Binder composition for secondary battery
AssigneeGrst Singapore Pte. Ltd.
InventorsKam Piu Ho, Yingkai Jiang, Hongke Qiu
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Abstract
An aqueous binder composition for a positive electrode of a secondary battery electrode, comprising a copolymer and a dispersion medium, wherein the copolymer comprises a structural unit (a) derived from a carboxylic acid group-containing monomer, a structural unit (b) derived from an amide group-containing monomer and a structural unit (c) derived from a nitrile group-containing monomer, with an improved binding capability. In addition, battery cells comprising the cathode prepared using the binder composition disclosed herein exhibits exceptional electrochemical performance.
Claims20
A binder composition for a secondary battery electrode comprising a copolymer, wherein the copolymer comprises a structural unit (a) derived from a carboxylic acid group-containing monomer, a structural unit (b) derived from an amide group-containing monomer and a structural unit (c) derived from a nitrile group-containing monomer,
- wherein a proportion of structural unit (a) derived from a carboxylic acid group-containing monomer in the copolymer is from about 7% to about 25% by mole, based on the total number of moles of monomeric units in the copolymer in the binder composition,
- wherein a proportion of structural unit (b) derived from an amide group-containing monomer in the copolymer is from about 4% to about 17% by mole, based on the total number of moles of monomeric units in the copolymer in the binder composition,
- wherein a proportion of structural unit (c) derived from a nitrile group-containing monomer in the copolymer is from 67% to about 80% by mole, based on the total number of moles of monomeric units in the copolymer in the binder composition, and
- wherein the binder composition is free of structural unit derived from an ester group-containing monomer.
Dependencies are inferred from the claim text.