US4997730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonaqueous electrochemical cell and a method of manufacturing the same
Assignee: Panasonic Holdings Corp
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Filing: 1990-01-24
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Granted: 1991-03-05
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Expires: 2010-01-24
Abstract
Abstract The invention relates to a nonaqueous electrochemical cell comprising an alkali metal anode, an oxyhalide or other cathode-electrolyte solvent which is liquid at ambient temperature, and a porous carbonaceous cathode collector, the cathode-electrolyte containing at least polyethylene terephthalate as an additive for minimizing the voltage delay, i.e. a large voltage drop in an initial stage of discharge.
Inventors
- 👤 Kenichi Morigaki
- 👤 Shigeo Kobayashi
- 👤 Hiroshi Fukuda
- 👤 Shuichi Nishino
- 👤 Tomokazu Mitamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:53
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/62; H01M4/621; H01M4/64; H01M4/66; H01M4/663; H01M50/00; H01M50/40; H01M50/409; H01M50/431; H01M50/434; H01M50/437; H01M50/44; H01M6/00; H01M6/14; H01M2300/00; H01M2300/0017; Y; Y02; Y02P; Y02P70/00; Y02P70/50; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/49115
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
34 words
A nonaqueous electrochemical cell comprising an alkali metal anode, a glass fiber separator, a liquid cathode-electrolyte and a porous carbonaceous cathode collector, said liquid cathode-electrolyte containing 0.01 to 3.0 weight percent of polyethylene terephthalate.
Claim 2
Dependent Claim
34 words
A nonaqueous electrochemical cell comprising an alkali metal anode, a glass fiber separator, a liquid cathode-electrolyte and a porous carbonaceous cathode collector, said liquid cathode-electrolyte containing 0.01 to 3.0 weight percent of polyethylene terephthalate.
Claim 3
Dependent Claim
33 words
The nonaqueous electrochemical cell according to claim 1 wherein said liquid cathode-electrolyte contains 0.01 to 0.5 weight percent of polyvinyl chloride in addition to 0.01 to 3.0 weight percent of said polyethylene terephthalate.
Claim 4
Dependent Claim
43 words
A nonaqueous electrochemical cell comprising an alkali metal anode, a glass fiber separator, a liquid cathode-electrolyte, and a porous carbonaceous cathode collector, said glass fiber separator containing, as binders, polyethylene terephthalate and an acrylic resin in a weight ratio of 1:0.5 through 1.5.
Claim 5
Dependent Claim
43 words
A nonaqueous electrochemical cell comprising an alkali metal anode, a glass fiber separator, a liquid cathode-electrolyte, and a porous carbonaceous cathode collector, said glass fiber separator containing, as binders, polyethylene terephthalate and an acrylic resin in a weight ratio of 1:0.5 through 1.5.
Claim 6
Dependent Claim
21 words
The nonaqueous electrochemical cell according to claim 3 wherein said liquid cathode-electrolyte contains 0.01 to 0.5 weight percent of polyvinyl chloride.
Claim 7
Dependent Claim
57 words
A nonaqueous electrochemical cell comprising an alkali metal anode, a glass fiber separator, a liquid cathode-electrolyte, and a porous carbonaceous cathode collector, said porous carbonaceous cathode collector containing, as binders, polyethylene terephthalate and polytetrafluoroethylene in proportions of 1 to 10 weight percent and 5 to 20 weight percent, respectively, based on the total weight of the cathode.
Claim 8
Dependent Claim
57 words
A nonaqueous electrochemical cell comprising an alkali metal anode, a glass fiber separator, a liquid cathode-electrolyte, and a porous carbonaceous cathode collector, said porous carbonaceous cathode collector containing, as binders, polyethylene terephthalate and polytetrafluoroethylene in proportions of 1 to 10 weight percent and 5 to 20 weight percent, respectively, based on the total weight of the cathode.
Claim 9
Dependent Claim
21 words
The nonaqueous electrochemical cell according to claim 5 wherein said liquid cathode-electrolyte contains 0.01 to 0.5 weight percent of polyvinyl chloride.
Claim 10
Independent Claim
44 words
A method of manufacturing a nonaqueous electrochemical cell consisting generally of an alkali metal anode, a glass fiber separator, a liquid cathode-electrolyte, and a porous carbonaceous cathode collector, which comprises incorporating 1 to 30 g/m 2 of polyethylene terephthalate in said glass fiber separator.
Claim 11
Independent Claim
44 words
A method of manufacturing a nonaqueous electrochemical cell consisting generally of an alkali metal anode, a glass fiber separator, a liquid cathode-electrolyte, and a porous carbonaceous cathode collector, which comprises incorporating 1 to 30 g/m 2 of polyethylene terephthalate in said glass fiber separator.
Claim 12
Independent Claim
55 words
A method of manufacturing a nonaqueous electrochemical cell consisting generally of an alkali metal anode, a glass fiber separator, a liquid cathode-electrolyte, and a porous carbonaceous cathode collector, which comprises incorporating polyethylene terephthalate in said porous carbonaceous cathode collector in a proportion of 1 to 10 weight percent of the total weight of the cathode.
Claim 13
Independent Claim
55 words
A method of manufacturing a nonaqueous electrochemical cell consisting generally of an alkali metal anode, a glass fiber separator, a liquid cathode-electrolyte, and a porous carbonaceous cathode collector, which comprises incorporating polyethylene terephthalate in said porous carbonaceous cathode collector in a proportion of 1 to 10 weight percent of the total weight of the cathode.
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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) | 1994-03-04 | 1994-09-03 | 1995-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-04 | 1998-09-03 | 1999-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-04 | 2002-09-03 | 2003-03-05 | $7700.00 | Window Closed / Lapsed |