vinylidene fluoride (VDF) monomer;
- (ii) recurring units derived from at least one vinyl monomer (HA) of formula (I)
- R1R2C═CR3—Rx (I)
- wherein R1, R2 and R3, equal to or different from each other, are independently selected from a hydrogen atom, a halogen atom, and a C1-C5 hydrocarbon group, and wherein Rx is a is a C3-C20 linear or branched hydrocarbon chain moiety comprising at least two functional groups independently selected from the group consisting of ether epoxy, per-carbonate, and ester;
- (iii) recurring units derived from at least one carboxyl group-containing vinyl monomer (CA), wherein monomer (CA) is different from monomer (HA);
- wherein the total amount of monomer (HA) and monomer (CA) in said polymer (F) is of at most 5.0% by moles, with respect to the total moles of recurring units of polymer (F);
- and
- wherein at least 50% of monomer (CA) is randomly distributed into said polymer (F).
5 more elements
A fluoropolymer, polymer (F), comprising:
- (i) recurring units derived from vinylidene fluoride (VDF) monomer;
- (ii) recurring units derived from at least one vinyl monomer (HA) of formula (I)
- R1R2C═CR3—Rx (I)
- wherein R1, R2 and R3, equal to or different from each other, are independently selected from a hydrogen atom, a halogen atom, and a C1-C5 hydrocarbon group, and wherein Rx is a is a C3-C20 linear or branched hydrocarbon chain moiety comprising at least two functional groups independently selected from the group consisting of ether, ketone, epoxy, per-carbonate, and ester;
- (iii) recurring units derived from at least one carboxyl group-containing vinyl monomer (CA), wherein monomer (CA) is different from monomer (HA);
- wherein the total amount of monomer (HA) and monomer (CA) in said polymer (F) is of at most 5.0% by moles, with respect to the total moles of recurring units of polymer (F);
- wherein at least 50% of monomer (CA) is randomly distributed into said polymer (F), and
- wherein polymer (F) further comprises comonomer (CF) in an amount of from 0.1 to 10.0% by moles with respect to the total moles of recurring units of polymer (F), wherein comonomer (CF) is a fluorinated monomer different from VDF.
5 more elements
Dependencies are inferred from the claim text.