| abstract |
a porous substrate having a plurality of pores; and a porous coating layer positioned on at least one surface of the porous substrate and comprising a plurality of inorganic particles, and a binder polymer positioned on some or all of the surfaces of the inorganic particles to connect and fix the inorganic particles, The binder polymer includes a first binder polymer and a second binder polymer, the first binder polymer has an electrolyte uptake of 80 to 165%, and the second binder polymer is impregnated with an electrolyte of 20 to 40%. A separator for an electrochemical device having a ratio, and an electrochemical device including the same are provided. |