	US 12,107,271 B2
	Binder aqueous solution for lithium ion battery, slurry for negative electrode of lithium ion battery, negative electrode for lithium ion battery, and lithium ion battery
Shinji Ozaki, Osaka (JP); Naoki Sasagawa, Osaka (JP); and Hideki Goda, Osaka (JP)
Assigned to ARAKAWA CHEMICAL INDUSTRIES, LTD., Osaka (JP)
Filed by ARAKAWA CHEMICAL INDUSTRIES, LTD., Osaka (JP)
Filed on Mar. 29, 2021, as Appl. No. 17/214,939.
Claims priority of application No. 2020-059968 (JP), filed on Mar. 30, 2020.
Prior Publication US 2021/0305574 A1, Sep. 30, 2021
Int. Cl. H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)

CPC H01M 4/622 (2013.01) [H01M 2004/027 (2013.01); H01M 10/0525 (2013.01)]

6 Claims

1. A binder aqueous solution for a lithium ion battery, having a pH of 5 to 8 and containing:

a water-soluble polymer (A), wherein the water-soluble polymer (A) is a polymer of a monomer group containing, with respect to 100 mol % of the monomer group, 15 mol % to 40 mol % of an unsaturated carboxylic acid or an inorganic salt thereof, 3 mol % to 40 mol % of a (meth)acrylamide group-containing compound, and has a glass transition temperature of 110° C. or lower; and

a hydrolyzed partial condensate (B) of an amino group-containing trialkoxysilane, and a degree of condensation of the hydrolyzed partial condensate of the amino group-containing trialkoxysilane being 1.01 to 1,000, wherein the amino group-containing trialkoxysilane is selected from the group consisting of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, N-2-(aminoethyl)3-aminopropyltrimethoxysilane, N-2-(aminoethyl)-3-aminopropyltriethoxysilane, and 3-triethoxysilyl-N-(1,3-dimethyl-butylidene)propylamine.