| abstract |
Disclosed in the present invention are a copolymer for a polymer electrolyte, a gel polymer electrolyte comprising same, and a lithium secondary battery. More specifically, disclosed are a copolymer for a polymer electrolyte and a gel polymer electrolyte having improved lithium-ion conductivity by comprising same, the copolymer comprising (A) a fluoropolymer and (B) a unit derived from an acrylate-based monomer or acrylate-based polymer, wherein the unit derived from the acrylate-based monomer or acrylate-based polymer is grafted onto the fluoropolymer, and a weight ratio of the fluoropolymer to the unit derived from the acrylate-based monomer or acrylate-based polymer is 1:99 to 40:60. In addition, the present invention may enable the production of a lithium secondary battery having improved stability at high temperature by comprising the gel polymer electrolyte. |