Separator for nonaqueous electrolyte battery, and nonaqueous electrolyte battery
US-2015207122-A1 · Jul 23, 2015 · US
Laminated body, separator, and nonaqueous secondary battery
US9711775B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9711775-B2 |
| Application number | US-201615292531-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 13, 2016 |
| Priority date | Aug 29, 2014 |
| Publication date | Jul 18, 2017 |
| Grant date | Jul 18, 2017 |
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- Title
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Abstract
Official abstract text for this publication.
A laminated body of the present invention includes: a porous film containing a polyolefin as a main component; and a porous layer on at least one surface of the porous film, the porous layer containing a resin, the laminated body satisfying 0≦(A)−(B)≦20 mN/m, where (A) represents the critical surface tension over the outermost surface of the porous layer, and (B) represents the critical surface tension that, in a case where the porous layer has been peeled from the laminated body at an interface with the porous film, the porous film has on the side of the interface.
First claim
Opening claim text (preview).
The invention claimed is: 1. A laminated body, comprising: a porous film containing a polyolefin as a main component; and a porous layer laminated on at least one surface of the porous film, the porous layer containing a resin, the resin being a polyvinylidene fluoride-hexafluoropropylene copolymer, the porous film having a thickness within a range of not less than 4 μm and not more than 17 μm, the porous film having a weight per unit area within a range of not less than 5 g/m 2 and not more than 12 g/m 2 , the porous layer having a weight per unit area within a range of not less than 0.1 g/m 2 and not more than 5 g/m 2 , the laminated body satisfying Formula (1) below, 0 mN/m≦( A )−( B )≦20 mN/m (1), where (A) represents a critical surface tension over an outermost surface of the porous layer, and (B) represents a critical surface tension that, in a case where the porous layer has been peeled from the laminated body at an interface with the porous film, the porous film has on a side of the interface, the laminated body satisfying Formula (2) below, ( C )/( D )≦0.13 (2), where (C) represents an average pore diameter of the porous film, and (D) represents a porosity of the porous film, the average pore diameter (C) having a value in μm indicative of a mean value of respective sizes of pores in the porous film, the porosity (D) having a value indicative of a volume proportion of void in the actual porous film with reference to a volume of the porous film assumed to have no void. 2. A separator for a nonaqueous electrolyte secondary battery, the separator comprising a laminated body according to claim 1 . 3. A nonaqueous electrolyte secondary battery, comprising a separator according to claim 2 .
Assignees
Inventors
Classifications
- H01M4/505Primary
of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title
Polyolefins · CPC title
- H01M50/426Primary
Fluorocarbon polymers · CPC title
Porosity · CPC title
having a layered structure · CPC title
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Frequently asked questions
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- What does patent US9711775B2 cover?
- A laminated body of the present invention includes: a porous film containing a polyolefin as a main component; and a porous layer on at least one surface of the porous film, the porous layer containing a resin, the laminated body satisfying 0≦(A)−(B)≦20 mN/m, where (A) represents the critical surface tension over the outermost surface of the porous layer, and (B) represents the critical surface…
- Who is the assignee on this patent?
- Sumitomo Chemical Co
- What technology area does this patent fall under?
- Primary CPC classification H01M4/505. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jul 18 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).