Patent US4278745A successfully refreshed from Google Patents.
US4278745A
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Cathode materials for electrochemical cells
Assignee: Medtronic Inc
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Filing: 1980-02-25
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Granted: 1981-07-14
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Expires: 2000-02-25
Abstract
Abstract Novel cathode materials for use in electrochemical cells are disclosed. The cathode materials consist essentially of a conductive solution comprised of iodine dissolved in a mixture of two organic pyridine-based constituents, both of which function as donors to form complexes with iodine. Preferably, the cathode materials further include, in addition to the dissolved iodine, an iodine solid phase suspended therein. Large amounts of the iodine solid phase, relative to the dissolved iodine, may be used.
Inventors
- 👤 Paul M. Skarstad
- 👤 Darrel F. Untereker
- 👤 Arthur J. Coury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:13
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/60; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
82 words
As a cathode material for electrochemical cells, a combination consisting essentially of a conductive mixture comprising a first constituent selected from the group consisting of monomeric substituted pyridines, dimeric substituted pyridines, derivatives of dimeric substituted pyridines, monomeric quinoline, monomeric substituted quinolines, trimeric substituted pyridines, derivatives of trimeric substituted pyridines and mixtures thereof; a second constituent selected from the group consisting of poly-2-vinylpyridine; poly-4-vinylpyridine; poly-2-vinylquinoline; poly-2-methyl-5-vinylpyridine; copolymers thereof; pyridine; 1,2-bis(4-pyridyl)ethylene; 1,2-bis(2-pyridyl)ethylene; 2,2'-dipyridyl; 4,4'-dipyridyl; 2,4'-dipyridyl, and mixtures thereof, and a third constituent comprising iodine.
Claim 2
Dependent Claim
82 words
As a cathode material for electrochemical cells, a combination consisting essentially of a conductive mixture comprising a first constituent selected from the group consisting of monomeric substituted pyridines, dimeric substituted pyridines, derivatives of dimeric substituted pyridines, monomeric quinoline, monomeric substituted quinolines, trimeric substituted pyridines, derivatives of trimeric substituted pyridines and mixtures thereof; a second constituent selected from the group consisting of poly-2-vinylpyridine; poly-4-vinylpyridine; poly-2-vinylquinoline; poly-2-methyl-5-vinylpyridine; copolymers thereof; pyridine; 1,2-bis(4-pyridyl)ethylene; 1,2-bis(2-pyridyl)ethylene; 2,2'-dipyridyl; 4,4'-dipyridyl; 2,4'-dipyridyl, and mixtures thereof, and a third constituent comprising iodine.
Claim 3
Dependent Claim
15 words
The cathode material of claim 1 wherein the first constituent is substantially saturated with iodine.
Claim 4
Dependent Claim
10 words
The cathode material of claim 1 including excess solid iodine.
Claim 5
Dependent Claim
27 words
The cathode material of claim 1 wherein the first constituent is present in an amount of at least about 5% by weight relative to the second constituent.
Claim 6
Dependent Claim
36 words
The cathode material of claim 1 wherein the first and second constituents are respectively selected from the group consisting of 2-vinylpyridine and poly-2-vinylpyridine, 2-ethylpyridine and poly-2-vinylpyridine, 2-ethylpyridine and pyridine, 4-vinylpyridine and poly-4-vinylpyridine, and 4-ethylpyridine and poly-4-vinylpyridine.
Claim 7
Dependent Claim
15 words
The cathode material of claim 5 wherein the first constituent is substantially saturated with iodine.
Claim 8
Dependent Claim
10 words
The cathode material of claim 5 including excess solid iodine.
Claim 9
Dependent Claim
27 words
The cathode material of claim 5 wherein the first constituent is present in an amount of at least about 5% by weight relative to the second constituent.
Claim 10
Dependent Claim
92 words
An electrochemical cell comprising an anode and a cathode in operative relationship, the cathode comprising a combination consisting essentially of a conductive mixture comprising a liquid-iodine-complex-forming first constituent selected from the group consisting of monomeric substituted pyridines, dimeric substituted pyridines, derivatives of dimeric substituted pyridines, monomeric quinoline, monomeric substituted quinolines, trimeric substituted pyridines, derivatives of trimeric substituted pyridines, and mixtures thereof; an iodine-complex-forming second constituent selected from the group consisting of poly-2-vinylpyridine; poly-4-vinylpyridine; poly-2-vinylquinoline; poly-2-methyl-5-vinylpyridine; copolymers thereof; pyridine; 1,2-bis(4-pyridyl)ethylene; 1,2-bis(2-pyridyl)ethylene; 2,2'-dipyridyl; 4,4'-dipyridyl; 2,4'-dipyridyl, and mixtures thereof and a third constituent comprising iodine.
