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,
polyacrylonitrile and polyethyleneoxide.