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Polyelectrolyte and process for producing the polyelectrolyte
US8993682B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8993682-B2 |
| Application number | US-93332509-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 12, 2009 |
| Priority date | Mar 19, 2008 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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The present invention provides an electrolyte having high conductivity even under high-temperature low-humidification conditions (e.g. at a temperature of 100 to 120° C. and a humidity of 20 to 50% RH) and thereby makes it possible to realize a higher performance fuel cell. The present invention is a fluoropolymer electrolyte having an equivalent weight (EW) of not less than 250 but not more than 700 and a proton conductivity of not lower than 0.10 S/cm as measured at a temperature of 110° C. and a relative humidity of 50% RH and comprising a COOZ group- or SO 3 Z group-containing monomer unit, wherein Z represents an alkali metal, an alkaline earth metal, hydrogen atom or NR 1 R 2 R 3 R 4 in which R 1 , R 2 , R 3 and R 4 each independently represents an alkyl group containing 1 to 3 carbon atoms or hydrogen atom.
First claim
Opening claim text (preview).
The invention claimed is: 1. A fluoropolymer electrolyte having an equivalent weight (EW) of not less than 250 but not more than 700 and a proton conductivity of not lower than 0.10 S/cm as measured at a temperature of 110° C. and a relative humidity of 50% RH and which comprises a repeating unit (α) derived from a COOZ group- or SO 3 Z group-containing monomer represented by the general formula (I): CF 2 ═CF(CF 2 ) k —O l —(CF 2 CFY 1 —O) n —(CFY 2 ) m -A 1 (I) wherein…
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Electricity · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Electricity · mapped topic
- H01M8/1039Primary
Electricity · mapped topic
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- What does patent US8993682B2 cover?
- The present invention provides an electrolyte having high conductivity even under high-temperature low-humidification conditions (e.g. at a temperature of 100 to 120° C. and a humidity of 20 to 50% RH) and thereby makes it possible to realize a higher performance fuel cell. The present invention is a fluoropolymer electrolyte having an equivalent weight (EW) of not less than 250 but not more th…
- Who is the assignee on this patent?
- Kita Kohei, Murai Takahiko, Sakamoto Naoki, and 8 more
- 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 Mar 31 2015 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).