Patent US4730239A successfully refreshed from Google Patents.
US4730239A
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Double layer capacitors with polymeric electrolyte
Assignee: Stemcor Corp
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Filing: 1986-10-29
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Granted: 1988-03-08
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Expires: 2006-10-29
Abstract
Abstract A solid state double layer capacitor includes an organic electrolyte doped with a soluble salt to render the electrolyte ionically conductive.
Inventors
- 👤 John C. Currie
- 👤 Linda F. DiFranco
- 👤 Phillip D. Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:52
CPC Classifications
H; H01; H01G; H01G11/00; H01G11/54; H01G11/56; H01G11/22; H01G11/24; Y; Y02; Y02E; Y02E60/00; Y02E60/13
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
70 words
A double layer capacitor comprising a pair of high surface area electrodes each having an electronically conductive surface on one side thereof, said electrodes comprising carbon in particulate, fiber or cloth form, the high surface area electrodes being impregnated with a multiphasic polymeric electrolyte, said multiphasic electrolyte comprising polymer material doped with a soluble salt to confer ionic conductivity and electronically non-conductive means separating said electrodes to prevent short-circuiting therebetween.
Claim 2
Dependent Claim
70 words
A double layer capacitor comprising a pair of high surface area electrodes each having an electronically conductive surface on one side thereof, said electrodes comprising carbon in particulate, fiber or cloth form, the high surface area electrodes being impregnated with a multiphasic polymeric electrolyte, said multiphasic electrolyte comprising polymer material doped with a soluble salt to confer ionic conductivity and electronically non-conductive means separating said electrodes to prevent short-circuiting therebetween.
Claim 3
Dependent Claim
16 words
The double layer capacitor of claim 1 wherein said polymer material comprises one or more polyethers.
Claim 4
Dependent Claim
14 words
The double layer capacitor of claim 2 wherein said polymer material comprises polyethylene oxide.
Claim 5
Dependent Claim
14 words
The double layer capacitor of claim 3 wherein said polymer material comprises a plasticizer.
Claim 6
Dependent Claim
13 words
The double layer capacitor of claim 4 wherein said plasticizer is polyethylene glycol.
Claim 7
Dependent Claim
27 words
The double layer capacitor of claim 5 wherein said polyethylene glycol is present in an amount of up to about 0.5 mole fraction of said polymer material.
Claim 8
Dependent Claim
16 words
The double layer capacitor of claim 6 wherein the high surface area electrode comprises carbon cloth.
Claim 9
Dependent Claim
30 words
The double layer capacitor of claim 7 wherein said soluble salt is lithium perchlorate and is present in an amount sufficient to provide an oxygen to lithium ratio of 9:1.
Claim 10
Dependent Claim
20 words
The double layer capacitor of claim 8 wherein said electronically conductive surface consists of a metallized region on said electrode.
Claim 11
Dependent Claim
25 words
The double layer capacitor of claim 8 wherein said electronically conductive surface is provided by a carbon-loaded polymer element in electrical contact with said electrode.
Claim 12
Dependent Claim
42 words
The double layer capacitor of claim 6 wherein said soluble salt is selected from the group consisting of (C 2 H 5 ) 4 NBF 4 , (C 2 H 5 ) 4 NClO 4 , LiBF 4 and LiClO 4 .
Claim 13
Dependent Claim
21 words
The double layer capacitor of claim 5 wherein said electronically non-conductive means is a non-conductive polymer element interposed between said electrodes.
Claim 14
Dependent Claim
38 words
The double layer capacitor of claim 5 wherein said electronically non-conductive means is provided by said multiphasic polymeric electrolyte which is present in sufficient thickness on the surface of one or both said electrodes to prevent carbon-to-carbon contact.
Claim 15
Dependent Claim
14 words
The double layer capacitor of claim 2 wherein said polymer material comprises polypropylene oxide.
Claim 16
Dependent Claim
14 words
The double layer capacitor of claim 14 wherein said polymer material comprises a plasticizer.
Claim 17
Dependent Claim
13 words
The double layer capacitor of claim 15 wherein said plasticizer is polyethylene glycol.
Claim 18
Dependent Claim
23 words
The double layer capacitor of claim 16 wherein the high surface area electrode comprises carbon in the form of woven or unwoven cloth.
Claim 19
Dependent Claim
30 words
The double layer capacitor of claim 17 wherein said soluble salt is lithium perchlorate and is present in an amount sufficient to provide an oxygen to lithium ratio of 9:1.
Claim 20
Dependent Claim
20 words
The double layer capacitor of claim 18 wherein said electronically conductive surface consists of a metallized region on said electrode.
Claim 21
Dependent Claim
25 words
The double layer capacitor of claim 18 wherein said electronically conductive surface is provided by a carbon-loaded polymer element in electrical contact with said electrode.
Claim 22
Dependent Claim
21 words
The double layer capacitor of claim 18 wherein said electronically non-conductive means is a non-conductive polymer element interposed between said electrodes.
Claim 23
Dependent Claim
38 words
The double layer capacitor of claim 18 wherein said electronically non-conductive means is provided by said multiphasic polymeric electrolyte which is present in sufficient thickness on the surface of one or both said electrodes to prevent carbon-to-carbon contact.
Claim 24
Dependent Claim
43 words
The double layer capacitor of claim 16 wherein said soluble salt is selected from the group consisting of (C 2 H 5 ) 4 NBF 4 , (C 2 H 5 ) 4 NClO 4 , LiBF 4 , and LiClO 4 .
Claim 25
Dependent Claim
42 words
The double layer capacitor of claim 1 wherein said soluble salt is selected from the group consisting of (C 2 H 5 ) 4 NBF 4 , (C 2 H 5 ) 4 NClO 4 , LiBF 4 and LiClO 4 .
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-03-08 | 1991-09-07 | 1992-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-08 | 1995-09-07 | 1996-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-08 | 1999-09-07 | 2000-03-08 | $7700.00 | Window Closed / Lapsed |