Separator for secondary battery, manufacturing method thereof, and lithium secondary battery
AssigneeSK On Co., Ltd.
InventorsChang Mook Hwang, Hyun Ji Kim, Jong Hyeok Lee, Yoon Ji Jo
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Abstract
Provided are a separator for a secondary battery, a manufacturing method thereof, and a lithium secondary battery including the same, having appropriate porosity and an appropriate pore size to lead to excellent strength and safety, and having excellent ion conductivity and resistance characteristics due to interconnected pore passages. The manufacturing method of a separator for a secondary battery includes: molding a separator manufacturing composition into a separator manufacturing sheet; and extracting a diluent from the separator manufacturing sheet with a polar aprotic organic solvent.
Claims6
A method for manufacturing a separator for a secondary battery, comprising:
- molding a separator composition to form a separator composition sheet;
- applying an ultrasonic treatment to the separator composition sheet;
- and
- forming a separator by extracting a diluent from the separator composition sheet using a polar aprotic organic solvent,
- wherein a frequency during the ultrasonic treatment is 1 to 100 kHz, and an output power during the ultrasonic treatment is 50 W to 200 W.
Dependencies are inferred from the claim text.