| 摘要 |
The present invention provides a method of preparing a separator for a lithium secondary battery, comprising: forming a porous coating layer on at least one surface of a porous substrate, the porous coating layer comprising inorganic particles; bringing polymer particles into electric charging to obtain electrically charged polymer particles; transferring the electrically charged polymer particles on the top surface the porous coating layer to form a functional coating layer; and fixing the functional coating layer with heat and pressure, a separator prepared by the method, and a lithium secondary battery comprising the separator. In accordance with the present invention, in the preparation of a separator for a lithium secondary battery, a functional coating layer is applied by using electrostatic charging, more specifically coating polymer particles by way of laser printing, without the addition of a solvent, thereby allowing easy handling and storage and needs no drying step of the solvent after coating to provide cost savings effect and efficient productivity due to a quick coating procedure. |
