| abstract |
An organic / inorganic composite porous separator (membrane), a method for producing the same, and an electrochemical device including the organic / inorganic composite porous separator (membrane) are provided. An inorganic particle in one or more regions selected from the group consisting of (a) a polyolefin-based film substrate, and (b) a surface of the substrate and a part of pores present in the substrate. And an active layer coated with a mixture of a specific binder polymer, and the active layer connects inorganic particles with the binder polymer, and an empty space between the inorganic particles (Interstitial Volume: Interstitial Volume). Porous polymer film in which pore structure is formed by volume. [Selection] Figure 1 |