Thermally crosslinkable binder aqueous solution for lithium-ion battery, thermally crosslinkable slurry for lithium-ion battery negative electrode, negative electrode for lithium-ion battery, lithium-ion battery negative electrode material, and lithium-ion battery and method for producing the same

A lithium-ion battery negative electrode material, obtained by applying a thermally crosslinkable slurry for a lithium-ion battery negative electrode to a current collector and drying the same, wherein

• the thermally crosslinkable slurry for a lithium-ion battery negative electrode contains a water-soluble poly(meth)acrylamide (A), water and a negative electrode active material, wherein the water-soluble poly(meth)acrylamide (A) is a polymer of a monomer group containing, with respect to 100 mol % of the monomer group,
• 2 mol % to 60 mol % of a (meth)acrylamide group-containing compound (a),
• 10 mol % to 50 mol % of one or more unsaturated acids selected from the group consisting of unsaturated carboxylic acids and unsaturated sulfonic acids or an inorganic salt thereof (b), and
• 15 mol % to 78 mol % of hydroxyalkyl(meth)acrylate (c) having a hydroxyalkyl group having 2 to 4 carbon atoms, wherein
• a negative electrode active material layer comprising a dried product of the thermally crosslinkable slurry for a lithium-ion battery negative electrode has a water concentration of 0.3% to 1.0%, and the water-soluble poly(meth)acrylamide (A) after drying is not crosslinked.