| 摘要 |
The separator of the present invention comprises a porous composite having a porous substrate and a first porous coating layer formed on at least one surface of the porous substrate and comprising a mixture of inorganic particles and a first binder polymer; and a second porous coating layer formed on a first surface of the porous composite and comprising a mixture of cathode active material particles, a second binder polymer and a first conductive material, a third porous coating layer formed on a second surface of the porous composite and comprising a mixture of anode active material particles, a third binder polymer and a second conductive material, or both of the second porous coating layer and the third porous coating layer. Also, the separator of present invention may further comprise a fourth porous coating layer formed on at least one outermost surface thereof and comprising a fourth binder polymer. In particular, in the case that an electrode-separator adhesive layer is formed, the active material functions as a passage for transferring lithium ions, thereby preventing the transferring rate of lithium ions from being reduced. The separator of the present invention having porous coating layers comprising a conductive material can provide very superior output characteristic in electrochemical devices due to the use of the conductive material and can prevent the penetration of the conductive material into a porous substrate, thereby prohibiting a short circuit due to the use of the conductive material. |
