Patent US4145806A successfully refreshed from Google Patents.
US4145806A
Expired / Lapsed
US
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Method of assembling an electrochemical cell
Assignee: Boeing North American Inc
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Filing: 1977-08-17
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Granted: 1979-03-27
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Expires: 1997-08-17
Abstract
Abstract A method of assembling a lithium alloy/molten salt/metal chalocogenide, high-energy density electrochemical device. Broadly, the method comprises providing a negative electrode structure in intimate contact with an electrolyte, which is conductive at elevated temperatures. There also is provided in contact with the electrolyte a positive electrode structure which includes a current-collecting substrate containing a sulfur and oxygen compound of at least one alkali metal in intimate admixture with a particulate metal. An electric current is passed from one electrode to the other to cause such device to be in a desired state of elecrochemical charge, whereby when said device is in a charged state a negative electrode active material comprises an alkali metal alloy and the positive electrode active material comprises a mixture of oxides and sulfides of the particulate metal.
Inventors
- 👤 San-Cheng Lai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:13
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/581; H01M10/00; H01M10/36; H01M10/39; H01M10/399; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
183 words
A method of assembling a high energy density electrochemical device comprising: (a) providing a negative electrode structure including a first metal which forms an alloy with an electronegative active material selected from the group consisting of alkali metals; (b) providing a body of electrolyte in contact with said negative electrode structure, said electrolyte comprising at least one alkali metal salt which is conductive at elevated temperatures, and wherein the alkali metal corresponds to the selected electronegative active material; (c) providing a positive electrode structure in said electrolyte and spaced from said negative electrode structure, said positive electrode structure including a current-collecting substrate containing a sulfur and oxygen compound of at least one alkali metal in intimate admixture with a particulate second metal; and (d) passing an electric current from one electrode to the other to cause said device to be in a desired state of electrochemical charge whereby when said device is in a charged state the negative electrode active material comprises an alkali metal alloy and the positive electrode active material comprises a mixture of oxides and sulfides of said second metal.
Claim 2
Independent Claim
183 words
A method of assembling a high energy density electrochemical device comprising: (a) providing a negative electrode structure including a first metal which forms an alloy with an electronegative active material selected from the group consisting of alkali metals; (b) providing a body of electrolyte in contact with said negative electrode structure, said electrolyte comprising at least one alkali metal salt which is conductive at elevated temperatures, and wherein the alkali metal corresponds to the selected electronegative active material; (c) providing a positive electrode structure in said electrolyte and spaced from said negative electrode structure, said positive electrode structure including a current-collecting substrate containing a sulfur and oxygen compound of at least one alkali metal in intimate admixture with a particulate second metal; and (d) passing an electric current from one electrode to the other to cause said device to be in a desired state of electrochemical charge whereby when said device is in a charged state the negative electrode active material comprises an alkali metal alloy and the positive electrode active material comprises a mixture of oxides and sulfides of said second metal.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said electronegative active material is lithium.
Claim 4
Dependent Claim
23 words
The method of claim 2 wherein said electrolyte comprises a mixture of a lithium halide and at least one other alkali metal halide.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein said particulate second metal is selected from the group consisting of iron, copper, nickel and combinations thereof.
Claim 6
Dependent Claim
19 words
The method of claim 1 wherein said first metal is selected from the group consisting of silicon and aluminum.
Claim 7
Dependent Claim
45 words
The method of claim 1 wherein said sulfur and oxygen compound of at least one alkali metal is selected from the group consisting of Na 2 S 2 O 3 , Li 2 S 2 O 3 and K 2 S 2 O 3 .
Claim 8
Dependent Claim
23 words
The method of claim 3 wherein said particulate second metal is selected from the group consisting of iron, copper nickel and combinations thereof.
Claim 9
Dependent Claim
19 words
The method of claim 7 wherein said first metal is selected from the group consisting of silicon and aluminum.
Claim 10
Dependent Claim
23 words
The method of claim 6 wherein said electrolyte comprises a mixture of a lithium halide and at least one other alkali metal halide.
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) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |