Binder composition for secondary battery
AssigneeGrst Singapore Pte. Ltd.
InventorsKam Piu Ho, Yingkai Jiang, Tao Gong
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Abstract
Provides an aqueous binder composition for a secondary battery electrode, comprising a copolymer and a dispersion medium, wherein the copolymer comprises a structural unit (a), a structural unit (b), and a structural unit (c). The binder composition disclosed herein has improved binding capability. In addition, battery cells comprising electrodes prepared using the binder composition disclosed herein exhibits exceptional electrochemical performance.
Claims19
A binder composition for a secondary battery electrode comprising a copolymer and a dispersion medium, wherein the copolymer comprises a structural unit (a) derived from a monomer containing an acid group selected from the group consisting of carboxylic acid, sulfonic acid, sulfuric acid, phosphonic acid, phosphoric acid, nitric acid, their salts, their derivatives, and combinations thereof;
- a structural unit (b) derived from a monomer selected from the group consisting of an amide group-containing monomer, a hydroxyl group-containing monomer, and combinations thereof;
- a structural unit (c) derived from a monomer selected from the group consisting of a nitrile group-containing monomer, an ether group-containing monomer, an epoxy group-containing monomer, a carbonyl group-containing monomer, a fluorine-containing monomer, and combinations thereof;
- wherein the proportion of structural unit (b) in the copolymer is from about 4% to about 25% 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 a structural unit derived from an ester group-containing monomer and a structural unit derived from a conjugated diene group-containing monomer.
Dependencies are inferred from the claim text.