Patent US4263377A successfully refreshed from Google Patents.
US4263377A
Expired / Lapsed
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Cathodes for primary solid state lithium cells
Assignee: Duracell Inc USA
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Filing: 1980-03-10
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Granted: 1981-04-21
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Expires: 2000-03-10
Abstract
Abstract High energy density primary solid state cells using cathode materials of ionically and electronically conductive dischargeable compounds in combination with other non-conductive cathode active materials of higher energy density.
Inventors
- 👤 Ashok V. Joshi
- 👤 Charles C. Liang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:52
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/581; H01M4/5815; H01M4/362; H01M4/364; H01M6/00; H01M6/14; H01M6/18; H01M2004/026; H01M2004/028; H01M4/38
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
157 words
A method for increasing the realizable primary energy density of a room temperature operable primary solid state electrochemical cell having a lithium anode, a solid electrolyte comprised of a lithium salt and having a room temperature ionic conductivity in excess of 1×10 -9 ohm -1 cm -1 , and a solid cathode comprised of a non-conductive high energy density cathode active material selected from the group consisting of sulfur, selenium, tellurium, bromine and iodine, said method consisting essentially of the step of adding to said cathode active material a second material which is both electronically and ionically conductive and which second material is also cathode active, said second material consisting of one or more metal chalcogenides having electronic and ionic conductivities ranging between 10 -10 and 10 2 ohm -1 cm -1 , whereby said cathode is substantially devoid of other electronic conductive materials and whereby said cathode contains less than 10% of other ionic conductive materials.
Claim 2
Independent Claim
157 words
A method for increasing the realizable primary energy density of a room temperature operable primary solid state electrochemical cell having a lithium anode, a solid electrolyte comprised of a lithium salt and having a room temperature ionic conductivity in excess of 1×10 -9 ohm -1 cm -1 , and a solid cathode comprised of a non-conductive high energy density cathode active material selected from the group consisting of sulfur, selenium, tellurium, bromine and iodine, said method consisting essentially of the step of adding to said cathode active material a second material which is both electronically and ionically conductive and which second material is also cathode active, said second material consisting of one or more metal chalcogenides having electronic and ionic conductivities ranging between 10 -10 and 10 2 ohm -1 cm -1 , whereby said cathode is substantially devoid of other electronic conductive materials and whereby said cathode contains less than 10% of other ionic conductive materials.
Claim 3
Dependent Claim
122 words
The method of claim 10 wherein said one or more metal chalcogenides is selected from the group consisting of CoTe 2 , Cr 2 S 3 , HfS 2 , HfSe 2 , HfTe 2 , IrTe 2 , MoS 2 , MoSe 2 , MoTe 2 , NbS 2 , NbSe 2 , NbTe 2 , NiTe 2 , PtS 2 , PtSe 2 , PtTe 2 , SnS 2 , SnSSe, SnSe 2 , TaS 2 , TaSe 2 , TaTe 2 , TiS 2 , TiSe 2 , TiTe 2 , VS 2 , VSe 2 , VTe 2 , WS 2 , WSe 2 , Wte 2 , ZrS 2 , ZrSe 2 , and ZrTe 2 .
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein said metal chalcogenide is TiS 2 .
Claim 5
Dependent Claim
15 words
The method of claim 3 wherein said high energy density cathode active material is sulfur.
Claim 6
Dependent Claim
20 words
The method of claim 4 wherein said cathode consists of said cathode active materials without said other ionic conductive materials.
Claim 7
Dependent Claim
19 words
The method of claim 5 wherein said TiS 2 and said sulfur are admixed in a 1:1 mole ratio.
Claim 8
Dependent Claim
12 words
The method of claim 6 wherein said lithium salt is lithium iodide.
Claim 9
Dependent Claim
11 words
A cell made in accordance with the method of claim 1.
Claim 10
Dependent Claim
11 words
A cell made in accordance with the method of claim 2.
Claim 11
Dependent Claim
11 words
A cell made in accordance with the method of claim 3.
Claim 12
Dependent Claim
11 words
A cell made in accordance with the method of claim 4.
Claim 13
Dependent Claim
11 words
A cell made in accordance with the method of claim 5.
Claim 14
Dependent Claim
11 words
A cell made in accordance with the method of claim 6.
Claim 15
Dependent Claim
11 words
A cell made in accordance with the method of claim 7.
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) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |