US5032473A
Expired / Lapsed
US
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Electrochemical cathode
Assignee: Yardney Technical Products Inc
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Filing: 1990-04-27
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Granted: 1991-07-16
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Expires: 2010-04-27
Abstract
Abstract There is disclosed an electrochemical cathode for an electrochemical cell comprised of a current collecting layer or substrate having at least one side thereof to a layer of a nonwoven conductive fibrous web, preferably of conductive carbon fibers, impregnated with a mixture of carbon particles, carbon fibers of a length of less than about 1/8" and a nonfibrous polymeric substance, and optionally with a hydrophobic microporous film or layer disposed on the layer of the nonwoven conductive fibrous web as well as the product produced thereby.
Inventors
- 👤 William H. Hoge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:55
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/88; H01M4/8825; H01M4/8846; H01M12/00; H01M12/04; H01M12/06; H01M4/8605; H01M4/8626; H01M4/8631; H01M4/8663; H01M4/8668; H01M4/8803; H01M4/8807; H01M4/96; H01M8/00; H01M8/02; H01M8/0202; H01M8/023; H01M8/0234; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
65 words
A electrochemical cathode, which comprises: a current collecting substrate capable of being connected to electrical circuitry; and a conductive nonwoven web laminated to at least one side of said current collecting substrate and impregnated with a mixture of carbon particles, carbon fibers and a nonfibrous polymeric substance for holding said carbon particles in said web, said conductive nonwoven web being formed of conductive carbon fibers.
Claim 2
Dependent Claim
65 words
A electrochemical cathode, which comprises: a current collecting substrate capable of being connected to electrical circuitry; and a conductive nonwoven web laminated to at least one side of said current collecting substrate and impregnated with a mixture of carbon particles, carbon fibers and a nonfibrous polymeric substance for holding said carbon particles in said web, said conductive nonwoven web being formed of conductive carbon fibers.
Claim 3
Dependent Claim
21 words
The electrochemical cathode as defined in claim 1 and further including a hydrophobic polymeric film bonded to said conductive nonwoven web.
Claim 4
Dependent Claim
26 words
The electrochemical cathode as defined in claim 1 wherein said carbon fibers of said impregnation mixture are of a length of less than about 150 ".
Claim 5
Dependent Claim
22 words
The electrochemical cathode as defined in claim 3 wherein said carbon fibers are of a diameter of from about 5.0 15.0 μ.
Claim 6
Dependent Claim
25 words
The electrochemical cathode as defined in claim 3 wherein said carbon fibers constitute of from 1 to 5 percent by weight of said impregnation mixture.
Claim 7
Dependent Claim
22 words
The electrochemical cathode as defined in claim 4 wherein sadi carbon fibers preferably constitute 2 percent by weight of said impregnation mixture.
Claim 8
Dependent Claim
27 words
The electrochemical cathode as defined in claim 3 wherein said carbon fibers of said nonwoven web are of a diameter of from about 0.5 to 1.25 inches.
Claim 9
Dependent Claim
21 words
The electrochemical cathode as defined in claim 3 wherein said carbon fibers exhibit a resistance of less than about 20 ohms/sq.
Claim 10
Dependent Claim
25 words
The electrochemical cathode as defined in claim 3 wherein said conductive nonwoven web provides a front-to-back electrical conductivity of less than about pb 1 ohm.
Claim 11
Dependent Claim
23 words
The electrochemical cathode as defined in claim 3 wherein said carbon particles have a surface area greater than about 1000 m. 2 /g.
Claim 12
Dependent Claim
16 words
The electrochemcial cathode as defined in claim 3 wherein said current collecting substrate is metal mesh.
Claim 13
Dependent Claim
24 words
The electrochemical cathode as defined in claim 3 wherein said current collecting substrate is bonded by a sealing material to said conductive nonwoven web.
Claim 14
Dependent Claim
17 words
The electrochemical cathode as defined in claim 12 wherein said sealing material is a dispersion of PTFE.
Claim 15
Dependent Claim
14 words
The electrochemical cathode as defined in claim 3 wherein said mixture includes a catalyst.
Claim 16
Dependent Claim
23 words
Teh electrochemical cathode as defined in claim 14 wherein said catalyst is selected from the group consisting of potassium premanganate and silver oxide.
Claim 17
Dependent Claim
53 words
A bipolar electrode, which comprises: a metallic anode layer; and a current collecting substrate laminated to a conductive nonwoven web impregnated with a mixture of carbon particles, carbon fibers and a nonfibrous polymeric substance for holding said carbon particles in said nonwoven web, said conductive nonwoven web being formed of conductive carbon fibers.
Claim 18
Dependent Claim
53 words
A bipolar electrode, which comprises: a metallic anode layer; and a current collecting substrate laminated to a conductive nonwoven web impregnated with a mixture of carbon particles, carbon fibers and a nonfibrous polymeric substance for holding said carbon particles in said nonwoven web, said conductive nonwoven web being formed of conductive carbon fibers.
Claim 19
Dependent Claim
25 words
The bipolar electrode as defined in claim 16 wherein said carbon fibers of said impregnation mixture are of a length of less than about 1/8".
Claim 20
Dependent Claim
27 words
The bipolar electrode as defined in claim 17 wherein said carbon fibers, of said nonwoven web are of a diameter of from about 5.0 to 15.0 μ.
Claim 21
Dependent Claim
23 words
The bipolar electrode as defined in claim 18 wherein said carbon fibers are of a diameter of from about 0.5 to 1.25 inches.
Claim 22
Dependent Claim
25 words
The bipolar electrode as defined in claim 18 wherein said carbon fibers constitute of from 1 to 5 percent by weight of said impregnation mixture.
Claim 23
Dependent Claim
22 words
The bipolar electrode as defined in claim 20 wherein said carbon fibers preferably constitute 2 percent by weight of said impregnation mixture.
Claim 24
Dependent Claim
26 words
The bipolar electrode as defined in claim 18 wherein said carbon fibers of said conductive nonwoven web exhibit a resistance of less than about 20 ohms/sq.
Claim 25
Dependent Claim
24 words
The bipolar electrode as defined in claim 18 wherein said conductive nonwoven web provides a front-to-back electrical conductivity of less than about 1 ohm.
Claim 26
Dependent Claim
21 words
The bipolar electrode as defined in claim 18 wherein said carbon particles have a surface area greater than about 1000 m.2/g.
Claim 27
Dependent Claim
16 words
The bipolar electrode as defined in claim 18 wherein said current collecting substrate is metal mesh.
Claim 28
Dependent Claim
24 words
The bipolar electrode as defined in claim 18 wherein said current collecting substrate is bonded by a sealing material to said conductive nonwoven web.
Claim 29
Dependent Claim
17 words
The bipolar electrode as defined in claim 26 wherein said sealing material is a dispersion of PTFE.
Claim 30
Dependent Claim
14 words
The bipolar electrode as defined in claim 16 wherein said mixture includes a catalyst.
Claim 31
Dependent Claim
23 words
The bipolar electrode as defined in claim 28 wherein said catalyst is selected from the group consisting of potassium permangante and silver oxide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-15 | 1995-01-14 | 1995-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-15 | 1999-01-14 | 1999-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-15 | 2003-01-14 | 2003-07-16 | $7700.00 | Window Closed / Lapsed |