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US 2024/0191031 A1Published application
Method for preparing polybenzimidazole-based separator, polybenzimidazole-based separator prepared thereby, and secondary battery including the same
AssigneeStandard Energy Inc.
InventorsDongyoung LEE, Dongheun KIM
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Abstract
Disclosed is a method for preparing a polybenzimidazole solution, the method including: preparing a polybenzimidazole (PBI) precursor having an average particle size of 300 μm or smaller; and dissolving the PBI precursor in an amide-based organic solvent under a temperature condition of 140° C. or higher and/or a pressure condition of 0.1 MPa or higher.
Claims11
A method for preparing a polybenzimidazole solution, the method comprising:
- preparing at least one type of a polybenzimidazole (PBI) precursor having an average particle size of 300 μm or smaller;
- and
- dissolving the PBI precursor in an amide-based organic solvent under a temperature condition of 140° C. or higher and/or a pressure condition of 0.1 MPa or higher.
A method for manufacturing a polybenzimidazole-based separator, the method comprising:
- dissolving a polybenzimidazole (PBI) precursor in an amide-based organic solvent to produce a polybenzimidazole-containing solution;
- coating the polybenzimidazole-containing solution on a base substrate to form a liquid film thereon;
- removing the organic solvent from the liquid film in a drying manner to convert the liquid film to a solid film;
- and
- removing the solid film from the base substrate to obtain a polybenzimidazole-based separator as the solid film,
- wherein the average particle size of the PBI precursor is equal to or smaller than 300 μm,
- wherein dissolving the PBI precursor in the amide-based organic solvent is carried out under a temperature condition of 140° C. or higher and/or a pressure condition of 0.1 MPa or higher.
4 more elements
Dependencies are inferred from the claim text.