Aromatic sulfonic acid derivative, sulfonic acid group-containing polymer, block copolymer, polymer electrolyte material, polymer electrolyte form article, and polymer electrolyte fuel cell
US-2015380759-A1 · Dec 31, 2015 · US
Enhancement of Conductivity in Nanostructured Proton Exchange Membranes
US2018191013A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018191013-A1 |
| Application number | US-201715789062-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 20, 2017 |
| Priority date | Oct 20, 2016 |
| Publication date | Jul 5, 2018 |
| Grant date | — |
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- Title
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Abstract
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An ion exchange membrane is provided with a nanostructure material of random poly(ethylene glycol)-polyimide copolymers doped and annealed in an ionic liquid, the poly(ethylene glycol) having a molecular weight ranging from 1000 to 4000 and the poly(ethylene glycol) representing at least 40% of the volume of the ion exchange membrane. It is shown that the conductivity of these membranes was dramatically increased by the thermal annealing by 2-5 times. It was also shown that nanoscale structures were developed upon heating the membranes involving the increment of order, definition, and size of the poly(ethylene glycol)-ethylammonium nitrate [PEG+EAN] domains by the SAXS data analysis. This structural change improves the ion conduction in the membrane and result in the considerable enhancement of the conductivity.
First claim
Opening claim text (preview).
What is claimed is: 1 . An ion exchange membrane, comprising a nanostructure material of random poly(ethylene glycol)-polyimide copolymers doped and annealed in an ionic liquid, the poly(ethylene glycol) having a molecular weight ranging from 1000 to 4000 and the poly(ethylene glycol) representing at least 40% of the volume of the ion exchange membrane. 2 . The ion exchange membrane as set forth in claim 1 , wherein the poly(ethylene glycol) has a molecular weight of 1000 to 2500. 3 . The ion exchange membrane as set forth in claim 1 , wherein the poly(ethylene glycol) has a molecular weight of about 1500.
Assignees
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Classifications
Wholly aromatic polyimides containing oxygen in the form of ether bonds in the main chain · CPC title
based on macromolecular compounds obtained by reactions involving unsaturated carbon-to-carbon bonds, and by reactions not involving this type of bond · CPC title
obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds · CPC title
Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors · CPC title
Fuel cells with polymeric electrolytes · CPC title
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- What does patent US2018191013A1 cover?
- An ion exchange membrane is provided with a nanostructure material of random poly(ethylene glycol)-polyimide copolymers doped and annealed in an ionic liquid, the poly(ethylene glycol) having a molecular weight ranging from 1000 to 4000 and the poly(ethylene glycol) representing at least 40% of the volume of the ion exchange membrane. It is shown that the conductivity of these membranes was dra…
- Who is the assignee on this patent?
- Univ Leland Stanford Junior
- What technology area does this patent fall under?
- Primary CPC classification H01M8/1027. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Jul 05 2018 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).