| abstract |
The present invention relates to a separator for an electrochemical device and a separator comprising the same, and more particularly, the separator of the present invention comprises a porous substrate; A first porous coating layer formed on one surface of the porous substrate and made of a mixture of inorganic particles and a first binder polymer; And a second porous coating layer formed on the other surface of the porous substrate and dried after applying a mixture of a solvent, a non-solvent, and a second binder polymer. The separator of the present invention has an organic-inorganic porous coating layer formed on one surface thereof, and thus has excellent thermal stability. On the other side, the porous polymer layer is formed by mixing a binder polymer with a non-solvent and forming a dry binder thin film. At the same time, the thickness of the separator can be reduced, thereby reducing the resistance and increasing the capacity of the electrochemical device. |