Laminated separator for non-aqueous electrolyte secondary battery and manufacturing method thereof

JP7664744B2Active Publication Date: 2025-04-18エスエスエルエム株式会社
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Patent Information

Application Number
JP2021069298
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-04-27
Filing Date
2021-04-15
Publication Date
2025-04-18
Estimated Expiration
2041-04-15

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Abstract

To provide a method for manufacturing a laminate separator for a nonaqueous electrolyte secondary battery, by which the thinner profile, heat resistance and ion permeability can be achieved.SOLUTION: A method for manufacturing a laminate separator for a nonaqueous electrolyte secondary battery according to an embodiment of the present invention comprises the step of forming a heat-resistant layer containing a resin and a filler on a polyolefin porous film. In the method, the resin has an intrinsic viscosity of 1.5-1.9 dL / g; the filler has an average particle diameter of 500 nm or less; and the laminate separator for a nonaqueous electrolyte secondary battery has a film thickness of 15 μm or less.SELECTED DRAWING: None
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Citation Information

Patent Citations

  • Para-aramid-based porous film and separator for battery or cell and lithium secondary battery using the same

    JP1998324758A

  • Non-aqueous electrolyte battery separator and lithium secondary battery

    JP2000030686A

  • Fully aromatic polyamide, fully aromatic polyamide porous film and separator for nonaqueous electrolytic solution secondary battery

    JP2003040999A

  • Multilayer microporous membrane and separator for electricity storage device

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  • Porous film and laminated porous film

    JP2017212201A