US4002492A
Expired / Lapsed
US
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Rechargeable lithium-aluminum anode
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1975-07-01
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Granted: 1977-01-11
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Expires: 1995-07-01
Abstract
Abstract A high energy density electrochemical cell comprises an anode consisting essentially between about 63% and 92% lithium, on an atomic basis, and the balance essentially aluminum, a cathode and a nonaqueous electrolyte. Advantageously, the cathode is an electrochemically active transition metal chalcogenide, such as titanium disulfide, and the nonaqueous electrolyte is an organic solvent, such as dioxolane, having at least one lithium salt, preferably lithium perchlorate, dissolved therein.
Inventors
- 👤 Bhaskara M. L. Rao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:17
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M4/00; H01M4/02; H01M4/36; H01M4/38; H01M4/40; H01M4/58; H01M4/581; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
49 words
An improved high energy density electrochemical cell for operation at temperatures below about 150° C which comprises an anode consisting essentially of between about 63 and 92% lithium and the balance essentially aluminum, a cathode and a nonaqueous electrolyte of an organic solvent having a lithium salt dissolved therein.
Claim 2
Dependent Claim
49 words
An improved high energy density electrochemical cell for operation at temperatures below about 150° C which comprises an anode consisting essentially of between about 63 and 92% lithium and the balance essentially aluminum, a cathode and a nonaqueous electrolyte of an organic solvent having a lithium salt dissolved therein.
Claim 3
Dependent Claim
19 words
The cell as described in claim 1 wherein the cathode is made of an electrochemically active transition metal chalcogenide.
Claim 4
Dependent Claim
17 words
The cell as described in claim 1 wherein the cathode is made of electrochemically active titanium disulfide.
Claim 5
Dependent Claim
12 words
The cell as described in claim 1 wherein the electrolyte is dioxolane.
Claim 6
Dependent Claim
29 words
The cell as described in claim 1 wherein the electrolyte is lithium perchlorate dissolved in an organic solvent that is substantially inert to both the anode and the cathode.
Claim 7
Dependent Claim
16 words
The cell as described in claim 3 wherein the electrolyte comprises lithium perchlorate dissolved in dioxolane.
Claim 8
Dependent Claim
17 words
The cell as described in claim 1 wherein the anode contains between about 75 and 90% lithium.
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) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |