Negative electrode agent for nonaqueous electrolyte secondary battery, negative electrode for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery

A negative electrode agent for nonaqueous electrolyte secondary batteries prepared by

• drying an aqueous dispersion comprising an active material, which is dispersed in water, and a binder, which is dissolved in water;
• wherein the binder contains a) a crosslinked polymer formed by crosslinking a first water-soluble, linear polymer, which is a polycarboxylic acid salt, and b) a second water-soluble, linear polymer, which is a polycarboxylic acid, wherein a molecular weight of the first water-soluble, linear polymer is higher than a molecular weight of the second water-soluble, linear polymer and wherein the molecular weight of the second water-soluble, linear polymer is from 1,000 to 10,000.

A negative electrode agent for nonaqueous electrolyte secondary batteries prepared by

• drying an aqueous dispersion comprising an active material, which is dispersed in water, and a binder, which is dissolved in water;
• wherein the binder contains a) a crosslinked polymer formed by crosslinking a first water-soluble, linear polymer, which is a polycarboxylic acid salt, and b) a second water-soluble, linear polymer, which is a polycarboxylic acid, wherein a molecular weight of the first water-soluble, linear polymer is higher than a molecular weight of the second water-soluble, linear polymer, wherein the active material contains SiOx, 0≤x≤1.5, while not containing a graphite.