Collector, electrode structure, nonaqueous electrolyte battery, conductive filler, and electrical storage device
US-2015280241-A1 · Oct 1, 2015 · US
Cathode for lithium ion secondary battery and lithium ionsecondary battery using the same
US2016240836A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016240836-A1 |
| Application number | US-201415025470-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 26, 2014 |
| Priority date | Sep 30, 2013 |
| Publication date | Aug 18, 2016 |
| Grant date | — |
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Abstract
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A cathode for a lithium ion secondary battery, including: a cathode current collector; a PTC layer including an electrically conductive particle, a polymer particle, and a water-soluble polymer, the PTC layer being provided on the cathode current collector; and a cathode active material layer provided on the PTC layer, as well as a lithium ion secondary battery using the same.
First claim
Opening claim text (preview).
1 . A cathode for a lithium ion secondary battery, comprising: a cathode current collector; a PTC layer provided on the cathode current collector, the PTC layer comprising electrically conductive particles, polymer particles, and a water-soluble polymer; and a cathode active material layer provided on the PTC layer. 2 . The cathode for a lithium ion secondary battery according to claim 1 , wherein the PTC layer has a thickness of from 1 μm to 10 μm. 3 . The cathode for a lithium ion secondary battery according to claim 1 , wherein a mass ratio of a total amount of the electrically conductive particles and the polymer particles which are comprised in the PTC layer to the water-soluble polymer comprised in the PTC layer (a total amount of the electrically conductive particles and the polymer particles : the water-soluble polymer) is from 99.9:0.1 to 95:5. 4 . The cathode for a lithium ion secondary battery according to claim 1 , wherein the polymer particles have an average particle diameter of from 0.1 μm to 5 μm. 5 . (canceled) 6 . The cathode for a lithium ion secondary battery according to claim 1 , wherein the electrically conductive particles comprise at least one selected from the group consisting of carbon particles and metal particles. 7 . The cathode for a lithium ion secondary battery according to claim 1 , wherein the polymer particles comprise polyolefin particles. 8 . The cathode for a lithium ion secondary battery according to claim 1 , wherein the polymer particles comprise at least one selected from the group consisting of a particle of an ionomer resin and a particle of a (meth)acrylate-containing copolymer. 9 . The cathode for a lithium ion secondary battery according to claim 1 , wherein the content ratio of the electrically conductive particles to the polymer particles in mass ratio is from 2:98 to 20:80. 10 . The cathode for a lithium ion secondary battery according to claim 1 , wherein the water-soluble polymer comprises at least one selected from the group consisting of a carboxymethyl cellulose derivative, polyvinyl pyrrolidone, and polyacrylic acid. 11 . A lithium ion secondary battery, comprising the cathode for a lithium ion secondary battery according to claim 1 .
Assignees
Inventors
Classifications
Batteries in portable systems, e.g. mobile phone, laptop · CPC title
- H01M4/667Primary
in the form of layers, e.g. coatings · CPC title
Positive electrodes · CPC title
- H01M4/13Primary
Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title
PTC · CPC title
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Frequently asked questions
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- What does patent US2016240836A1 cover?
- A cathode for a lithium ion secondary battery, including: a cathode current collector; a PTC layer including an electrically conductive particle, a polymer particle, and a water-soluble polymer, the PTC layer being provided on the cathode current collector; and a cathode active material layer provided on the PTC layer, as well as a lithium ion secondary battery using the same.
- Who is the assignee on this patent?
- Hitachi Chemical Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/667. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Aug 18 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).