Composite ion-exchange membranes for flow batteries
US-2024387848-A1 · Nov 21, 2024 · US
Ion exchange membranes having low in-plane swelling
US9941538B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9941538-B2 |
| Application number | US-201615371652-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 7, 2016 |
| Priority date | Feb 22, 2013 |
| Publication date | Apr 10, 2018 |
| Grant date | Apr 10, 2018 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
Disclosed is an ion exchange membrane comprising a film of a perfluorosulfonic acid ionomer in its acid form; the film having a low in-plane swelling, such that the length and/or width of the film changes by less than 10% when the membrane is exposed to water. Further disclosed is an electrochemical device, such as a polymer electrolyte membrane fuel cell, comprising an electrolyte comprising the ion exchange membrane.
First claim
Opening claim text (preview).
The invention claimed is: 1. An ion exchange membrane comprising a film of a perfluorosulfonic acid ionomer in its acid form, the film having a length, width and thickness, the thickness being from 3 to 200 microns; wherein the length and/or width of the film changes by less than 10% when the membrane is exposed to water. 2. The membrane according to claim 1 , wherein the thickness is from 3 to 95 microns. 3. The membrane according to claim 1 , wherein the length and/or width of the film changes by less than 7.5% when the membrane is exposed to water. 4. The membrane according to claim 1 , wherein the film consists of the perfluorosulfonic acid ionomer. 5. An electrochemical device comprising an electrolyte comprising the membrane as defined in claim 1 . 6. The device according to claim 5 which is a polymer electrolyte membrane fuel cell. 7. A membrane according to claim 1 , wherein the perfluorosulfonic acid ionomer is a perfluorosulfonic acid-polytetrafluoroethylene copolymer of Formula (II): wherein the number of repeat units x and y are such that there are less than 15 x units for each y and the value of m and n are integers between 0 and 5.
Assignees
Inventors
Classifications
Fuel cells with polymeric electrolytes · CPC title
having sulfur, e.g. sulfonated-polyethersulfones [S-PES] · CPC title
having only carbon and oxygen, e.g. polyethers, sulfonated polyetheretherketones [S-PEEK], sulfonated polysaccharides, sulfonated celluloses or sulfonated polyesters · CPC title
containing fluorine · CPC title
containing fluorine atoms · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9941538B2 cover?
- Disclosed is an ion exchange membrane comprising a film of a perfluorosulfonic acid ionomer in its acid form; the film having a low in-plane swelling, such that the length and/or width of the film changes by less than 10% when the membrane is exposed to water. Further disclosed is an electrochemical device, such as a polymer electrolyte membrane fuel cell, comprising an electrolyte comprising t…
- Who is the assignee on this patent?
- Nat Res Council Canada
- What technology area does this patent fall under?
- Primary CPC classification H01M8/1039. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Apr 10 2018 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).