A porous separator for a winding-type lithium secondary battery having a gel-type
polymer electrolyte includes a matrix made of polyvinyl chloride, or a matrix made
of mixtures of polyvinylchloride and at least one polymer selected from the group
consisting of polyvinylidenefluoride, a vinylidenefluoride/hexafluoropropylene
copolymer, polymethacrylate, polyacrylonitrileand polyethyleneoxide.
