US4091191A
Expired / Lapsed
US
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Battery having an electrode comprising mixtures of Al and TiS2
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1977-06-08
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Granted: 1978-05-23
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Expires: 1997-06-08
Abstract
Abstract An improved rechargeable, high energy density electrochemical cell comprises an anode, an electrolyte of an ionic salt dissolved in an aprotic organic solvent and a composite cathode structure of a cathode-active material and a metal, the metal being reactive with the cathode-active material to form on the metal an impervious conductive film of a mixture of compounds of the cathode-active material and the metal, which film remains impervious during both charging and discharging. A specific example includes a rechargeable, high energy density battery consisting of a lithium anode, an electrolyte of lithium perchlorate dissolved in dioxolane, and a cathode of titanium disulfide and aluminum.
Inventors
- 👤 Lewis H. Gaines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:50
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/581; H01M10/00; H01M10/05; H01M10/052; H01M4/13; H01M4/136; H01M10/054; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
134 words
A secondary electrochemical cell which comprises an alkali metal anode and a cathode immersed in an aprotic organic solvent having an alkali metal salt dissolved therein, the improvement which comprises: a composite cathode structure of a cathode-active material and a metal, wherein said cathode-active material consists essentially of at least one member selected from the group consisting of titanium disulfide, niobium trisulfide, titanium trisulfide, niobium triselenide, tantalum triselenide and tantalum trisulfide, and wherein said metal is at least one member selected from the group consisting of magnesium, aluminum, titanium, zinc, lead, iron, nickel and alloys thereof, said metal being reactive with the cathode-active material to form on the metal an impervious conductive film of a mixture of compounds of the cathode-active material and the metal which film remains impervious during both charging and discharging.
Claim 2
Dependent Claim
134 words
A secondary electrochemical cell which comprises an alkali metal anode and a cathode immersed in an aprotic organic solvent having an alkali metal salt dissolved therein, the improvement which comprises: a composite cathode structure of a cathode-active material and a metal, wherein said cathode-active material consists essentially of at least one member selected from the group consisting of titanium disulfide, niobium trisulfide, titanium trisulfide, niobium triselenide, tantalum triselenide and tantalum trisulfide, and wherein said metal is at least one member selected from the group consisting of magnesium, aluminum, titanium, zinc, lead, iron, nickel and alloys thereof, said metal being reactive with the cathode-active material to form on the metal an impervious conductive film of a mixture of compounds of the cathode-active material and the metal which film remains impervious during both charging and discharging.
Claim 3
Dependent Claim
21 words
The electrochemical cell as described in claim 1 wherein the cathode active material is titanium disulfide and the metal is aluminum.
Claim 4
Dependent Claim
22 words
The electrochemical cell as described in claim 2 wherein the aluminum is a perforated sheet upon which the titanium disulfide is pressed.
Claim 5
Dependent Claim
21 words
The electrochemical cell as described in claim 2 wherein the aluminum is a screen upon which the titanium disulfide is pressed.
Claim 6
Dependent Claim
19 words
The electrochemical cell described in claim 2 wherein the aluminum is particulate and is mixed with the titanium disulfide.
Claim 7
Dependent Claim
25 words
The electrochemical cell described in claim 5 wherein the particulate aluminum is added to the titanium disulfide in amounts up to about 50% by weight.
Claim 8
Dependent Claim
28 words
The electrochemical cell as described in claim 5 wherein the particulate aluminum is added to the titanium disulfide in an amount between about 5%, and 20%, by weight.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |