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US 2025/0019480 A1Published application
Silicon anode binder
AssigneeSolvay Specialty Polymers Italy S.P.A.
InventorsMaurizio Biso, Wojciech Bzducha, Stefano Mauri, David James Wilson
Life of this patent
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Abstract
The present invention relates to a binder for a non-aqueous electrolyte rechargeable battery, a negative electrode slurry for a rechargeable battery, a negative electrode for a rechargeable battery, and a rechargeable battery comprising the same.
Claims18
An aqueous electrode-forming composition [composition (Comp)] for use in the preparation of electrodes for electrochemical devices, characterized by comprising:
- a) at least one polymer (P*) that comprises:
- (A) recurring units derived from at least one monomer (M), which is an ethylenically unsaturated monomer carrying an unsaturated heterocyclic group having at least one nitrogen atom, said monomer (M) having the formula (I) below:
- wherein:
- R1 is H or an alkyl group;
- R2 is H or an alkyl group;
- R3 and R4′ being the same or different from each other, are selected from a hydrogen atom or from a linear or branched alkyl group having 1 to 6 carbon atoms;
- A is a linkage selected from the group consisting of:
- i) a single covalent bond;
- and
- ii) a spacer;
- wherein X, Y and Z, independently from each other, are selected from a carbon atom or a nitrogen atom;
- wherein a, b and c are, independently from each other, selected from the integer 1 to 2;
- wherein each dashed-dotted line represents an optional double bond
- (B) recurring units derived from at least one monomer selected from the group consisting of:
- (B1) at least one α,β-ethylenically unsaturated carboxylic acid monomer [monomer (AA)];
- and
- (B2) at least one (meth)acrylamide monomer [monomer (AM)] of formula (II):
- wherein
- R5 represents a hydrogen atom or a methyl group, R6 and R7 being the same or different from each other, are selected from a hydrogen atom or from a linear or branched alkyl group having 1 to 6 carbon atoms, R8 and R9, being the same or different from each other, are selected from a hydrogen atom, from a linear or branched alkyl group having 1 to 6 carbon atoms, a carboxylic group or an amide group,
- b) an electrode active material,
- c) an aqueous solvent, and
- d) optionally at least one electroconductivity-imparting additive.
19 more elements
A polymer (P) that comprises:
- (A) recurring units derived from at least one monomer (M), which is an ethylenically unsaturated monomer carrying an unsaturated heterocyclic group having at least one nitrogen atom, said monomer (M) having the formula (I) below:
- wherein:
- R1 is H or an alkyl group;
- R2 is H or an alkyl group;
- R3 and R4′ being the same or different from each other, are selected from a hydrogen atom or from a linear or branched alkyl group having 1 to 6 carbon atoms;
- A is a linkage selected from the group consisting of:
- i) a single covalent bond;
- and
- ii) a spacer;
- wherein X, Y and Z, independently from each other, are selected from a carbon atom or a nitrogen atom;
- wherein a, b and c are, independently from each other, are selected from the integer 1 to 2;
- wherein each dashed-dotted line represents an optional double bond
- (B1) recurring units derived from at least one α,β-ethylenically unsaturated carboxylic acid monomer [monomer (AA)];
- and
- (B2) recurring units derived from at least one (meth)acrylamide monomer [monomer (AM)] of formula (II):
- wherein
- R5 represents a hydrogen atom or a methyl group, R6 and R7, being the same or different from each other, are selected from a hydrogen atom or from a linear or branched alkyl group having 1 to 6 carbon atoms, R8 and R9, being the same or different from each other, are selected from a hydrogen atom, from a linear or branched alkyl group having 1 to 6 carbon atoms, a carboxylic group or an amide group.
14 more elements
Dependencies are inferred from the claim text.