US4091152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithium SO2 cell
Assignee: Duracell Inc USA
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Filing: 1975-10-17
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Granted: 1978-05-23
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Expires: 1995-10-17
Abstract
Abstract A method, a cell, an electrolyte and an additive for the non-dendritic deposition of lithium is described. The additive which causes the non-dendritic deposition of lithium from non-aqueous electrolytes and particularly organic electrolytes is a metal, reducible by lithium and capable of forming lithium-rich metallics or alloys.
Inventors
- 👤 M. L. Bhaskara Rao
- 👤 Carl R. Schlaikjer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:37
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/42; C25D3/56; H; H01; H01M; H01M10/00; H01M10/36; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
A rechargeable cell capable of plating non-dendritic lithium which comprises a sulfur dioxide cathode, a lithium anode, and an aprotic non-aqueous electrolyte, with said electrolyte comprising a non-aqueous solvent having dissolved therein a lithium salt and an addition agent comprising a metal salt which metal is reducible by lithium and capable of coplating therewith, and wherein the concentration of said addition agent does not exceed the amount which will render the plated lithium at least one and a half volts more noble than the normal lithium EMF activity.
Claim 2
Dependent Claim
88 words
A rechargeable cell capable of plating non-dendritic lithium which comprises a sulfur dioxide cathode, a lithium anode, and an aprotic non-aqueous electrolyte, with said electrolyte comprising a non-aqueous solvent having dissolved therein a lithium salt and an addition agent comprising a metal salt which metal is reducible by lithium and capable of coplating therewith, and wherein the concentration of said addition agent does not exceed the amount which will render the plated lithium at least one and a half volts more noble than the normal lithium EMF activity.
Claim 3
Dependent Claim
15 words
The cell according to claim 1 wherein said aprotic non-aqueous solvent is an organic solvent.
Claim 4
Dependent Claim
43 words
The cell according to claim 1 wherein said metal is selected from the group consisting of Be, Mg, Sr, Bu, Ca, Sc, Ti, Hg, Zn, Cd, Cr, Mn, Fe, Co, Ni, Cu, Y, Ag, Ga, In, Tl, Sn, Pb, Bi, and rare earths.
Claim 5
Dependent Claim
34 words
The cell according to claim 1 wherein said anode serves as the site for the deposition of non-dendritic lithium and comprises a lithium-rich intermetallic or alloy of lithium with a metal reducible by lithium.
Claim 6
Dependent Claim
39 words
The cell according to claim 1 wherein said addition agent is selected from the group consisting of calcium bromide (CaBr 2 ), zinc bromide (ZnBr 2 ), mercury (II) chloride (HgCl 2 ) and calcium chloride (CaCl 2 ).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |