US4975346A
Expired / Lapsed
US
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Rechargeable electrochemical battery including a lithium anode
Assignee: Individual
•
Filing: 1989-05-26
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Granted: 1990-12-04
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Expires: 2009-05-26
Abstract
Abstract A rechargeable electrochemical battery including a lithium anode. A rechargeable electrochemical battery wherein the anode 2 is a lithium base and the electrolyte is composed of a solution of a lithium salt in a non-aqueous solvent. The active material of cathode 1 is a manganese dioxide containing lithium ions and displaying the crystallographic structure of α manganese dioxide known as cryptomelane.
Inventors
- 👤 Andre Lecerf
- 👤 Francis Lubin
- 👤 Michel Broussely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:22
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/056; H01M10/0564; H01M10/0566; H01M10/0568; H01M4/00; H01M4/02; H01M4/13; H01M4/131; H01M4/134; H01M4/139; H01M4/1391; H01M4/36; H01M4/48; H01M4/50; H01M4/505; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
76 words
A rechargeable electrochemical cell having an anode that is made of lithium or of a lithium alloy and an electrolyte that is composed of a solution of a lithium salt in a non-aqueous solvent, wherein the improvement comprises the cell having a cathode material that is a manganese oxide containing lithium ions and displaying the crystallographic structure of the α manganese dioxide known as cryptomelane, said cathode material containing essentially no other form of manganese oxide.
Claim 2
Dependent Claim
76 words
A rechargeable electrochemical cell having an anode that is made of lithium or of a lithium alloy and an electrolyte that is composed of a solution of a lithium salt in a non-aqueous solvent, wherein the improvement comprises the cell having a cathode material that is a manganese oxide containing lithium ions and displaying the crystallographic structure of the α manganese dioxide known as cryptomelane, said cathode material containing essentially no other form of manganese oxide.
Claim 3
Dependent Claim
26 words
An electrochemical cell as claimed in claim 1, wherein in said cathode material, the atomic ratio Li/Mn is in the range from 0.1 to 0.5 inclusive.
Claim 4
Dependent Claim
61 words
An electrochemical cell as claimed in claim 1 or claim 2, wherein said non-aqueous electrolyte is composed of a solvent selected from the group consisting of linear ethers, cyclic ethers, and esters of mixtures thereof and a solute selected from the group consisting of LiAsF 6 , LiCF 3 SO 3 , LiPF 6 , LiClO 4 , and mixtures thereof.
Claim 5
Dependent Claim
26 words
An electrochemical cell as claimed in claim 3, wherein the electrolyte is a solution of LiAsF 6 in a mixture of propylene carbonate and ethylene carbonate.
Claim 6
Dependent Claim
27 words
An electrochemical cell as claimed in claim 3, wherein the electrolyte is a solution of LiAsF 6 in a mixture of propylene carbonate, ethylene carbonate and dimethoxyethane.
References Cited (Backward Citations)
US4740433A
Cited
US4758484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-03 | 1994-06-04 | 1994-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-03 | 1998-06-04 | 1998-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-03 | 2002-06-04 | 2002-12-04 | $7700.00 | Window Closed / Lapsed |