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Separator production method and non-aqueous electrolyte secondary battery
US2015155541A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2015155541-A1 |
| Application number | US-201314406784-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jun 17, 2013 |
| Priority date | Jun 20, 2012 |
| Publication date | Jun 4, 2015 |
| Grant date | — |
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- Title
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Abstract
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A production method according to the present invention is a method comprising impregnating a laminated porous film, which is formed by laminating a heat-resistant layer containing polyvinyl alcohol (PVA) and an inorganic filler on one side or both sides of a substrate material porous film predominantly composed of polyolefin, with a solution containing a compound having the ability of cross-linking PVA, and then removing a solvent. The present invention can produce a separator having excellent heat shape retainability even when PVA is used for a binder resin for forming a heat-resistant layer.
First claim
Opening claim text (preview).
1 . A method for producing a separator, the method comprising impregnating a laminated porous film, which is formed by laminating a heat-resistant layer containing polyvinyl alcohol (PVA) and an inorganic filler on one side or both sides of a substrate material porous film predominantly composed of polyolefin, with a solution containing a compound having the ability of cross-linking PVA, and then removing a solvent. 2 . The method for producing a separator according to claim 1 , wherein the compound having the ability of cross-linking PVA is boric acid and/or an organometallic compound having the ability of cross-linking PVA. 3 . The method for producing a separator according to claim 2 , wherein the organometallic compound having the ability of cross-linking PVA is an organic titanium compound. 4 . The method for producing a separator according to claim 3 , wherein the organic titanium compound is titanium lactate. 5 . The method for producing a separator according to claim 1 , wherein the solvent in the solution containing a compound having the ability of cross-linking PVA is a solvent predominantly composed of water. 6 . The method for producing a separator according to claim 1 , wherein the inorganic filler is alumina. 7 . The method for producing a separator according to claim 1 , wherein a proportion of polyvinyl alcohol in the heat-resistant layer is 1 part by weight or more and 5 parts by weight or less with respect to 100 parts by weight of the inorganic filler. 8 . A non-aqueous electrolyte secondary battery including the separator obtained by the method according to claim 1 .
Assignees
Inventors
Classifications
- B32B5/18Primary
characterised by features of a layer {of} foamed material · CPC title
comprising three or more layers · CPC title
comprising layers of only organic material and layers containing inorganic material · CPC title
Polyolefins · CPC title
Porosity · CPC title
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- What does patent US2015155541A1 cover?
- A production method according to the present invention is a method comprising impregnating a laminated porous film, which is formed by laminating a heat-resistant layer containing polyvinyl alcohol (PVA) and an inorganic filler on one side or both sides of a substrate material porous film predominantly composed of polyolefin, with a solution containing a compound having the ability of cross-lin…
- Who is the assignee on this patent?
- Sumitomo Chemical Co
- What technology area does this patent fall under?
- Primary CPC classification B32B5/18. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Jun 04 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).