Use of a ceramic separator in lithium ion batteries, comprising an electrolyte containing ionic fluids
US-9214659-B2 · Dec 15, 2015 · US
Binder composition for secondary battery porous membrane, slurry for secondary battery porous membrane, porous membrane for secondary battery, and secondary battery
US2016359156A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016359156-A1 |
| Application number | US-201515116634-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 3, 2015 |
| Priority date | Feb 27, 2014 |
| Publication date | Dec 8, 2016 |
| Grant date | — |
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Abstract
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A binder composition for a porous membrane of a secondary battery, including a polycarboxylic acid and water, wherein the polycarboxylic acid includes a carboxylic acid group-containing monomer unit in an amount of 20% by weight or more and 50% by weight or less, the polycarboxylic acid is water-insoluble at a pH of 6.5 or less and water-soluble at a pH of 8 or more, and the binder composition for a porous membrane of a secondary battery has a pH of 6.5 or less; and a slurry for a porous membrane of a secondary battery using the binder composition, a porous membrane for a secondary battery, and a secondary battery.
First claim
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1 . A binder composition for a porous membrane of a secondary battery, comprising a polycarboxylic acid and water, wherein the polycarboxylic acid includes a carboxylic acid group-containing monomer unit in an amount of 20% by weight or more and 50% by weight or less, the polycarboxylic acid is water-insoluble at a pH of 6.5 or less and water-soluble at a pH of 8 or more, and the binder composition for a porous membrane of a secondary battery has a pH of 6.5 or less. 2 . The binder composition for a porous membrane of a secondary battery according to claim 1 , wherein the polycarboxylic acid includes an alkyl (meth)acrylate unit in an amount of 50% by weight or more. 3 . The binder composition for a porous membrane of a secondary battery according to claim 2 , wherein the alkyl (meth)acrylate unit includes an alkyl (meth)acrylate unit (U1) having an alkyl group having 1 to 3 carbon atoms and an alkyl (meth)acrylate unit (U2) having an alkyl group having 4 to 6 carbon atoms, and the unit (U1) and the unit (U2) in the polycarboxylic acid have a weight ratio U1/U2 of 1.0 to 10.0. 4 . The binder composition for a porous membrane of a secondary battery according to claim 1 , wherein the polycarboxylic acid has a glass transition temperature of lower than 30° C. 5 . A slurry for a porous membrane of a secondary battery, comprising a non-conductive particle, a polycarboxylic acid, and water, wherein the polycarboxylic acid includes a carboxylic acid group-containing monomer unit in an amount of 20% by weight or more and 50% by weight or less, the polycarboxylic acid is water-insoluble at a pH of 6.5 or less and water-soluble at a pH of 8 or more, and the slurry for a porous membrane of a secondary battery has a pH of more than 7.0. 6 . A porous membrane for a secondary battery, obtained by forming a layer of the slurry for a porous membrane of a secondary battery according to claim 5 and drying the formed layer. 7 . A secondary battery comprising the porous membrane for a secondary battery according to claim 6 . 8 . The binder composition for a porous membrane of a secondary battery according to claim 2 , wherein the polycarboxylic acid has a glass transition temperature of lower than 30° C. 9 . The binder composition for a porous membrane of a secondary battery according to claim 3 , wherein the polycarboxylic acid has a glass transition temperature of lower than 30° C.
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of aluminium · CPC title
Copolymers with monomers not covered by C08L33/06 · CPC title
Li-accumulators · CPC title
of metals · CPC title
being polymers · CPC title
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- What does patent US2016359156A1 cover?
- A binder composition for a porous membrane of a secondary battery, including a polycarboxylic acid and water, wherein the polycarboxylic acid includes a carboxylic acid group-containing monomer unit in an amount of 20% by weight or more and 50% by weight or less, the polycarboxylic acid is water-insoluble at a pH of 6.5 or less and water-soluble at a pH of 8 or more, and the binder composition …
- Who is the assignee on this patent?
- Zeon Corp
- What technology area does this patent fall under?
- Primary CPC classification H01M2/162. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Dec 08 2016 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).