US4223078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithium electric cell
Assignee: Alcatel Lucent SAS
•
Filing: 1979-03-26
•
Granted: 1980-09-16
•
Expires: 1999-03-26
Abstract
Abstract A lithium electric cell. Said electric cell includes a positive electrode (1) and a negative electrode (2) in contact with a liquid electrolyte impregnates in a separator (3). The positive electrode comprising an active compound whose general formula is Li x Fe 2 S z with x lying between 0 and 2, and z being not less than 3.
Inventors
- 👤 Michel Armand
- 👤 Raymond Brec
- 👤 Alain Le Mehaute
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:50
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/581; C; C01; C01P; C01P2002/00; C01P2002/70; C01P2002/72; C01P2006/00; C01P2006/40; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
55 words
A electric cell which includes a positive electrode and a negative electrode in contact with a liquid electrolyte, said positive electrode including an active ternary compound of lithium, iron and sulfur whose general formula is Li x Fe 2 S z with x being not more than 2, and z being not less than 3.
Claim 2
Dependent Claim
55 words
A electric cell which includes a positive electrode and a negative electrode in contact with a liquid electrolyte, said positive electrode including an active ternary compound of lithium, iron and sulfur whose general formula is Li x Fe 2 S z with x being not more than 2, and z being not less than 3.
Claim 3
Dependent Claim
19 words
An electric cell according to claim 1, wherein said active compound is Li 2 Fe 2 S z .
Claim 4
Dependent Claim
19 words
An electric cell according to claim 2, wherein said active compound is Li 2 Fe 2 S 3 .
Claim 5
Dependent Claim
26 words
An electric cell according to any of claim 1, claim 2 or claim 3, wherein said positive electrode further includes carbon, graphite, copper, nickel or iron.
Claim 6
Dependent Claim
20 words
An electric cell according to claim 1, claim 2 or claim 3, wherein the negative electrode comprises an alkali metal.
Claim 7
Dependent Claim
21 words
An electric cell according to claim 1, wherein said electrolyte includes an organic solvent in which a lithium salt is dissolved.
Claim 8
Dependent Claim
27 words
An electric cell according to claim 6, wherein said organic solvent is chosen from the group consisting of propylene carbonate, dioxolane, dimethyloxyethane, nitromethane, tetrahydrofurane and cyclic esters.
Claim 9
Dependent Claim
25 words
An electric cell according to claim 6, wherein that said salt is chosen from the group consisting of perchlorates, hexafluoroborates, hexafluoroarseniates, nitrates, sulphates and methylchlorosulfonates.
Claim 10
Dependent Claim
52 words
An electric cell according to claim 1, claim 2, or claim 3, wherein that the positive active compound is prepared by successively: mixing a carbonate of lithium and an oxide or iron; and heating the mixture to a temperature which lies between 200° and 1000° C. in a flow of inert gas;
Claim 11
Dependent Claim
27 words
An electric cell according to any of claim 1, claim 2 or claim 3, wherein said positive electrode further includes a transition element of the periodic table.
Claim 12
Dependent Claim
18 words
An electric cell according to claim 1, claim 2 or claim 3 wherein the negative electrode comprises lithium.
Claim 13
Dependent Claim
64 words
An electric cell according to claim 1, claim 2 or claim 3, wherein that the positive active compound is prepared by successively: mixing a carbonate of lithium and an oxide of iron; and heating the mixture to a temperature which lies between 200° and 1000° C. in a flow of inert gas, said inert gas being argon containing a compound of carbon and sulphur.
Claim 14
Dependent Claim
21 words
An electric cell according to claim 2, wherein said electrolyte includes an organic solvent in which a lithium salt is dissolved.
Claim 15
Dependent Claim
27 words
An electric cell according to claim 13, wherein said organic solvent is chosen from the group consisting of propylene carbonate, dioxolane, dimethyloxyethane, nitromethane, tetrahydrofurane and cyclic esters.
Claim 16
Dependent Claim
25 words
An electric cell according to claim 13, wherein that said salt is chosen from the group consisting of perchlorates, hexafluoroborates, hexafluoroarseniates, nitrates, sulphates and methylchlorosulfonates.
Claim 17
Dependent Claim
21 words
An electric cell according to claim 3, wherein said electrolyte includes an organic solvent in which a lithium salt is dissolved.
Claim 18
Dependent Claim
27 words
An electric cell according to claim 16, wherein said organic solvent is chosen from the group consisting of propylene carbonate, dioxolane, dimethyloxyethane, nitromethane, tetrahydrofurane and cyclic esters.
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) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |