US4710437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High rate metal oxyhalide cells
Assignee: Enersys Advanced Systems Inc
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Filing: 1986-01-13
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Granted: 1987-12-01
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Expires: 2006-01-13
Abstract
Abstract Improved catalysts for the reduction of oxyhalide depolarizers such as SOCl 2 and SO 2 Cl 2 in active-metal non-aqueous cells are provided which are easier to prepare and less expensive than phthalocyanine complexes and which are generally more stable in the cell environment. These catalysts include certain macrocyclic complexes of Schiff's base prepared by the reaction of an aldehyde with a primary diamine. The preferred embodiments include mononuclear metal macrocyclic complexes made from salicylaldehyde and o-phenylenediamine and binuclear metal macrocyclic complexes of 5-methyl isophthalaldehyde and 1,3-diaminopropane.
Inventors
- 👤 Narayan Doddapaneni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:49
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/663; H01M4/86; H01M4/90; H01M4/9008; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
In an non-aqueous electrochemical cell system having an active metal anode, a cathode and a non-aqueous electrolyte having an oxyhalide depolarizer, the improvement comprising: a catalyst for the reduction of said oxyhalide depolarizer comprising a metal complex of Schiff's base, said Schiff's base being selected from the group consisting of macrocyclic complexes of 5-methyl isophthalaldehyde and 1,3-diaminopropane wherein the metal in said metal complex is selected from the group consisting of iron and cobalt and wherein said metal complex is binuclear.
Claim 2
Dependent Claim
81 words
In an non-aqueous electrochemical cell system having an active metal anode, a cathode and a non-aqueous electrolyte having an oxyhalide depolarizer, the improvement comprising: a catalyst for the reduction of said oxyhalide depolarizer comprising a metal complex of Schiff's base, said Schiff's base being selected from the group consisting of macrocyclic complexes of 5-methyl isophthalaldehyde and 1,3-diaminopropane wherein the metal in said metal complex is selected from the group consisting of iron and cobalt and wherein said metal complex is binuclear.
Claim 3
Dependent Claim
10 words
The cell of claim 1 wherein said metal is cobalt.
Claim 4
Dependent Claim
10 words
The cell of claim 1 wherein said metal is iron.
Claim 5
Dependent Claim
86 words
In a non-aqueous electrochemical cell having a lithium anode, a carbon cathode and a non-aqueous electrolyte comprising LiAlCl 4 salt is SOCl 2 depolarizer solvent the improvement comprising: a catalyst for the reduction of said oxyhalide depolarizer comprising a metal complex of Schiff's base, said Schiff's base being selected from the group consisting of macrocyclic complexes of 5-methyl isophthalaldehyde and 1,3 diaminopropane wherein the metal in said metal complex is selected from the group consisting of iron and cobalt and wherein said metal complex is binuclear.
Claim 6
Dependent Claim
86 words
In a non-aqueous electrochemical cell having a lithium anode, a carbon cathode and a non-aqueous electrolyte comprising LiAlCl 4 salt is SOCl 2 depolarizer solvent the improvement comprising: a catalyst for the reduction of said oxyhalide depolarizer comprising a metal complex of Schiff's base, said Schiff's base being selected from the group consisting of macrocyclic complexes of 5-methyl isophthalaldehyde and 1,3 diaminopropane wherein the metal in said metal complex is selected from the group consisting of iron and cobalt and wherein said metal complex is binuclear.
Claim 7
Dependent Claim
10 words
The cell of claim 4 wherein said metal is cobalt.
Claim 8
Dependent Claim
10 words
The cell of claim 4 wherein said metal is iron.
References Cited (Backward Citations)
US3595702A
Cited
US4128702A
Cited
US4181779A
Cited
US4252875A
Cited
US4393125A
Cited
US4293623A
Cited
US4405693A
Cited
US4469763A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
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