Claim 11
Dependent Claim
92 words
An electrochemical cell comprising an anode and a cathode in operative relationship, the cathode comprising a combination consisting essentially of a conductive mixture comprising a liquid-iodine-complex-forming first constituent selected from the group consisting of monomeric substituted pyridines, dimeric substituted pyridines, derivatives of dimeric substituted pyridines, monomeric quinoline, monomeric substituted quinolines, trimeric substituted pyridines, derivatives of trimeric substituted pyridines, and mixtures thereof; an iodine-complex-forming second constituent selected from the group consisting of poly-2-vinylpyridine; poly-4-vinylpyridine; poly-2-vinylquinoline; poly-2-methyl-5-vinylpyridine; copolymers thereof; pyridine; 1,2-bis(4-pyridyl)ethylene; 1,2-bis(2-pyridyl)ethylene; 2,2'-dipyridyl; 4,4'-dipyridyl; 2,4'-dipyridyl, and mixtures thereof and a third constituent comprising iodine.
Claim 12
Dependent Claim
14 words
The cell of claim 9 wherein the first constituent is substantially saturated with iodine.
Claim 13
Dependent Claim
13 words
The cell of claim 9 wherein the cathode material includes excess solid iodine.
Claim 14
Dependent Claim
10 words
The cell of claim 9 wherein the anode is lithium.
Claim 15
Dependent Claim
12 words
The cell of claim 9 wherein the anode is a lithium-rich alloy.
Claim 16
Dependent Claim
10 words
The cell of claim 9 wherein the anode is silver.
Claim 17
Dependent Claim
27 words
The cathode material of claim 9 wherein the first constituent is present in an amount of at least about 5% by weight relative to the second constituent.
Claim 18
Dependent Claim
39 words
The cell of claim 9 wherein the first and second constituents of the cathode material are respectively selected from the group consisting of 2-vinylpyridine and poly-2-vinylpyridine, 2-ethylpyridine and poly-2-vinylpyridine, 2-ethylpyridine and pyridine, 4-vinylpyridine and poly-4-vinylpyridine, and 4-ethylpyridine and poly-4-vinylpyridine.
Claim 19
Dependent Claim
14 words
The cell of claim 16 wherein the first constituent is substantially saturated with iodine.
Claim 20
Dependent Claim
13 words
The cell of claim 16 wherein the cathode material includes excess solid iodine.
Claim 21
Dependent Claim
27 words
The cathode material of claim 16 wherein the first constituent is present in an amount of at least about 5% by weight relative to the second constituent.
Claim 22
Dependent Claim
53 words
As a cathode material for electrochemical cells, a combination consisting essentially of a conductive viscous mixture comprising a pyridine derivative as a first constituent, an iodine-complex-forming second constituent selected from the group consisting of vinylpyridine-based polymers; copolymers thereof; pyridine; 1,2-bis(4-pyridyl)ethylene; 1,2-bis(2-pyridyl)ethylene; 2,2'-dipyridyl; 4,4'-dipyridyl; 2,4'-dipyridyl, and mixtures thereof, and a third constituent comprising iodine.
Claim 23
Dependent Claim
53 words
As a cathode material for electrochemical cells, a combination consisting essentially of a conductive viscous mixture comprising a pyridine derivative as a first constituent, an iodine-complex-forming second constituent selected from the group consisting of vinylpyridine-based polymers; copolymers thereof; pyridine; 1,2-bis(4-pyridyl)ethylene; 1,2-bis(2-pyridyl)ethylene; 2,2'-dipyridyl; 4,4'-dipyridyl; 2,4'-dipyridyl, and mixtures thereof, and a third constituent comprising iodine.
Claim 24
Dependent Claim
15 words
The cathode material of claim 20 wherein the first constituent is substantially saturated with iodine.
Claim 25
Dependent Claim
10 words
The cathode material of claim 20 including excess solid iodine.
Claim 26
Dependent Claim
27 words
The cathode material of claim 20 wherein the first constituent is present in an amount of at least about 5% by weight relative to the second constituent.
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) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |