US4698283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical cell having improved active life
Assignee: Enersys Advanced Systems Inc
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Filing: 1986-09-25
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Granted: 1987-10-06
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Expires: 2006-09-25
Abstract
Abstract Anode passivation and premature cell failure associated with anode deterioration due to corrosion has been greatly reduced in Li/SOCl 2 cells by the addition of small amounts of tetracarboxylated metal macrocyclic complexes such as cobalt tetracarboxylated phenylporphyrin (CoTCPP) or cobalt tetracarboxylated phthalocyanine (CoTCPC) to the electrolyte.
Inventors
- 👤 Narayan Doddapaneni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:04
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; H01M4/9008; H01M6/00; H01M6/14; H01M6/30; H01M6/36; H01M6/38; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
49 words
In an electrochemical cell having an active metal anode, an electrolyte solution comprising an oxychloride solvent depolarizer containing a metal salt of the anode and a cathode, the improvement comprising an amount of additive in said electrolyte selected from the group consisting of CoTCPP and CoTCPC and mixtures thereof.
Claim 2
Dependent Claim
49 words
In an electrochemical cell having an active metal anode, an electrolyte solution comprising an oxychloride solvent depolarizer containing a metal salt of the anode and a cathode, the improvement comprising an amount of additive in said electrolyte selected from the group consisting of CoTCPP and CoTCPC and mixtures thereof.
Claim 3
Dependent Claim
47 words
In an electrochemical cell having a lithium anode, an electrolyte solution comprising an amount of LiAlCl 4 salt in SOCl 2 solvent depolarizer, and a cathode comprising carbon, the improvement comprising an amount of additive in said electrolyte selected from the group consisting of CoTCPP and CoTCPC.
Claim 4
Dependent Claim
47 words
In an electrochemical cell having a lithium anode, an electrolyte solution comprising an amount of LiAlCl 4 salt in SOCl 2 solvent depolarizer, and a cathode comprising carbon, the improvement comprising an amount of additive in said electrolyte selected from the group consisting of CoTCPP and CoTCPC.
Claim 5
Dependent Claim
15 words
The cell of claim 2 wherein said cathode contains an amount of (CoPC) n .
Claim 6
Dependent Claim
16 words
The cell of claim 2 further comprising an amount of SO 2 in said electrolyte solution.
Claim 7
Dependent Claim
16 words
The cell of claim 3 further comprising an amount of SO 2 in said electrolyte solution.
Claim 8
Dependent Claim
10 words
The cell of claim 3 wherein said additive is CoTCPP.
Claim 9
Dependent Claim
10 words
The cell of claim 5 wherein said additive is CoTCPP.
Claim 10
Dependent Claim
45 words
In an electrochemical cell having a lithium anode, an electrolyte solution comprising an amount of LiAlCl 4 salt and an amount of SO 2 in SOCl 2 solvent depolarizer, and a cathode comprising carbon, the improvement comprising an amount of CoTCPP in said electrolyte solution.
Claim 11
Dependent Claim
45 words
In an electrochemical cell having a lithium anode, an electrolyte solution comprising an amount of LiAlCl 4 salt and an amount of SO 2 in SOCl 2 solvent depolarizer, and a cathode comprising carbon, the improvement comprising an amount of CoTCPP in said electrolyte solution.
Claim 12
Dependent Claim
22 words
The cell of claim 8 wherein the concentration of said SO 2 is substantially equal to that of the LiAlCl 4 .
Claim 13
Dependent Claim
14 words
The cell of claim 9 wherein the concentration of LiAlCl 4 is approximately 1.4M.
Claim 14
Dependent Claim
19 words
The cell of claim 8 wherein the concentration of said CoTCPP is from 0.01 to 0.1 mg/cc of electrolyte.
Claim 15
Dependent Claim
19 words
The cell of claim 9 wherein the concentration of said CoTCPP is from 0.01 to 0.1 mg/cc of electrolyte.
Claim 16
Dependent Claim
19 words
The cell of claim 10 wherein the concentration of said CoTCPP is from 0.01 to 0.1 mg/cc of electrolyte.
Claim 17
Dependent Claim
16 words
The cell of claim 13 wherein the concentration of said CoTCPP is 0.05 mg/cc of electrolyte.
Claim 18
Dependent Claim
15 words
The cell of claim 8 wherein said cathode contains an amount of (CoPC) n .
Claim 19
Dependent Claim
15 words
The cell of claim 9 wherein said cathode contains an amount of (CoPC) n .
Claim 20
Dependent Claim
15 words
The cell of claim 10 wherein said cathode contains an amount of (CoPC) n .
Claim 21
Dependent Claim
15 words
The cell of claim 11 wherein said cathode contains an amount of (CoPC) n .
Claim 22
Dependent Claim
15 words
The cell of claim 12 wherein said cathode contains an amount of (CoPC) n .
Claim 23
Dependent Claim
15 words
The cell of claim 13 wherein said cathode contains an amount of (CoPC) n .
Claim 24
Dependent Claim
15 words
The cell of claim 14 wherein said cathode contains an amount of (CoPC) n .
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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) | 1990-10-05 | 1991-04-06 | 1991-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-05 | 1995-04-06 | 1995-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-05 | 1999-04-06 | 1999-10-06 | $7700.00 | Window Closed / Lapsed |