BINDER COMPOSITION FOR SECONDARY BATTERY NEGATIVE ELECTRODE, NEGATIVE ELECTRODE FOR SECONDARY BATTERY, NEGATIVE ELECTRODE SLURRY COMPOSITION, MANUFACTURING METHOD, AND SECONDARY BATTERY

A binder composition for a negative electrode of a secondary battery, including a particulate binder, and a water-soluble polymer containing an acidic functional group, wherein the water-soluble polymer has an ion conductivity of 1 × 10 -5 to 1 × 10 -3 S/cm; and a swelling degree of the water-soluble polymer to a liquid with a solubility parameter of 8 to 13 (cal/cm 3 ) 1/2 is 1.0 to 2.0 times a swelling degree of the particulate binder measured under the same conditions; and use thereof.