Abstract: The present disclosure aims at providing a gel polymer electrolyte which has a great effect of inhibiting leakage of an organic solvent by confining the organic solvent in a three-dimensional polymer network and has oxidation stability, flame retardancy, thermal stability, and excellent lithium ion conductivity. In order to achieve the above object, the present disclosure provides a gel polymer electrolyte including a cross-linked polymer having a thiol-ene structure, wherein the thiol-ene structure is formed by a click reaction of a thiol group of a thiol compound containing at least four reactive thiol groups per molecule and an acrylic group of a fluorinated polyether diacrylate.

Abstract: Provided is a composition for forming a gel polymer electrolyte which includes a lithium salt; an organic solvent; and a crosslinking compound represented by Formula 1: wherein in Formula 1, L1, L2, L3, and L4 are each independently a direct bond or an alkylene group having 1 to 3 carbon atoms, L5 and L6 are each independently an alkylene group having 1 to 20 carbon atoms in which at least one methylene group may be substituted with an ether group and at least one hydrogen is substituted with fluorine, and R1 and R2 are each independently hydrogen, an alkyl group having 1 to 3 carbon atoms, or a halogen.

Abstract: The present disclosure aims at providing a gel polymer electrolyte which has a great effect of inhibiting leakage of an organic solvent by confining the organic solvent in a three-dimensional polymer network and has oxidation stability, flame retardancy, thermal stability, and excellent lithium ion conductivity. In order to achieve the above object, the present disclosure provides a gel polymer electrolyte including a cross-linked polymer having a thiol-ene structure, wherein the thiol-ene structure is formed by a click reaction of a thiol group of a thiol compound containing at least four reactive thiol groups per molecule and an acrylic group of a fluorinated polyether diacrylate.

Abstract: The present invention relates to a precursor composition for a polymer electrolyte including two types of crosslinking agents and a gel polymer electrolyte formed therefrom.