BINDER FOR NEGATIVE ELECTRODE OF LITHIUM SECONDARY BATTERY AND NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY INCLUDING THE SAME

Provided are a negative electrode for a lithium secondary battery having excellent dispersibility, adhesion and tensile strength, and a lithium secondary battery including the same. The negative electrode for a lithium secondary battery includes a negative electrode active material, conductive material and a binder, wherein the binder includes a copolymer containing acrylamide monomer-derived repeating units, acrylic acid monomer-derived repeating units, sodium acrylate monomer-derived repeating units and acrylonitrile monomer-derived repeating units, wherein the combined weight of the acrylic acid monomer-derived repeating units and the sodium acrylate monomer-derived repeating units in the copolymer is 25-35 wt%. The negative electrode active material particles are silicon-based negative electrode active material particles.