Patent ID: 7288339

Claim:
A lithium secondary battery comprising: a current collector, a cathode and an anode having each active material layer formed on the current collector; and a polymer electrolyte interposed between the cathode and the anode, wherein a fluorine resin exists in pores between constituents contained in at least one active material layer of the cathode and the anode, the polymer electrolyte is a polymerized product of a crosslinking monomer and an electrolytic solution including a lithium salt and an organic solvent, and a porous membrane made of an insulating resin is interposed between the cathode and the anode, and wherein the crosslinking monomer is at least one selected from the group consisting of hexyl acrylate, butyl acrylate, trimethylolpropane triacrylate (TMPTA), butanediol dimethacrylate, diallylsuberate, ethylene glycol dimethacrylate, poly(ethyleneglycol) dimethylacrylate, diglycidyl ester, acrylamide and divinyl benzene.