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US5023149A
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US
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Electrochemistry employing polyaniline
Assignee: University Patents Inc
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Filing: 1988-06-03
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Granted: 1991-06-11
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Expires: 2008-06-03
Abstract
Abstract Electrochemical cells including secondary batteries and fuel cells are provided employing polyanilines having improved reversibility, stability and electrochemical properties. In accordance with a preferred embodiment polyaniline is employed as a cathode active polymer in a secondary battery at a pH between about 1 and 11. In accordance with nother embodiments, fuel cells employing polyaniline are provided as are batteries wherein polyanilines are used as anodes.
Inventors
- 👤 Alan G. MacDiarmid
- 👤 Nanayakkara L. D. Somasiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:08
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/22; H01M10/00; H01M10/36; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/68; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
39 words
A secondary battery comprising an anode means, a cathode means and an electrolyte, the anode means being stable in the electrolyte, the cathode means comprising an aniline polymer, the electrolyte being maintained at a pH between 2 and 11.
Claim 2
Dependent Claim
39 words
A secondary battery comprising an anode means, a cathode means and an electrolyte, the anode means being stable in the electrolyte, the cathode means comprising an aniline polymer, the electrolyte being maintained at a pH between 2 and 11.
Claim 3
Dependent Claim
11 words
The battery of claim 1 wherein the aniline polymer comprises polyaniline.
Claim 4
Dependent Claim
20 words
The battery of claim 2 wherein the polymer comprises polyaniline 2A or a mixture of polyaniline 1A and polyaniline 2A.
Claim 5
Dependent Claim
14 words
The battery of claim 1 wherein said pH is maintained between 3.2 and 5.
Claim 6
Dependent Claim
11 words
The battery of claim 1 wherein the polymer comprises substituted polyaniline.
Claim 7
Dependent Claim
21 words
The battery of claim 1 wherein the anode comprises a material having a reduction potential of less than about +0.64 volts.
Claim 8
Dependent Claim
11 words
The battery of claim 6 wherein the anode comprises a metal.
Claim 9
Dependent Claim
13 words
The battery of claim 1 further comprising buffer means to maintain said pH.
Claim 10
Dependent Claim
13 words
The battery of claim 1 substantially recyclable in excess of about 100 times.
Claim 11
Dependent Claim
12 words
The battery of claim 1 wherein the anode comprises an aniline polymer.
Claim 12
Dependent Claim
18 words
The battery of claim 10 wherein the anode and cathode form portions of a unitary mass of material.
Claim 13
Dependent Claim
14 words
The battery of claim 11 wherein the unitary mass is impregnated with the electrolyte.
Claim 14
Dependent Claim
10 words
The battery of claim 1 further comprising conductivity enhancing material.
Claim 15
Dependent Claim
11 words
The battery of claim 13 wherein the enhancing material comprises carbon.
Claim 16
Dependent Claim
16 words
The battery of claim 1 wherein the cathode comprises the aniline polymer on a current collector.
Claim 17
Dependent Claim
15 words
The battery of claim 15 wherein the polymer is in the form of a film.
Claim 18
Dependent Claim
20 words
The battery of claim 1 wherein the aniline polymer cycles between forms 1A and 2A upon cycling of the battery.
Claim 19
Dependent Claim
25 words
The battery of claim 1 wherein aniline polymer cycles among one or more of the forms of polyaniline depicted in FIG. 1 or mixtures thereof.
Claim 20
Dependent Claim
20 words
The battery of claim 1 wherein the polyaniline cycles among the five forms of polyaniline as depicted in FIG. 1.
Claim 21
Dependent Claim
49 words
A secondary battery comprising an anode means, a cathode means and an aqueous electrolyte, the anode means comprising an aniline polymer, the cathode means comprising a material having a positive reduction potential and being stable in the electrolyte, the electrolyte being maintained at a pH between 2 and 6.
Claim 22
Dependent Claim
49 words
A secondary battery comprising an anode means, a cathode means and an aqueous electrolyte, the anode means comprising an aniline polymer, the cathode means comprising a material having a positive reduction potential and being stable in the electrolyte, the electrolyte being maintained at a pH between 2 and 6.
Claim 23
Dependent Claim
11 words
The battery of claim 20 wherein the aniline polymer comprises polyaniline.
Claim 24
Dependent Claim
14 words
The battery of claim 20 wherein said pH is maintained between 3.2 and 5.
Claim 25
Dependent Claim
11 words
The battery of claim 20 wherein the polymer comprises substituted polyaniline.
Claim 26
Dependent Claim
12 words
The battery of claim 20 wherein the cathode comprises an organic composition.
Claim 27
Dependent Claim
14 words
The battery of claim 20 wherein the cathode comprises an oxide of a metal.
Claim 28
Dependent Claim
12 words
The battery of claim 20 wherein the cathode comprises a p-doped polymer.
Claim 29
Dependent Claim
13 words
The battery of claim 20 further comprising buffer means to maintain the pH.
Claim 30
Dependent Claim
32 words
A fuel cell comprising anode means, cathode means and electrolyte, at least one of the electrodes comprising an aniline polymer, said electrolyte being maintained at a pH between about 2 and 11.
Claim 31
Dependent Claim
32 words
A fuel cell comprising anode means, cathode means and electrolyte, at least one of the electrodes comprising an aniline polymer, said electrolyte being maintained at a pH between about 2 and 11.
Claim 32
Dependent Claim
13 words
The cell of claim 28 maintained at a pH between 3.2 and 5.
Claim 33
Dependent Claim
13 words
The cell of claim 28 wherein each of the electrodes comprise aniline polymer.
Claim 34
Dependent Claim
16 words
The cell of claim 30 wherein the electrodes comprise portions of a unitary mass of polymer.
Claim 35
Dependent Claim
14 words
The cell of claim 31 wherein the unitary mass is impregnated by the electrolyte.
Claim 36
Dependent Claim
10 words
The cell of claim 28 wherein the polymer comprises polyaniline.
Claim 37
Dependent Claim
18 words
The cell of claim 28 wherein the aniline polymer is in form 1A or 2A or mixtures thereof.
Claim 38
Dependent Claim
13 words
The cell of claim 28 further comprising buffer means to maintain said pH.
Claim 39
Dependent Claim
10 words
The cell of claim 28 further comprising conductivity enhancing material.
References Cited (Backward Citations)
GB1216549A
Cited
FR2553581A1
Cited
JPS60221973A
Cited
JPS60221964A
Cited
JPS60249265A
Cited
JPS6168864A
Cited
DE3443455A1
Cited
JPS61161673A
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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) | 1994-06-10 | 1994-12-10 | 1995-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-10 | 1998-12-10 | 1999-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-10 | 2002-12-10 | 2003-06-11 | $7700.00 | Window Closed / Lapsed |