| abstract |
A porous substrate having a plurality of pores; And a pair of porous coating layers formed on at least one surface of the porous substrate and including a plurality of inorganic particles and a binder positioned on at least a part of the surface of the inorganic particles to connect and fix the inorganic particles, , The weight of the binder relative to the total weight of the porous coating layer is 5 to 40 wt%, the inorganic particles include boehmite particles, the binder includes a fluorine-based binder and a rubber-based binder, and the fluorine-based binder and the rubber- Is in the range of 80:20 to 99.9: 0.1, and an electrochemical device comprising the separator. |