| 摘要 |
The present invention relates to a secondary battery separation membrane including double porous coating layers of inorganic particles having different surface properties, a secondary battery including the same, and a method for manufacturing the separation membrane. According to one embodiment of the present invention, provided is the secondary battery separation membrane comprising: a porous substrate; a first porous coating layer; and a second porous coating layer. According to another embodiment of the present invention, provided is the method for manufacturing the secondary battery separation membrane, comprising the steps of: forming a first slurry; forming a second slurry; forming the first porous coating layer; and forming the second porous coating layer. The separation membrane, according to one aspect of the present invention, in which the inorganic particles are uniformly dispersed within the coating layers thereof, can maintain battery stability by adsorbing excessive metal ions in the battery which are generated if the temperature of the battery exceeds a normal operation temperature range. |
