MANUFACTURING METHOD OF ORGANIC-INORGANIC HYBRID POROUS SEPERATION MEMBRANE AND ORGANIC-INORGANIC HYBRID POROUS SEPERATION MEMBRANE USING THE SAME METHOD

摘要

The present invention relates to a method for manufacturing an organic-inorganic porous separation membrane and the organic-inorganic porous separation membrane manufactured thereby. Provided is the organic-inorganic porous separation membrane which includes a porous polyolefin substrate and an active layer coated with an organic-inorganic hybrid aggregate which is aggregated by the ionic interaction of an acryl-based polymer and an inorganic particle which includes an organic-inorganic hybrid complex or an active site obtained by modifying the active site of the inorganic particle into the acryl-based polymer on the surface of the substrate. The organic-inorganic porous separation membrane for a secondary battery according to the present invention obtains high battery properties by preventing the degradation of safety due to the inner short circuit of an anode and a cathode under an excessive condition like a high temperature and an overcharge by high mechanical and thermal properties. More particularly, provided is the organic-inorganic porous separation membrane capable of improving the electrical stability of the secondary battery by remarkably reducing the separation of ceramic particles and improving the adhesion of a porous base and a coating layer. Also, the porous separation membrane according to the present invention obtains high adhesion with the base in comparison with an existing separation membrane and obtains high ion conductivity and a high battery capacity preservation ratio.