Slurry composition for negative electrode of lithium ion secondary cell, negative electrode of lithium ion secondary cell, and lithium ion secondary cell

Abstract

To provide a slurry composition for a negative electrode of a lithium ion secondary cell, whereby a secondary cell having excellent cycle characteristics and output characteristics can be obtained, and whereby an electrode having excellent adhesion can be obtained. [Solution] This slurry composition for a negative electrode of a lithium ion secondary cell comprises a negative electrode active material, an aqueous dispersion binder, and water, and is characterized in that the specific surface area of the negative electrode active material is 3.0-20.0 m2/g, the aqueous dispersion binder is a polymer that contains dicarboxylic acid-containing monomer units and sulfonic acid-containing monomer units, the content ratio of dicarboxylic acid-containing monomer units in the polymer is 2-10% by mass, the content ratio of sulfonic acid-containing monomer units is 0.1-1.5% by mass, and the potassium ion content in the slurry composition is no more than 1000 ppm with respect to 100% by mass of the slurry composition.

Dependencies are inferred from the claim text.