abstract |
The present invention provides a coating material comprising a porous substrate, a binder dispersed or suspended in a specific size, and optionally inorganic particles. The present invention relates to an organic / inorganic composite coating porous separator including an inorganic composite coating layer and a secondary battery device including the same. According to the present invention, by coating / drying a coating liquid including a binder dispersed in a solvent to a specific size or less on a porous substrate, a secondary separator including an organic / inorganic composite coating porous separator having excellent air permeability and adhesion and the organic / inorganic composite coating porous separator A battery element is provided. |