Nonaqueous electrolyte secondary battery laminated separator
US-2020335750-A1 · Oct 22, 2020 · US
Nonaqueous electrolyte secondary battery porous layer
US2020335752A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2020335752-A1 |
| Application number | US-202016849042-A |
| Country | US |
| Kind code | A1 |
| Filing date | Apr 15, 2020 |
| Priority date | Apr 16, 2019 |
| Publication date | Oct 22, 2020 |
| Grant date | — |
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Abstract
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The present invention provides a nonaqueous electrolyte secondary battery porous layer which improves a long-term battery characteristic of a nonaqueous electrolyte secondary battery. In the nonaqueous electrolyte secondary battery porous layer in accordance with an aspect of the present invention, a standard deviation of whiteness index defined in E313 of the American Standards Test Methods is 0.06 or more and 0.91 or less.
First claim
Opening claim text (preview).
1 . A nonaqueous electrolyte secondary battery porous layer, wherein a standard deviation of whiteness index is 0.06 or more and 0.91 or less, the whiteness index being defined in E313 of the American Standards Test Methods. 2 . The nonaqueous electrolyte secondary battery porous layer as set forth in claim 1 , comprising one or more resins selected from the group consisting of polyolefin, a (meth)acrylate resin, a fluorine-containing resin, a polyamide resin, a polyester resin, and a water-soluble polymer. 3 . The nonaqueous electrolyte secondary battery porous layer as set forth in claim 1 , comprising a polyamide resin. 4 . The nonaqueous electrolyte secondary battery porous layer as set forth in claim 3 , wherein the polyamide resin is an aramid resin. 5 . The nonaqueous electrolyte secondary battery porous layer as set forth in claim 4 , wherein the aramid resin is one or more aramid resins selected from the group consisting of poly(paraphenylene terephthalamide), poly(metaphenylene terephthalamide), and a paraphenylene terephthalamide/metaphenylene terephthalamide copolymer. 6 . The nonaqueous electrolyte secondary battery porous layer as set forth in claim 1 , comprising a heat-resistant filler. 7 . The nonaqueous electrolyte secondary battery porous layer as set forth in claim 6 , wherein the heat-resistant filler contains an inorganic filler. 8 . The nonaqueous electrolyte secondary battery porous layer as set forth in claim 7 , wherein the inorganic filler contains one or more inorganic substances selected from the group consisting of alumina, boehmite, aluminum hydroxide, magnesium hydroxide, magnesium oxide, titanium oxide, and silica. 9 . A nonaqueous electrolyte secondary battery laminated separator, wherein a nonaqueous electrolyte secondary battery porous layer recited in claim 1 is stacked on one surface or both surfaces of a polyolefin porous film. 10 . A nonaqueous electrolyte secondary battery comprising: a nonaqueous electrolyte secondary battery porous layer recited in claim 1 . 11 . A nonaqueous electrolyte secondary battery comprising: a nonaqueous electrolyte secondary battery laminated separator recited in claim 9 .
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Classifications
comprising three or more layers · CPC title
comprising layers of only organic material and layers containing inorganic material · CPC title
Polyamide resins · CPC title
Polyolefins · CPC title
- H01M50/489Primary
Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties · CPC title
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Frequently asked questions
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- What does patent US2020335752A1 cover?
- The present invention provides a nonaqueous electrolyte secondary battery porous layer which improves a long-term battery characteristic of a nonaqueous electrolyte secondary battery. In the nonaqueous electrolyte secondary battery porous layer in accordance with an aspect of the present invention, a standard deviation of whiteness index defined in E313 of the American Standards Test Methods is…
- Who is the assignee on this patent?
- Sumitomo Chemical Co
- What technology area does this patent fall under?
- Primary CPC classification H01M50/489. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Oct 22 2020 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).