Patent US5330860A successfully refreshed from Google Patents.
US5330860A
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Membrane and electrode structure
Assignee: EIDP Inc
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Filing: 1993-04-26
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Granted: 1994-07-19
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Expires: 2013-04-26
Abstract
Abstract The electrode layer of a ion exchange membrane is formed by printing a ink of catalytically active particles on the surface of the membrane. The inventive electrode ink comprises: (a) catalytically active particles; (b) a hydrocarbon having at least one ether, epoxy or ketone linkage and an alcohol group, preferably 1-methoxy 2-propanol; and (c) optionally a binder, preferably perfluorinated sulfonyl fluoride polymer or perfluorinated sulfonic acid polymer.
Inventors
- 👤 Walther G. Grot
- 👤 Shoibal Banerjee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:57
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/88; H01M4/8825; H01M4/8828; H01M4/8835; C; C25; C25B; C25B9/00; C25B9/17; C25B9/19; C25B9/23; H01M4/8803; H01M4/8814; H01M8/00; H01M8/10; H01M8/1004; H01M2300/00; H01M2300/0017; H01M2300/0065; H01M2300/0082; H01M4/8878; H01M4/8882; H01M8/1009; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
34 words
An electrode composition comprising: (a) catalytically active particles; (b) a hydrocarbon selected from the group of 1-methoxy-2propanol, 1-ethoxy-2-propanol; 1-methoxy-2-methyl-2-propanol; 1-isopropoxy-2-propanol; 1-propoxy-2-propanol; 2-phenoxy-1-propanol; 2-ethoxy-1-propanol; 2,3-ethoxy-1-propanol; 2-methoxy- 1-propanol; 1-butoxy-2-propanol; or mixtures thereof; and (c) a binder.
Claim 2
Dependent Claim
34 words
An electrode composition comprising: (a) catalytically active particles; (b) a hydrocarbon selected from the group of 1-methoxy-2propanol, 1-ethoxy-2-propanol; 1-methoxy-2-methyl-2-propanol; 1-isopropoxy-2-propanol; 1-propoxy-2-propanol; 2-phenoxy-1-propanol; 2-ethoxy-1-propanol; 2,3-ethoxy-1-propanol; 2-methoxy- 1-propanol; 1-butoxy-2-propanol; or mixtures thereof; and (c) a binder.
Claim 3
Dependent Claim
19 words
The composition of claim 1 in which the hydrocarbon is nonsolid at the processing temperatures of the electrode composition.
Claim 4
Dependent Claim
14 words
The composition of claim 1 wherein the binder is a perfluorinated sulfonyl fluoride polymer.
Claim 5
Dependent Claim
11 words
The composition of claim 3 in which the polymer is hydrolyzed.
Claim 6
Dependent Claim
11 words
The composition of claim 3 in which the polymer is unhydrolyzed.
Claim 7
Dependent Claim
20 words
The composition of claim 3 in which the polymer is in a solution, suspension or dispersion of alcohol and water.
Claim 8
Dependent Claim
16 words
The composition of claim 1 in which the catalytically active particle comprises a platinum group metal.
Claim 9
Dependent Claim
16 words
The composition of claim 1 in which the catalytically active particle is on a carbon support.
Claim 10
Dependent Claim
18 words
The composition of claim 1 in which the catalytically active particles are present at about 5-40 weight percent.
Claim 11
Dependent Claim
16 words
The composition of claim 1 in which the hydrocarbon is present at about 50-95 weight percent.
Claim 12
Dependent Claim
33 words
A fuel cell comprising a membrane and electrode structure wherein the electrode comprises: (a) catalytically active particles; and (b) a hydrocarbon having one or more ether or ketone linkages and an alcohol group.
Claim 13
Dependent Claim
33 words
A fuel cell comprising a membrane and electrode structure wherein the electrode comprises: (a) catalytically active particles; and (b) a hydrocarbon having one or more ether or ketone linkages and an alcohol group.
Claim 14
Dependent Claim
46 words
A membrane and electrode structure comprising: (a) an ion exchange membrane having an electrode composition applied thereto, said electrode composition comprising: (i) catalytically active particles; (ii) a hydrocarbon having one or more ether or ketone linkages and one or more alcohol groups; and (iii) a binder.
Claim 15
Dependent Claim
46 words
A membrane and electrode structure comprising: (a) an ion exchange membrane having an electrode composition applied thereto, said electrode composition comprising: (i) catalytically active particles; (ii) a hydrocarbon having one or more ether or ketone linkages and one or more alcohol groups; and (iii) a binder.
Claim 16
Dependent Claim
18 words
The composition of claim 12 in which the hydrocarbon is nonsolid at the processing temperatures of the structure.
Claim 17
Dependent Claim
28 words
The composition of claim 12 in which the hydrocarbon is selected from the group of 1-methoxy-2-propanol, 1-ethoxy-2-propanol; 1-methoxy-2-methyl-2-propanol; 1-isopropxy-2-propanol; 1-propoxy-2-propanol; 2-phenoxy-1-propanol; 2-ethoxy-1-propanol; 2,3-ethoxy-1-propanol; 2-methoxy-1-propanol; 1-butoxy-2-propanol; or mixtures thereof.
Claim 18
Dependent Claim
15 words
The composition of claim 12 in which the binder is a perfluorinated sulfonyl fluoride polymer.
Claim 19
Dependent Claim
11 words
The composition of claim 15 in which the polymer is hydrolyzed.
Claim 20
Dependent Claim
11 words
The composition of claim 15 in which the polymer is unhydrolyzed.
Claim 21
Dependent Claim
20 words
The composition of claim 15 in which the polymer is in a solution, suspension or dispersion of alcohol and water.
Claim 22
Dependent Claim
16 words
The composition of claim 12 in which the catalytically active particle comprises a platinum group metal.
Claim 23
Dependent Claim
16 words
The composition of claim 12 in which the catalytically active particle is on a carbon support.
Claim 24
Dependent Claim
18 words
The composition of claim 12 in which the catalytically active particles are present at about 5-40 weight percent.
Claim 25
Dependent Claim
20 words
The composition of claim 12 in which the hydrocarbon is present in the electrode composition at about 50-95 weight percent.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-18 | 1998-01-17 | 1998-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-18 | 2002-01-17 | 2002-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-18 | 2006-01-17 | 2006-07-19 | $7700.00 | Window Closed / Lapsed |