ORGANIC / INORGANIC COMPOSITE SEPARATOR, METHOD FOR MANUFACTURING AN ORGANIC / INORGANIC COMPOSITE SEPARATOR AND ELECTROCHEMICAL DEVICE

摘要

organic / inorganic compound separator having morphology gradient, method of fabrication thereof and electrochemical device containing same The present invention provides an organic / inorganic compound separator comprising: a porosophosphate substrate; and a porous active layer containing a mixture of inorganic particles and a binder polymer with which at least one surface of the porous substrate is coated. The organic / inorganic composite separator of the present invention may be useful for enhancing peeling and scratch resistance and may improve a lamination characteristic by introducing a porous active layer onto a porous substrate having pores, the porous active layer having morphological heterogeneity to a thickness direction in which a content rate of the binder polymer / inorganic particles present on a surface layer is higher than that of the binder polymer / inorganic particles present within the surface layer. consequently, the stability and performance of a battery may be improved together as the separation of inorganic particles from the porous active layer may be reduced during the electrochemical device assembly process.