US4877695A
Expired / Lapsed
US
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Non-aqueous electrochemical cell
Assignee: Dow Chemical Co
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Filing: 1988-11-01
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Granted: 1989-10-31
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Expires: 2008-11-01
Abstract
Abstract An electrochemical cell comprising an anode composed of a molten mixture of non-lithium alkali metals, a cathode comprising an electrically conductive carbonaceous material and an electrolyte comprising an electrolyte salt and a non-aqueous solvent.
Inventors
- 👤 Robert A. Cipriano
- 👤 R. Vernon Snelgrove
- 👤 Francis P. McCullough, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:45
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M4/00; H01M4/02; H01M4/13; H01M4/36; H01M4/38; H01M4/381; H01M2004/026; H01M2004/027; H01M2300/00; H01M2300/0017; H01M2300/0025; H01M2300/0065; H01M4/04; H01M4/0402; H01M4/0404; H01M6/00; H01M6/14; H01M6/16; H01M6/162; H01M6/166; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
63 words
A non-aqueous electrochemical cell comprising: an anode comprising a molten mixture of at least two elements selected from the group consisting of sodium, potassium, cesium and rubidium; a cathod comprising an electrically conductive carbonaceous material; and, a non-aqueous electrolyte comprising: (1) a solvent, and (2) an electrolyte salt selected from the group consisting of an alkali metal tetrafluoroborate and a tetraalkyl ammonium tetrafluoroborate.
Claim 2
Dependent Claim
63 words
A non-aqueous electrochemical cell comprising: an anode comprising a molten mixture of at least two elements selected from the group consisting of sodium, potassium, cesium and rubidium; a cathod comprising an electrically conductive carbonaceous material; and, a non-aqueous electrolyte comprising: (1) a solvent, and (2) an electrolyte salt selected from the group consisting of an alkali metal tetrafluoroborate and a tetraalkyl ammonium tetrafluoroborate.
Claim 3
Dependent Claim
16 words
The electrochemical cell of claim 1, wherein said anode comprises a mixture of sodium and potassium.
Claim 4
Dependent Claim
15 words
The electrochemical cell of claim 1, wherein said electrolyte comprises an alkali salt of tetrafluoroborate.
Claim 5
Dependent Claim
24 words
The electrochemical cell of claim 3, wherein said electrolyte salt comprises a compound selected from the group consisting of lithium tetrafluoroborate and sodium tetrafluoroborate.
Claim 6
Dependent Claim
14 words
The electrochemical call of claim 1, wherein said electrolyte salt comprises tetraalkyl ammonium tetrafluoroborate.
Claim 7
Dependent Claim
22 words
The electrochemical cell of claim 5, wherein said electrolyte salt is selected from the group consisting of tetraethylammonium tetrafluoroborate and tetrabutylammonium tetrafluoroborate.
Claim 8
Dependent Claim
26 words
The electrochemical cell of claim 1, wherein said solvent comprises compounds selected from the group consisting of ethylene carbonate, propylene carbonate, γ-butyrolactone, diglyme and mixtures thereof.
Claim 9
Dependent Claim
14 words
The electrochemical cell of claim 1, wherein said carbonaceous material comprises activated carbon fibers.
Claim 10
Dependent Claim
17 words
The electrochemical cell of claim 1, wherein said anode is supported on an electrically conductive metal substrate.
References Cited (Backward Citations)
US3870561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |