US10570235B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10570235-B2 |
| Application number | US-201716094616-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 20, 2017 |
| Priority date | May 10, 2016 |
| Publication date | Feb 25, 2020 |
| Grant date | Feb 25, 2020 |
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A composition for a non-aqueous secondary battery functional layer comprises: non-conductive particles; a water-soluble polymer containing a (meth)acrylamide monomer unit in a proportion of 70.0 mass % or more and 99.0 mass % or less; and a water-insoluble polymer containing an ethylenically unsaturated carboxylic acid monomer unit in a proportion of 1.5 mass % or more and 5.0 mass % or less and having a degree of swelling in electrolyte solution of more than 1.0 time and 3.0 times or less.
Opening claim text (preview).
The invention claimed is: 1. A composition for a non-aqueous secondary battery functional layer, comprising: non-conductive particles; a water-soluble polymer containing a (meth)acrylamide monomer unit in a proportion of 70.0 mass % or more and 99.0 mass % or less; and a water-insoluble polymer containing an ethylenically unsaturated carboxylic acid monomer unit in a proportion of 1.5 mass % or more and 5.0 mass % or less and having a degree of swelling in electrolyte solution of more than 1.0 time and 3.0 times or less. 2. The composition for a non-aqueous secondary battery functional layer according to claim 1 , wherein the water-soluble polymer contains a cross-linkable monomer unit in a proportion of 0.01 mass % or more and 4.0 mass % or less. 3. The composition for a non-aqueous secondary battery functional layer according to claim 1 , wherein the water-insoluble polymer contains a cross-linkable monomer unit in a proportion of 0.01 mass % or more and 4.0 mass % or less. 4. The composition for a non-aqueous secondary battery functional layer according to claim 1 , wherein the water-soluble polymer has a degree of swelling in electrolyte solution of more than 1.0 time and 2.0 times or less. 5. The composition for a non-aqueous secondary battery functional layer according to claim 1 , wherein the water-insoluble polymer contains an aromatic monovinyl monomer unit in a proportion of 10 mass % or more and 60 mass % or less. 6. The composition for a non-aqueous secondary battery functional layer according to claim 1 , wherein a content by mass of the water-insoluble polymer is 0.1 times or more and 2.5 times or less the water-soluble polymer. 7. A functional layer for a non-aqueous secondary battery formed using the composition for a non-aqueous secondary battery functional layer according to claim 1 . 8. A non-aqueous secondary battery comprising the functional layer for a non-aqueous secondary battery according to claim 7 .
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