(assignment) The present invention provides an aqueous solution of thermally crosslinkable binder for lithium ion batteries, thermally crosslinkable slurry for negative electrodes of lithium ion batteries, negative electrodes for lithium ion batteries, and lithium ion batteries. (Solution) The present invention relates to 2 to 60 mol% of structural units derived from the (meth)acrylamide group-containing compound (a), and at least one unsaturated acid selected from the group consisting of unsaturated carboxylic acids and unsaturated sulfonic acids or inorganic salts thereof (b) 0.5-30 mol% of water-soluble poly(meth)acrylamide (A) containing 10-50 mol% of structural units derived from It provides an aqueous solution of a thermally crosslinkable binder for lithium ion batteries comprising.
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