US4407910A
Expired / Lapsed
US
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Anode neutralization
Assignee: Altus Corp
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Filing: 1981-09-28
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Granted: 1983-10-04
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Expires: 2001-09-28
Abstract
Abstract An electrochemical cell having an alkali or alkaline metal anode, a cathode or current collector, an electrolyte and an anode neutralizing agent consisting of an inorganic solid positioned contiguous to and in intimate contact with the anode. Said neutralizing agent is nonreactive with all cell components below a predetermined temperature near the melting point of the anode. At or near the melting point of the anode, the agent and anode enter into endothermic or at most mildly exothermic reaction.
Inventors
- 👤 Vincent O. Catanzarite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:06
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M50/00; H01M50/40; H01M50/409; H01M50/431; H01M50/434; H01M50/44; H01M10/00; H01M10/42; H01M10/4235; H01M2200/00; H01M2200/10; H01M2300/00; H01M2300/0002; H01M2300/0014; H01M2300/0017; H01M2300/002; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
108 words
A method of preventing violent reaction in an electrochemical cell comprising an alkali metal anode material, cathode material and electrolyte consisting of a solute dissolved in an oxyhalide or thiohalide solvent comprising the step of placing a ceramic material contiguous to said anode material within said cell, said ceramic material being substantially inactive below a predetermined temperature whereby said ceramic material is capable of reacting at said predetermined temperature to form a product with said anode material, said product being substantially inactive and said reaction being at most mildly exothermic, wherein said ceramic material consists essentially of 95% Al 2 O 3 and 5% SiO 2 by weight.
Claim 2
Independent Claim
108 words
A method of preventing violent reaction in an electrochemical cell comprising an alkali metal anode material, cathode material and electrolyte consisting of a solute dissolved in an oxyhalide or thiohalide solvent comprising the step of placing a ceramic material contiguous to said anode material within said cell, said ceramic material being substantially inactive below a predetermined temperature whereby said ceramic material is capable of reacting at said predetermined temperature to form a product with said anode material, said product being substantially inactive and said reaction being at most mildly exothermic, wherein said ceramic material consists essentially of 95% Al 2 O 3 and 5% SiO 2 by weight.
Claim 3
Dependent Claim
17 words
A method according to claim 1 wherein said neutralizing agent is in intimate contact with said anode.
Claim 4
Dependent Claim
13 words
A method according to claim 1 wherein said cell contains a liquid oxyhalide.
Claim 5
Dependent Claim
44 words
A method according to claim 3 wherein said anode comprises an alloy of Li and at least one element of the group consisting of Na, K, Rb, Cs, Fr, Be, Ca, Mg, Ba, Sr, Ra, B, Al, Ga, In, Si, Ge, Sn and Pb.
Claim 6
Dependent Claim
11 words
A method according to claim 3 wherein said anode comprises lithium.
Claim 7
Dependent Claim
12 words
A method according to claim 3 wherein said oxyhalide is thionyl chloride.
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) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |