| abstract |
The invention discloses a preparation method of a functionally graded coating lithium battery separator, comprising the following steps: Step 1, uniformly coating a first slurry on one side of a polyethylene base film, standing at room temperature, and placing the first slurry on the polyethylene film. A first coating is obtained on the base film; step 2, the second slurry is coated on the first coating, dried, and a second coating is obtained on the first coating to obtain a functionally graded coating lithium battery separator . The functional gradient coating lithium battery separator of the present invention ensures the strong peeling strength and service performance of the lithium battery coating separator; enhances the adhesion with the pole piece, reduces the interface impedance with the active material, and optimizes the battery performance. Electrochemical performance; while ensuring product quality, the baking rate is improved and the production capacity is increased. |