US4520083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-aqueous electrochemical cell and electrolyte
Assignee: BP Corp North America Inc
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Filing: 1983-03-02
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Granted: 1985-05-28
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Expires: 2003-03-02
Abstract
Abstract Disclosed is an ambient temperature, rechargeable non-aqueous electrochemical cell having an active metal anode of the second kind, a cathode depolarizer, positive electrode current collector and an electrolyte comprising a solvent, a supporting electrolyte salt, and an active metal salt. Also disclosed is an electrolyte for non-aqueous active metal cells.
Inventors
- 👤 Keith B. Prater
- 👤 Robert J. Thrash
- 👤 John F. Connolly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:09
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/056; H01M10/36; H01M10/0564; H01M10/0566; H01M10/0569; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
147 words
A non-aqueous, rechargeable electrochemical cell comprising: (a) an active metal anode; (b) a positive electrode current collector; and (c) an electrolyte comprising a salt of said active metal, an ionizing solvent comprising sulfur dioxide, and a supporting electrolyte salt comprising at least one component of the general form R + X - , wherein R + is a cation different from the cation of said active metal, and X - is an anion which forms a salt with the cation of said active metal which is less soluble in said cell than R + X - ; wherein the saturated concentration of said active metal cation in said electrolyte is between about 10 -9 eq/l and about 10 -1 eq/l, and said electrolyte is substantially saturated with respect to the active metal cation, whereby an insoluble product is formed at the anode upon discharge of the cell.
Claim 2
Dependent Claim
147 words
A non-aqueous, rechargeable electrochemical cell comprising: (a) an active metal anode; (b) a positive electrode current collector; and (c) an electrolyte comprising a salt of said active metal, an ionizing solvent comprising sulfur dioxide, and a supporting electrolyte salt comprising at least one component of the general form R + X - , wherein R + is a cation different from the cation of said active metal, and X - is an anion which forms a salt with the cation of said active metal which is less soluble in said cell than R + X - ; wherein the saturated concentration of said active metal cation in said electrolyte is between about 10 -9 eq/l and about 10 -1 eq/l, and said electrolyte is substantially saturated with respect to the active metal cation, whereby an insoluble product is formed at the anode upon discharge of the cell.
Claim 3
Dependent Claim
26 words
The cell of claim 1 wherein said anode comprises at least one metal selected from the group consisting of lithium, sodium, potassium, beryllium, magnesium, and calcium.
Claim 4
Dependent Claim
99 words
The cell of claim 2 wherein said electrolyte comprises: (a) an ionizing solvent comprising sulfur dioxide; (b) a salt of said active metal having at least one cationic component comprising the cation of the active anode metal, and at least one anionic component comprising the anion of the supporting electrolyte salt; and (c) a supporting electrolyte salt wherein R + comprises at least one cation selected from the group consisting of metal ion complexes and nitrogen and phosphorus organic cations, and X - comprises at least one anion selected from the group consisting of anions of oxyhalides and oxyacids.
Claim 5
Dependent Claim
14 words
The cell of claim 3 wherein said ionizing solvent consists essentially of sulfur dioxide.
Claim 6
Dependent Claim
37 words
The cell of claim 3 wherein said active metal comprises lithium and said active metal salt comprises at least one compound selected from the group consisting of LiClO 4 and Li 2 S 2 O 4 .
Claim 7
Dependent Claim
57 words
The cell of claim 3 wherein R + comprises at least one material selected from the group of cations consisting of alkali metals complexed with crown ethers, alkali metals complexed with cryptands, transition metals complexed with ligands and chelates, transition metals complexed with chelating ligands, the cations of quaternary ammonium and phosphonium salts and N-hydrocarbo heterocyclic cations.
Claim 8
Dependent Claim
32 words
The cell of claim 6 wherein R + comprises at least one cation selected from the group consisting of Mn(2,2'-dipyridyl) 3 ++ , Mn(1,10-phenanthroline) 3 ++ and (n-butyl) 4 N + .
Claim 9
Dependent Claim
13 words
The cell of claim 6 wherein R + comprises Mn(2,2'-dipyridyl) 3 ++ .
Claim 10
Dependent Claim
13 words
The cell of claim 6 wherein R + comprises Mn(1,10-phenanthroline) 3 ++ .
Claim 11
Dependent Claim
14 words
The cell of claim 6 wherein R + comprises (n-butyl) 4 N + .
Claim 12
Dependent Claim
13 words
The cell of claim 6 wherein R + comprises a quaternary ammonium cation.
Claim 13
Dependent Claim
22 words
The cell of claim 6 wherein X - comprises at least one anion selected from the group consisting of perchlorate and dithionite.
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) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |