Patent US4352866A successfully refreshed from Google Patents.
US4352866A
Expired / Lapsed
US
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Electrochemical cell with improved cathode current collector and method
Assignee: Yardney Technical Products Inc
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Filing: 1980-01-30
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Granted: 1982-10-05
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Expires: 2000-01-30
Abstract
Abstract Disclosed is a primary electrochemical cell having an improved cathode current collector and a method for making the current collector. The cell comprises an oxidizable active anode material; and electrolytic solution comprising a reducible soluble cathode and an electrolyte solute dissolved therein; and a cathode current collector comprising a layer of finely-divided catalyst for reducing the solvent, bonded to an inert, electrically-conductive substrate. Preferably, a bonding layer, comprising a finely-divided polymer and a minor amount of conductive material, bonds the catalyst layer to the substrate. The bonding and catalyst layers preferably can be formed by sequentially applying respective dispersions thereof to the substrate, drying, and heating to bond the materials. Soluble cathode cells employing cathode current collectors of the type described have exceptionally rapid discharge properties.
Inventors
- 👤 Keith A. Klinedinst
- 👤 Francis G. Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:43
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M4/00; H01M4/86; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
99 words
A primary electrochemical cell comprising: (a) an oxidizable active anode material; (b) a cathode current collector comprising a layer of finely-divided catalyst for reducing the soluble cathode, an inert, electrically-conductive substrate, and a thin, fused, intermediate bonding layer comprising a finely-divided thermoplastic polymer and a minor amount of a finely-divided, inert, electrically-conductive material bonding the layer of finely-divided catalyst to the substrate, the thickness of the cathode current collector being less than 400 micrometers; and (c) an electrolytic solution, in contact with the anode and cathode current collector, comprising a reducible soluble cathode and an electrolyte solute dissolved therein.
Claim 2
Dependent Claim
99 words
A primary electrochemical cell comprising: (a) an oxidizable active anode material; (b) a cathode current collector comprising a layer of finely-divided catalyst for reducing the soluble cathode, an inert, electrically-conductive substrate, and a thin, fused, intermediate bonding layer comprising a finely-divided thermoplastic polymer and a minor amount of a finely-divided, inert, electrically-conductive material bonding the layer of finely-divided catalyst to the substrate, the thickness of the cathode current collector being less than 400 micrometers; and (c) an electrolytic solution, in contact with the anode and cathode current collector, comprising a reducible soluble cathode and an electrolyte solute dissolved therein.
Claim 3
Dependent Claim
13 words
A primary electrochemical cell according to claim 1 wherein the catalyst comprises gold.
Claim 4
Dependent Claim
13 words
A primary electrochemical cell according to claim 1 wherein the catalyst comprises platinum.
Claim 5
Dependent Claim
14 words
A primary electrochemical cell according to claim 1 wherein the catalyst comprises carbon black.
Claim 6
Dependent Claim
14 words
A primary electrochemical cell according to claim 1 wherein the bonding layer is porous.
Claim 7
Dependent Claim
19 words
A primary electrochemical cell according to claim 1 wherein the inert, electrically-conductive material in the bonding layer comprises carbon.
Claim 8
Dependent Claim
19 words
A primary electrochemical cell according to claim 1 wherein the bonding layer is from 5 to 50 micrometers thick.
Claim 9
Dependent Claim
14 words
A primary electrochemical cell according to claim 1 wherein the thermoplastic polymer comprises polytetrafluoroethylene.
Claim 10
Dependent Claim
22 words
A primary eletrochemical cell according to claim 1 wherein the layer of finely-divided catalyst comprises a minor amount of a thermoplastic polymer.
Claim 11
Dependent Claim
14 words
A primary electrochemical cell according to claim 9 wherein the thermoplastic polymer comprises polytetrafluoroethylene.
Claim 12
Dependent Claim
18 words
A primary electrochemical cell according to claim 1 wherein the inert, electrically-conductive substrate is a thin metal foil.
Claim 13
Dependent Claim
24 words
A primary electrochemical cell according to claim 11 wherein the oxidizable anode material comprises lithium metal and the reducible soluble cathode comprises thionyl chloride.
Claim 14
Dependent Claim
25 words
A primary electrochemical cell according to claim 1 wherein the inert, electrically-conductive substrate comprises a porous metal, which contains from 15 to 90% void space.
Claim 15
Dependent Claim
21 words
A primary electrochemical cell according to claim 1 wherein the cathode current collector has a thickness of less than 200 micrometers.
Claim 16
Dependent Claim
23 words
A primary electrochemical cell according to claim 14 wherein at least 95% of the finely-divided catalyst pass through a 100 mesh Tyler Sieve.
Claim 17
Dependent Claim
19 words
A primary electrochemical cell according to claim 15 wherein the bonding layer is from 5 to 50 micrometer thick.
Claim 18
Dependent Claim
22 words
A primary electrochemical cell according to claim 16 wherein the layer of finely-divided catalyst comprises a minor amount of a thermoplastic polymer.
Claim 19
Dependent Claim
104 words
A primary electrochemical cell comprising: (a) an oxidizable active anode material; (b) a cathode current collector comprising a layer of finely-divided catalyst for reducing the soluble cathode, the catalyst being selected from the group consisting of gold, platinum, nickel oxide and copper sulfide, an inert, electrically-conductive porous substrate, and a thin, fused, intermediate bonding layer comprising a finely-divided thermoplastic polymer and a minor amount of a finely-divided, inert, electrically-conductive material bonding the layer of finely-divided catalyst to the substrate; and (c) an electrolytic solution, in contact with the anode and cathode current collector, comprising a reducible soluble cathode and an electrolyte solute dissolved therein.
Claim 20
Dependent Claim
104 words
A primary electrochemical cell comprising: (a) an oxidizable active anode material; (b) a cathode current collector comprising a layer of finely-divided catalyst for reducing the soluble cathode, the catalyst being selected from the group consisting of gold, platinum, nickel oxide and copper sulfide, an inert, electrically-conductive porous substrate, and a thin, fused, intermediate bonding layer comprising a finely-divided thermoplastic polymer and a minor amount of a finely-divided, inert, electrically-conductive material bonding the layer of finely-divided catalyst to the substrate; and (c) an electrolytic solution, in contact with the anode and cathode current collector, comprising a reducible soluble cathode and an electrolyte solute dissolved therein.
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) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |