SEPARATOR, AND ELECTROCHEMICAL DEVICE COMPRISING SAME

摘要

The present invention relates to a separator for an electrochemical device, and an electrochemical device comprising the same. More specifically, the separator of the present invention comprises: a porous substrate; a first porous coating layer comprising a mixture of inorganic particles and a first binder polymer, formed on one surface of the porous substrate; and a second porous coating layer formed on the other surface of the porous substrate by coating a mixture, a solvent, a non-solvent and a second binder polymer and drying the coated mixture. The separator of the present invention has excellent thermal stability since an organic-inorganic porous coating layer is formed on one surface thereof. In addition, adhesion is excellent, resistance can be reduced by the decrease in thickness of the separator, and the capacity of an electrochemical device can be improved since a porous coating layer comprising a binder thin film prepared by coating a mixture of a binder polymer and a non-solvent and drying the coated mixture is formed on the other surface of the separator.