US4158723A
Expired / Lapsed
US
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High specific energy battery
Assignee: SAFT Societe des Accumulateurs Fixes et de Traction SA
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Filing: 1978-09-14
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Granted: 1979-06-19
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Expires: 1998-09-14
Abstract
Abstract A high specific energy electric cell having a lithium negative active material, an electrolyte solution of which the solvent is an aprotic liquid, and the positive active material is a derivative of divalent lead oxide, PbO. The lead oxide derivation is a compound of said PbO and an oxide selected from the group comprising the oxides of bismuth, Bi 2 O 3 , antimony, Sb 2 O 3 , and tin, SnO 2 .
Inventors
- 👤 Jean-Paul Gabano
- 👤 Michel Broussely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:05
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/56; H01M4/483; H01M6/00; H01M6/14; H01M6/16; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
An electric cell having lithium as a negative active material, an electrolyte solution of which the solvent is a aprotic liquid, and a positive active material derived from divalent lead oxide, PbO, wherein the improvement comprises: said derivative being a compound of PbO and an oxide selected from the group consisting of the oxides of bismuth, Bi 2 O 3 , antimony, Sb 2 O 3 , and tin SnO 2 .
Claim 2
Dependent Claim
72 words
An electric cell having lithium as a negative active material, an electrolyte solution of which the solvent is a aprotic liquid, and a positive active material derived from divalent lead oxide, PbO, wherein the improvement comprises: said derivative being a compound of PbO and an oxide selected from the group consisting of the oxides of bismuth, Bi 2 O 3 , antimony, Sb 2 O 3 , and tin SnO 2 .
Claim 3
Dependent Claim
22 words
An electric cell according to claim 1 wherein the positive active material comprises lead bismuthate, Pb 2 Bi 2 O 5 .
Claim 4
Dependent Claim
19 words
An electric cell according to claim 1 or 2 wherein the positive active material further comprises an electronic conductor.
Claim 5
Dependent Claim
14 words
An electric cell according to claim 3 wherein said electronic conductor is powdered lead.
Claim 6
Dependent Claim
33 words
An electric cell according to claim 1 or 2 wherein the solvent of said electrolyte is selected from the group comprising dioxolane, tetrahydrofuran, dimethoxyethane, dimethyl sulfite, propylene carbonate, ethylene carbonate, and their mixtures.
Claim 7
Dependent Claim
34 words
An electric cell according to claim 1 or 2 wherein the solute of said electrolyte solution is a lithium salt selected from the group comprising lithium perchlorate, lithium tetrafluoborate, lithium fluoromethylsulfonate, and lithium hexafluoroarsenate.
Claim 8
Dependent Claim
22 words
An electric cell according to claim 1 or 2 wherein the electrolyte is a 2 molar solution of lithium perchlorate in dioxolane.
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) | 1982-06-18 | 1982-12-18 | 1983-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-18 | 1986-12-18 | 1987-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-18 | 1990-12-18 | 1991-06-19 | $7700.00 | Window Closed / Lapsed |