High-molecular compound, intermediate composition, negative electrode, electrical storage device, slurry for negative electrode, method for producing high-molecular compound, and method for producing negative electrode

A polymer compound for use as a binder for a negative electrode of an electrical storage device, comprising:

• a chain structure constituted by polyacrylic acid;
• and
• a crosslinked structure connecting carboxylic acid side chains within the chain structure or between the chain structures, wherein
• the crosslinked structure includes at least one crosslinked structure selected from the group consisting of the following formulas (2) to (4),
• PAA represents the chain structure constituted by polyacrylic acid, X represents a structure represented by the following formula (5),
• Y represents a straight chain alkyl group having 1 to 4 carbon atoms, a phenylene group, or an oxygen atom, and
• R1 and R2 each independently represent one or more hydrogen atoms, methyl groups, ethyl groups, trifluoromethyl groups, or methoxy groups.

An intermediate composition for a polymer compound for use as a binder for a negative electrode of an electrical storage device, comprising:

• polyacrylic acid;
• a multifunctional amine represented by the following formula (1);
• and
• a nonaqueous solvent, wherein
• Y represents a straight chain alkyl group having 1 to 4 carbon atoms, a phenylene group, or an oxygen atom, and
• R1 and R2 each independently represent one or more hydrogen atoms, methyl groups, ethyl groups, trifluoromethyl groups, or methoxy groups.