US5368959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current collectors for electrochemical cells and batteries
Assignee: Valence Technology Inc
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Filing: 1993-03-30
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Granted: 1994-11-29
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Expires: 2013-03-30
Abstract
Abstract In an electrochemical lithium cell having a negative electrode, a positive electrode and an electrolyte separator there is provided a positive electrode current collector which comprises a redox active conductive polymer.
Inventors
- 👤 Rene Koksbang
- 👤 Ib I. Olsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:14
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/668; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
71 words
A battery having a positive electrode comprising a current collector, and a layer comprising an intercalation cathode active material having a reversible lithium insertion ability, said layer having a major surface in electrical contact with the current collector, the improvement comprising: the current collector comprising a conductive polymer having a number of cyclic monomeric units selected from the group consisting of substituted and unsubstituted: aniline, pyrrole, thiophene, phenylene and mixtures thereof.
Claim 2
Dependent Claim
71 words
A battery having a positive electrode comprising a current collector, and a layer comprising an intercalation cathode active material having a reversible lithium insertion ability, said layer having a major surface in electrical contact with the current collector, the improvement comprising: the current collector comprising a conductive polymer having a number of cyclic monomeric units selected from the group consisting of substituted and unsubstituted: aniline, pyrrole, thiophene, phenylene and mixtures thereof.
Claim 3
Dependent Claim
12 words
The battery according to claim 1 wherein the monomeric units are unsubstituted.
Claim 4
Dependent Claim
12 words
The battery according to claim 1 wherein the monomeric units are substituted.
Claim 5
Dependent Claim
20 words
The battery according to claim 1 wherein the conductive polymer is in the form of a thin sheet or foil.
Claim 6
Dependent Claim
27 words
The battery according to claim 1 wherein the conductive polymer is in the form of a coating carried on the major surface of the cathode active layer.
Claim 7
Dependent Claim
17 words
The battery according to claim 1 wherein the current collector has a thickness of about 50 microns.
Claim 8
Dependent Claim
55 words
The battery according to claim 1 wherein the intercalation material is a transition metal chalcogen, the transition metal is at least one selected from the group consisting of Ti, V, Cr, Mn, Fe, Nb, Mo, Ta and W, and the chalcogen is at least one selected from the group consisting of O, S, and Se.
Claim 9
Dependent Claim
73 words
A positive electrode comprising a current collector, and a layer comprising an intercalation cathode active material having a reversible lithium insertion ability, said layer having a major surface in electrical contact with the current collector, the improvement comprising: the current collector comprising a conductive polymer having single and double bonds alternating along a main polymer chain and selected from the group consisting of substituted and unsubstituted; polyaniline, polypyrrole, polythiophene, polyphenylene and mixtures thereof.
Claim 10
Dependent Claim
73 words
A positive electrode comprising a current collector, and a layer comprising an intercalation cathode active material having a reversible lithium insertion ability, said layer having a major surface in electrical contact with the current collector, the improvement comprising: the current collector comprising a conductive polymer having single and double bonds alternating along a main polymer chain and selected from the group consisting of substituted and unsubstituted; polyaniline, polypyrrole, polythiophene, polyphenylene and mixtures thereof.
Claim 11
Dependent Claim
18 words
The positive electrode according to claim 8 wherein the current collector has a thickness of about 50 microns.
Claim 12
Dependent Claim
56 words
The positive electrode according to claim 8 wherein the intercalation material is a transition metal chalcogen, the transition metal is at least one selected from the group consisting of Ti, V, Cr, Mn, Fe, Nb, Mo, Ta and W, and the chalcogen is at least one selected from the group consisting of O, S, and Se.
Claim 13
Dependent Claim
20 words
The battery according to claim 8 wherein the conductive polymer is in the form of a thin sheet or foil.
Claim 14
Dependent Claim
27 words
The battery according to claim 8 wherein the conductive polymer is in the form of a coating carried on the major surface of the cathode active layer.
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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) | 1997-11-28 | 1998-05-30 | 1998-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-28 | 2002-05-30 | 2002-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-28 | 2006-05-30 | 2006-11-29 | $7700.00 | Window Closed / Lapsed |