Separator for nonaqueous cell and nonaqueous cell
US-2015079479-A1 · Mar 19, 2015 · US
Separator for electrochemical element, process for producing separator and electrochemical element using separator
US9653717B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9653717-B2 |
| Application number | US-201414468642-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 26, 2014 |
| Priority date | Aug 30, 2013 |
| Publication date | May 16, 2017 |
| Grant date | May 16, 2017 |
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Abstract
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A separator for electrochemical element, comprising a porous sheet that contains as a main fiber, a fibrillated solvent spun cellulose fiber with an average fiber length of 0.40 to 1.10 mm, has an average internal bond strength of 60 mJ or more in a thickness direction, and has a lowest internal bond strength of 30 mJ or more in the thickness direction, a process for producing the separator, and an electrochemical element using the separator. The separator for electrochemical element has strong mechanical strength and excellent processability.
First claim
Opening claim text (preview).
What is claimed is: 1. A separator for electrochemical element, comprising a porous sheet that contains as a main fiber, a fibrillated solvent spun cellulose fiber with an average fiber length of 0.40 to 1.10 mm, has an average internal bond strength of 60 mJ or more in a thickness direction, and has a lowest internal bond strength of 30 mJ or more in the thickness direction. 2. A process for producing a separator for electrochemical element, comprising a porous sheet that contains as a main fiber, a fibrillated solvent spun cellulose fiber with an average fiber length of 0.40 to 1.10 mm, has an average internal bond strength of 60 mJ or more in a thickness direction, and has a lowest internal bond strength of 30 mJ or more in the thickness direction, wherein the porous sheet is prepared by a paper-making method, in which a wet press treatment of two or more nips is performed at least on the porous sheet. 3. A process for producing a separator for electrochemical element, comprising a porous sheet that contains as a main fiber, a fibrillated solvent spun cellulose fiber with an average fiber length of 0.40 to 1.10 mm, has an average internal bond strength of 60 mJ or more in a thickness direction, and has a lowest internal bond strength of 30 mJ or more in the thickness direction, wherein the porous sheet is prepared by a paper-making method, in which both surfaces of the porous sheet are contacted with a heated cylinder roll at least once. 4. A separator for electrochemical element produced by the process for producing the separator for electrochemical element recited in claim 2 . 5. An electrochemical element comprising the separator for electrochemical element recited in claim 1 . 6. A separator for electrochemical element produced by the process for producing the separator for electrochemical element recited in claim 3 . 7. An electrochemical element comprising the separator for electrochemical element recited in claim 4 . 8. An electrochemical element comprising the separator for electrochemical element recited in claim 6 .
Assignees
Inventors
Classifications
Moulding; Embossing; Cutting · CPC title
- D21H11/18Primary
Highly hydrated, swollen or fibrillatable fibres · CPC title
- D21H13/02Primary
Synthetic cellulose fibres · CPC title
Electricity · mapped topic
- H01M2/1626Primary
Electricity · mapped topic
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- What does patent US9653717B2 cover?
- A separator for electrochemical element, comprising a porous sheet that contains as a main fiber, a fibrillated solvent spun cellulose fiber with an average fiber length of 0.40 to 1.10 mm, has an average internal bond strength of 60 mJ or more in a thickness direction, and has a lowest internal bond strength of 30 mJ or more in the thickness direction, a process for producing the separator, an…
- Who is the assignee on this patent?
- Mitsubishi Paper Mills Ltd
- What technology area does this patent fall under?
- Primary CPC classification D21H11/18. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue May 16 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).