Liquid Electrolyte Composition, and Electrochemical Cell Comprising Said Electrolyte Composition
US-2024347772-A1 · Oct 17, 2024 · US
Oxidation resistant separator for a battery
US9660290B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9660290-B2 |
| Application number | US-54927306-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 13, 2006 |
| Priority date | Feb 21, 2003 |
| Publication date | May 23, 2017 |
| Grant date | May 23, 2017 |
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- Title
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- Abstract
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- First independent claim
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Abstract
Official abstract text for this publication.
A lithium ion rechargeable battery comprises: a negative electrode adapted to give up electrons during discharge, a positive electrode adapted to gain electrons during discharge, a microporous separator sandwiched between said positive electrode and said negative electrode, an organic electrolyte being contained within said separator and being in electrochemical communication with said positive electrode and said negative electrode, and an oxidative barrier interposed between said separator and said positive electrode, and thereby preventing oxidation of said separator.
First claim
Opening claim text (preview).
That which is claimed: 1. A method for preventing oxidation on a polyolefin separator in a lithium ion secondary battery comprising the steps of: providing a lithium ion secondary battery having a positive electrode and a polyolefin separator film, the separator film consisting of a polyolefin film and an antioxidative barrier coating on the polyolefin film, where the coating is only on a side of the polyolefin film and facing the positive electrode; and positioning said antioxidative barrier coating between the positive electrode and said polyolefin film, the antioxidative barrier coating being made of a polymer having a resistance to oxidation greater than polyethylene, where said antioxidative barrier coating consists of polyvinylidene fluoride, where said polyolefin film is a polyethylene film, and wherein said antioxidative barrier coating has a weight of <0.15 mg/cm 2 . 2. The method of claim 1 where said polyolefin film is a single layered film. 3. The method of claim 1 where said polyolefin film is a multi-layered film. 4. The method of claim 1 where said antioxidative barrier coating is a discrete polymer coating formed onto said polyolefin film by a coating method selected from the group consisting of brushing, spaying, applying via roller, and applying by immersion.
Assignees
Inventors
Classifications
Organic material · CPC title
- H01M10/0525Primary
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
comprising three or more layers · CPC title
Polyolefins · CPC title
Fluorocarbon polymers · CPC title
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Frequently asked questions
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- What does patent US9660290B2 cover?
- A lithium ion rechargeable battery comprises: a negative electrode adapted to give up electrons during discharge, a positive electrode adapted to gain electrons during discharge, a microporous separator sandwiched between said positive electrode and said negative electrode, an organic electrolyte being contained within said separator and being in electrochemical communication with said positive…
- Who is the assignee on this patent?
- Zhang Zhengming, Arora Pankaj, Celgard Llc
- What technology area does this patent fall under?
- Primary CPC classification H01M10/0525. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue May 23 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).