US4076905A
Expired / Lapsed
US
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Electrode for electrical energy storage device
Assignee: Boeing North American Inc
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Filing: 1977-05-05
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Granted: 1978-02-28
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Expires: 1997-05-05
Abstract
Abstract An improved lithium electrode structure comprises an alloy of lithium, silicon, and boron in specified proportions and a supporting current-collecting matrix in intimate contact with said alloy. The lithium electrode of the present invention is utilized as the negative electrode in a rechargeable electrochemical cell.
Inventors
- 👤 Anthony F. Sammells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:32
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/13; H01M10/00; H01M10/36; H01M4/04; H01M4/0438; H01M4/0459; H01M4/0461; H01M4/36; H01M4/38; H01M4/40; H01M4/64; H01M4/70; H01M4/80; H01M4/806; H01M2004/026; H01M2004/027; H01M2300/00; H01M2300/0017; H01M2300/0025; H01M2300/0048; H01M4/0402; H01M4/0404; H01M4/0483; H01M4/0485; H01M4/405; H01M4/66; H01M4/661; H01M4/669; H01M4/76; H01M4/762; H01M4/808; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
79 words
An electrical energy storage device having positive and negative electrodes spaced from one another and in contact with a lithium-containing electrolyte, wherein the negative electrode is a composite electrode structure which comprises an alloy of lithium, silicon, and boron having the empirical formula Li x SiB y , where x has a value from 1 to 5 and y has a value from 0.1 to 3, and wherein a current-collecting matrix supporting said alloy is in intimate contact therewith.
Claim 2
Dependent Claim
79 words
An electrical energy storage device having positive and negative electrodes spaced from one another and in contact with a lithium-containing electrolyte, wherein the negative electrode is a composite electrode structure which comprises an alloy of lithium, silicon, and boron having the empirical formula Li x SiB y , where x has a value from 1 to 5 and y has a value from 0.1 to 3, and wherein a current-collecting matrix supporting said alloy is in intimate contact therewith.
Claim 3
Dependent Claim
26 words
The electrical energy storage device of claim 1, wherein x has a value from 4 to 5 and y has a value from 0.2 to 1.
Claim 4
Dependent Claim
20 words
The electrical energy storage device of claim 1, wherein said positive electrode contains a metal sulfide as the active material.
Claim 5
Dependent Claim
25 words
The electrical energy storage device of claim 1, wherein said electrolyte is a lithium-containing salt which is molten at the operating temperature of the device.
Claim 6
Dependent Claim
68 words
The electrical energy storage device of claim 1, wherein x a value from 4 to 5 and y has a value from 0.2 to 1, the positive electrode contains iron sulfide as its active material, and the lithium-containing electrolyte comprises a eutectic salt mixture of a lithium halide and at least one other alkali metal halide, said salt mixture being molten at the operating temperature of the device.
Claim 7
Dependent Claim
27 words
The electrical energy storage device of claim 4, wherein said lithium-containing electrolyte comprises a eutectic mixture of lithium halide and at least one other alkali metal halide.
Claim 8
Dependent Claim
64 words
A composite negative lithium electrode structure for an electrical energy storage device wherein said composite electrode structure comprises: an alloy of lithium, silicon, and boron having the empirical formula Li x SiB y , where x has a value from 1 to 5 and y has a value from 0.1 to 3, and a current-collecting matrix supporting said alloy and in intimate contact therewith.
Claim 9
Dependent Claim
64 words
A composite negative lithium electrode structure for an electrical energy storage device wherein said composite electrode structure comprises: an alloy of lithium, silicon, and boron having the empirical formula Li x SiB y , where x has a value from 1 to 5 and y has a value from 0.1 to 3, and a current-collecting matrix supporting said alloy and in intimate contact therewith.
Claim 10
Dependent Claim
24 words
The electrode structure of claim 1, wherein x has a value from 4 to 5 and y has a value from 0.2 to 1.0.
Claim 11
Dependent Claim
20 words
The electrode structure of claim 1, wherein the supporting current-collecting matrix comprises a cellular metal substrate impregnated with said alloy.
Claim 12
Dependent Claim
124 words
The electrode structure of claim 1, wherein the supporting current-collecting matrix comprises a unitary multi-cell structure, including: a plurality of wall members having edges and axially extending surfaces which form a plurality of cells having at least one open end and a cell cross-sectional open area of at least about 0.04 cm 2 , said edges of said wall members and the open end of said cells being aligned in a common plane to form a planar surface, the axially extending surfaces of said wall members being substantially perpendicular to said planar surface; said alloy being disposed in said cells; and an electrolyte-permeable member affixed to said wall members and covering the open end of said cells for retaining said alloy in said cells.
Claim 13
Dependent Claim
36 words
The electrode structure of claim 10, wherein said wall members are of metal and form a plurality of hexagonal cells, and said electrolyte-permeable member is a metal screen bonded to the edges of said wall members.
Claim 14
Dependent Claim
18 words
The electrode structure of claim 11 wherein said metal is selected from nickel, iron, steel, tantalum, and molybdenum.
References Cited (Backward Citations)
US3992222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |