US5424151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode composition and method of making same
Assignee: Valence Technology Inc
•
Filing: 1994-06-14
•
Granted: 1995-06-13
•
Expires: 2014-06-14
Abstract
Abstract In accordance with the invention, a new cathode composition is prepared in a preferred method, in situ, in a cell whereby such in situ formation results in enhanced contact between the cathode composition and the current collector and between the electrolyte layer and the cathode composition. The new cathode composition of the invention comprises first and second polymeric materials, the first being radiation cured and ionically conductive and the second being electrochemically cured and electrically conductive. Preferably, the first is radiation cured before the second is electrochemically cured. The second polymeric material is cured in an electrochemical cell which comprises an alkali metal-containing anode layer. The cell desirably contains an electrolyte which consists of a solid ionically conductive polymeric material.
Inventors
- 👤 Rene Koksbang
- 👤 Ib I. Olsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:09
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/052; H01M10/056; H01M10/0564; H01M10/0565; H01M4/00; H01M4/02; H01M4/04; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/49115
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
58 words
An electrochemical cell comprising an anode (negative electrode); a cathode (positive electrode); and an electrolyte layer disposed between the anode and the cathode, the improvement wherein the cathode comprises two polymeric materials, one being an ionically conductive polymer and the other one being an electrically conductive polymer having single and double bonds alternating along a main polymer chain.
Claim 2
Dependent Claim
58 words
An electrochemical cell comprising an anode (negative electrode); a cathode (positive electrode); and an electrolyte layer disposed between the anode and the cathode, the improvement wherein the cathode comprises two polymeric materials, one being an ionically conductive polymer and the other one being an electrically conductive polymer having single and double bonds alternating along a main polymer chain.
Claim 3
Dependent Claim
68 words
An electrochemical cell comprising a) an anode (negative electrode) comprising lithium; b) an electrolyte layer comprising a lithium salt and an ionically conductive polymer; c) a cathode (positive electrode) having a composition comprising first and second polymeric materials, the first being an electrically conductive polymer having single and double bonds alternating along a main polymer chain and the second being an ionically conductive polymer having ethene-based repeat units.
Claim 4
Dependent Claim
68 words
An electrochemical cell comprising a) an anode (negative electrode) comprising lithium; b) an electrolyte layer comprising a lithium salt and an ionically conductive polymer; c) a cathode (positive electrode) having a composition comprising first and second polymeric materials, the first being an electrically conductive polymer having single and double bonds alternating along a main polymer chain and the second being an ionically conductive polymer having ethene-based repeat units.
Claim 5
Dependent Claim
29 words
The cell according to claim 2 wherein the first material is at least one selected from the group consisting of polyaniline, polypyrrole, polythiophene, polyphenylene and derivatives and mixtures thereof.
Claim 6
Dependent Claim
16 words
The cell according to claim 2 wherein the ethene-based repeat units contain at least one heteroatom.
Claim 7
Dependent Claim
132 words
The cell according to claim 4 wherein the second material is represented as polymers having the repeating unit ##STR5## wherein R is hydrogen or a group Ra, --CH 2 ORa, --CH 2 OReRa, --CH 2 N(CH 3 ) 2 , in which Ra is an alkyl group containing 1 to 16 carbon atoms and preferably 1 to 4 carbon atoms or a cycloalkyl group containing 5 to 8 carbon atoms, and Re is an ether group of formula --CH 2 --CH 2 Op-- wherein p is a number from 1 to 100 g, preferably 1 or 2: or having the repeating unit ##STR6## wherein R' is Ra or ReRa, as defined above; or having a repeating unit ##STR7## wherein Re and Ra are as defined above and copolymers of the above polymers.
Claim 8
Dependent Claim
28 words
The cell according to claim 2 wherein the anode consists essentially of a metal foil coated with one of lithium, a lithium alloy and a compound containing lithium.
Claim 9
Dependent Claim
22 words
The cell according to claim 2 wherein the cathode comprises an electrically conductive substrate and the cathode composition carried on such substrate.
Claim 10
Dependent Claim
50 words
The cell according to claim 2 wherein the second material is represented as polymers having the repeating unit of any of the following formulae (I)-(III) below: ##STR8## where n is about 3 to 50 and R is hydrogen or a C1-C3 alkyl group, which are terminated moieties represented by A.
Claim 11
Dependent Claim
19 words
The cell according to claim 8 wherein the moieties represented by A are ethylenically unsaturated moieties or glycidyl moieties.
Claim 12
Dependent Claim
19 words
The cell according to claim 4 wherein the heteroatom is selected from the group consisting of nitrogen and oxygen.
Claim 13
Dependent Claim
27 words
The cell according to claim 1 wherein the electrically conductive polymer is selected from the group consisting of polyaniline, polypyrrole, polythiophene, polyphenylene and derivatives and mixtures thereof.
Claim 14
Dependent Claim
22 words
The cell according to claim 1 wherein the ionically conductive polymer has ethene-based repeat units, each unit containing at least one heteroatom.
Claim 15
Dependent Claim
19 words
The cell according to claim 12 wherein the heteroatom is selected from the group consisting of nitrogen and oxygen.
References Cited (Backward Citations)
US4175055A
Cited
US4640749A
Cited
US4544615A
Cited
US4569734A
Cited
US4582575A
Cited
US4935319A
Cited
US4818646A
Cited
US4792504A
Cited
US4830939A
Cited
US4830939B1
Cited
US4987042A
Cited
US4879190A
Cited
US4990413A
Cited
US4935317A
Cited
US5262254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-06-12 | 1998-12-12 | 1999-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-12 | 2002-12-12 | 2003-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-12 | 2006-12-12 | 2007-06-13 | $7700.00 | Window Closed / Lapsed |