Binder aqueous solution for lithium ion battery electrode, slurry for lithium ion battery negative electrode, negative electrode for lithium ion battery, and lithium ion battery

Abstract

[Technical Problem] Provide an aqueous binder solution for lithium-ion battery electrodes, a slurry for lithium-ion battery negative electrodes, a negative electrode for lithium-ion batteries, and a lithium-ion battery. [Technical Means] The present disclosure provides an aqueous binder solution for lithium-ion batteries, the aqueous binder solution for lithium-ion batteries comprising a water-soluble polymer (A) containing an acidic group and a water-soluble polymer (B) containing an amino group, the water-soluble polymer (A) containing an acidic group being a polymer of a monomer group, relative to 100 mol % of the monomer group, the monomer group comprising 30 mol % to 90 mol % of a (meth)acrylamide-containing compound (a), 3 mol % to 20 mol % of an unsaturated organic acid (b), and 5 mol % to 40 mol % of an alkali metal or alkaline earth metal salt (c) of an unsaturated organic acid; the pH of a 1 mass % aqueous solution of the water-soluble polymer (B) containing an amino group is 9 or above.

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