Separator production method and non-aqueous electrolyte secondary battery
US-2015155541-A1 · Jun 4, 2015 · US
Method of producing nonaqueous electrolyte secondary battery separator
US2018062138A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018062138-A1 |
| Application number | US-201715677193-A |
| Country | US |
| Kind code | A1 |
| Filing date | Aug 15, 2017 |
| Priority date | Aug 31, 2016 |
| Publication date | Mar 1, 2018 |
| Grant date | — |
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Abstract
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A method of producing a nonaqueous electrolyte secondary battery separator capable of realizing a nonaqueous electrolyte secondary battery having a higher rate-characteristic-maintenance property is provided. A porous film containing polyolefin as a main component is immersed in a polar solvent at no greater than 100° C.
First claim
Opening claim text (preview).
1 . A method of producing a nonaqueous electrolyte secondary battery separator, comprising the step of immersing a porous film containing polyolefin as a main component in a non-protonic polar solvent at no greater than 100° C., so as to modify the porous film. 2 . The method as set forth in claim 1 , wherein the non-protonic polar solvent is at a temperature of 30° C. to 100° C. 3 . The method as set forth in claim 1 , wherein the porous film is immersed while the polar solvent in contact with a surface of the porous film is renewed. 4 . The method as set forth in claim 1 , further comprising the step of removing, from the porous film having been immersed in the non-protonic polar solvent at no greater than 100° C., the polar solvent, in the step of removing the polar solvent, the porous film having been immersed in the polar solvent being immersed in a solvent different from the polar solvent. 5 . The method as set forth in claim 1 , further comprising the step of removing, from the porous film having been immersed in the non-protonic polar solvent at no greater than 100° C., the polar solvent, in the step of removing the polar solvent, a gas in contact with a surface of the porous film having been immersed in the polar solvent being renewed. 6 . The method as set forth in claim 5 , wherein the gas is a nitrogen gas.
Assignees
Inventors
Classifications
- C08J5/18Primary
Manufacture of films or sheets · CPC title
with solvents, e.g. swelling agents · CPC title
After-treatment · CPC title
Li-accumulators · CPC title
Polyolefins · CPC title
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- What does patent US2018062138A1 cover?
- A method of producing a nonaqueous electrolyte secondary battery separator capable of realizing a nonaqueous electrolyte secondary battery having a higher rate-characteristic-maintenance property is provided. A porous film containing polyolefin as a main component is immersed in a polar solvent at no greater than 100° C.
- Who is the assignee on this patent?
- Sumitomo Chemical Co
- What technology area does this patent fall under?
- Primary CPC classification C08J5/18. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Mar 01 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).