US4228227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rechargeable electrochemical cell
Assignee: Northrop Grumman Innovation Systems LLC
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Filing: 1979-08-13
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Granted: 1980-10-14
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Expires: 1999-08-13
Abstract
Abstract An electrolyte for use in rechargeable electrochemical cells having a lithium electrode and a depolarizer which includes an electrochemically active amount of LiAsF 6 dissolved in tetrahydrofuran and a rechargeability improving amount of LiI contained therein to form an electrolyte solution, said solution being capable of passing through a molecular sieve of less than 5 Angstroms. A preferred embodiment includes a 1 molar solution of the LiAsF 6 and from about 0.8 to 1.4 molar solution of LiI.
Inventors
- 👤 Deidrich J. Saathoff
- 👤 Hanumanthiyna V. Venkatasetty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:47
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/056; H01M10/0564; H01M10/0566; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
54 words
An electrolyte for use in rechargeable electrochemical cells having a lithium and a depolarizer, comprising: an electrochemically active amount of LiAsF 6 dissolved in tetrahydrofuran and a rechargeability improving amount of LiI contained therein to form an electrolyte solution, said solution being capable of passing through a molecular sieve on less than 5 Angstroms.
Claim 2
Dependent Claim
54 words
An electrolyte for use in rechargeable electrochemical cells having a lithium and a depolarizer, comprising: an electrochemically active amount of LiAsF 6 dissolved in tetrahydrofuran and a rechargeability improving amount of LiI contained therein to form an electrolyte solution, said solution being capable of passing through a molecular sieve on less than 5 Angstroms.
Claim 3
Dependent Claim
18 words
The cell of claim 1 wherein the amount of LiAsF 6 ranges from 0.2 molar to 2.0 molar.
Claim 4
Dependent Claim
16 words
The cell of claim 2 wherein the amount of LiAsF 6 range is approximately 1.0 molar.
Claim 5
Dependent Claim
16 words
The cell of claim 1 wherein the amount of LiI ranges from 0.1 to 0.35 molar.
Claim 6
Dependent Claim
16 words
The cell of claim 4 when the amount of LiI ranges from 0.8 to 1.4 molar.
References Cited (Backward Citations)
US3945848A
Cited
US3928067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |