Manufacturing method of a separator for a lithium secondary battery and an organic electrolyte lithium secondary battery using the same separator

A manufacturing method for producing a separator for a lithium secondary battery including:

• oxidizing a separator matrix having a microporous membrane comprising a polyolefin selected from the group consisting of polyethylene, polypropylene, and combinations thereof by plasma irradiation for a time sufficient to perform a lyophilic treatment,
• impregnating a mixed solution into said separator matrix, wherein said mixed solution is produced by adding a mixture comprising an oligomer and a monomer with said mixed solution being capable of being polymerized into an organic electrolyte by ultra violet irradiation, and
• developing said separator matrix on a glass board having a surface coated by at least one fluoroplastic material by irradiating ultraviolet ray through said glass board to polymerize said mixed solution to produce a separator matrix comprising an ionic conductive gel electrolyte.

A manufacturing method for producing a separator for a lithium secondary battery comprising the steps of:

• treating a microporous membrane comprising a polyolefin to produce a separator matrix having a surface which is lyophilic,
• impregnating said separator matrix with a solution comprising a resin capable of being polymerized by ultraviolet radiation and an organic electrolyte, and
• developing said impregnated separator matrix on a glass board having a surface coated with at least one fluoroplastic material by irradiating ultraviolet rays through said glass board to polymerize said solution to produce a separator matrix comprising an ionic conductive gel electrolyte.