US4608322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonaqueous electrochemical cell
Assignee: Medtronic Inc
•
Filing: 1984-09-28
•
Granted: 1986-08-26
•
Expires: 2004-09-28
Abstract
Abstract A nonaqueous cell comprising an active metal anode, such as a lithium, sodium, potassium, calcium or alloys, a liquid cathode-electrolyte comprising a solute dissolved in a solvent which, in a preferred aspect, is an oxyhalide of an element of Group V or Group VI of the Periodic Table and wherein the surface of the anode contacting the cathode-electrolyte is coated with a polymeric film having ether linkages. In a preferred practice of the present invention, the anode is coated with polyethersulfone.
Inventors
- 👤 William G. Howard
- 👤 David R. Berberick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:06
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M4/00; H01M4/02; H01M4/06; H01M4/08; H01M4/12; H01M50/00; H01M50/40; H01M50/46; H01M2300/00; H01M2300/0017; H01M2300/002; H01M2300/0025
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
39 words
A nonaqueous electrochemical cell comprising in operative relationship, a. a cathode current collector: b. an ionically conductive, liquid cathode-electrolyte solution; and c. a active metal anode, the anode having on its surface which contacts the cathode-electrolyte a polyether film.
Claim 2
Dependent Claim
39 words
A nonaqueous electrochemical cell comprising in operative relationship, a. a cathode current collector: b. an ionically conductive, liquid cathode-electrolyte solution; and c. a active metal anode, the anode having on its surface which contacts the cathode-electrolyte a polyether film.
Claim 3
Dependent Claim
15 words
An electrochemical cell according to claim 1 wherein the cathode current collector comprises porous carbon.
Claim 4
Dependent Claim
34 words
An electrochemical cell according to claim 1 wherein the cathode-electrolyte solution comprises a solute dissolved in a liquid active cathode depolarizer of an element of Group V or Group VI of the Periodic Table.
Claim 5
Dependent Claim
20 words
An electrochemical cell according to claim 3 wherein the solute is lithium aluminum chloride and the solvent is thionyl chloride.
Claim 6
Dependent Claim
37 words
An electrochemical cell according to claim 1 wherein the active metal anode is selected from the group consisting of lithium, Group IA, IIA, or III elements of the Periodic Table of the Periodic Table or alloys thereof.
Claim 7
Dependent Claim
23 words
An electrochemical cell according to claim 1 wherein the polyether film has a thickness in the range of about 0.0001 to 0.01 inch.
Claim 8
Dependent Claim
14 words
An electrochemical cell according to claim 1 wherein the polyether film is polyethylene oxide.
Claim 9
Dependent Claim
13 words
An electrochemical cell according to claim 1 wherein the polyether film is polyethersulfone.
Claim 10
Dependent Claim
19 words
An electrochemical cell according to claim 1 wherein the polyether film is a mixture of polyethersulfone and polyethylene oxide.
Claim 11
Dependent Claim
39 words
An nonaqueous electrochemical cell comprising in operative relationship, a. a cathode current collector: b. an ionically conductive, liquid cathode-electrolyte solution; and c. an active metal anode, the anode having on its surface which contacts the cathode-electrolyte a polyethersulfone film.
Claim 12
Dependent Claim
39 words
An nonaqueous electrochemical cell comprising in operative relationship, a. a cathode current collector: b. an ionically conductive, liquid cathode-electrolyte solution; and c. an active metal anode, the anode having on its surface which contacts the cathode-electrolyte a polyethersulfone film.
Claim 13
Dependent Claim
15 words
An electrochemical cell according to claim 10 wherein the cathode current collector comprises porous carbon.
Claim 14
Dependent Claim
34 words
An electrochemical cell according to claim 10 wherein the cathode-electrolyte solution comprises a solute dissolved in a liquid active cathode depolarizer of an element of Group V or Group VI of the Periodic Table.
Claim 15
Dependent Claim
20 words
An electrochemical cell according to claim 12 wherein the solute is lithium aluminum chloride and the solvent is thionyl chloride.
Claim 16
Dependent Claim
32 words
An electrochemical cell according to claim 10 wherein the active metal anode is selected from the group consisting of lithium, Groups IA, IIA, or III of the periodic table or alloys thereof.
Claim 17
Dependent Claim
23 words
An electrochemical cell according to claim 10 wherein the polyethersulfone film has a thickness in the range of about 0.0001 to 0.01 inch.
Claim 18
Dependent Claim
59 words
An electrochemical cell according to claim 10 wherein the polyethersulfone is of the structure: ##STR4## wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are separately and independently hydrogen, lower alkyl and "n" has a value in the range of about 10 to 1000.
Claim 19
Dependent Claim
41 words
An electrochemical cell according to claim 10 wherein the polyethersulfone is of the structure: ##STR5## R 1 -R 8 are separately and independently hydrogen or lower alkyl and wherein "n" has a value in the range of about 10 to 1000.
Claim 20
Dependent Claim
15 words
An electrochemical cell according to claim 17 wherein R 1 -R 8 are all hydrogen.
Claim 21
Dependent Claim
95 words
A nonaqueous electrochemical cell comprising in operative relationship, a. A cathode current collector; b. an ionically conductive, liquid cathode-electrolyte solution comprising a solute dissolved in a liquid active cathode depolarizer of an element of Group V or Group VI of the Periodic Table; and c. an active metal anode, the anode having on its surface which contacts the cathode-electrolyte an adherence, ionically permeable polyethersulfone film of the structure: ##STR6## wherein R 1 -R 8 are separately and independently hydrogen or lower alkyl, and "n" has a value in the range of about 10 to 1,000.
Claim 22
Dependent Claim
95 words
A nonaqueous electrochemical cell comprising in operative relationship, a. A cathode current collector; b. an ionically conductive, liquid cathode-electrolyte solution comprising a solute dissolved in a liquid active cathode depolarizer of an element of Group V or Group VI of the Periodic Table; and c. an active metal anode, the anode having on its surface which contacts the cathode-electrolyte an adherence, ionically permeable polyethersulfone film of the structure: ##STR6## wherein R 1 -R 8 are separately and independently hydrogen or lower alkyl, and "n" has a value in the range of about 10 to 1,000.
Claim 23
Dependent Claim
15 words
An electrochemical cell according to claim 19 wherein the active cathode depolarizer is thionyl chloride.
Claim 24
Dependent Claim
14 words
An electrochemical cell according to claim 20 wherein the active metal anode is lithium.
Claim 25
Dependent Claim
14 words
An electrochemical cell according to claim 20 wherein the solute is LiAlCl 4 .
Claim 26
Dependent Claim
23 words
An electrochemical cell according to claim 20 wherein the polyethersulfone film has a thickness in the range of about 0.0001 to 0.01 inch.
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) | 1989-08-25 | 1990-02-24 | 1990-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-25 | 1994-02-24 | 1994-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-25 | 1998-02-24 | 1998-08-26 | $7700.00 | Window Closed / Lapsed |