US4596752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical cell structures and materials therefor
Assignee: UK Secretary of State for Defence
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Filing: 1984-11-06
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Granted: 1986-06-24
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Expires: 2004-11-06
Abstract
Abstract An electrochemical cell system suitable for use in a thermal battery based on a cathode incorporating an active material consisting of a mixture of LiV 2 O 5 and VO 2 , is disclosed. The cathode material is intended primarily for use in cells with lithium or lithium alloy anodes and lithium halide electrolytes.
Inventors
- 👤 Ian Faul
- 👤 Andrew J. Golder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:45
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/485; C; C01; C01G; C01G31/00; C01G31/02; H01M4/483; H01M6/00; H01M6/30; H01M6/36; C01P; C01P2002/00; C01P2002/70; C01P2002/77; C01P2002/80; C01P2002/88; C01P2006/00; C01P2006/40; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
46 words
A thermal cell comprising a lithium anode, a molten salt electrolyte and an active cathode material which in the pre-discharge condition thereof is a mixture consisting essentially of a VO 2 ±z component and a Li y V 2 O 5 component wherein 0.88≦y≦1 and 0≦z≦0.05.
Claim 2
Dependent Claim
46 words
A thermal cell comprising a lithium anode, a molten salt electrolyte and an active cathode material which in the pre-discharge condition thereof is a mixture consisting essentially of a VO 2 ±z component and a Li y V 2 O 5 component wherein 0.88≦y≦1 and 0≦z≦0.05.
Claim 3
Dependent Claim
42 words
A thermal cell as claimed in claim 1 having an active cathode material which in the pre-discharge condition thereof is a mixture consisting essentially of a VO 2 ±z component and Li y V 2 O 5 component wherein y=1 and 0≦z≦0.01.
Claim 4
Dependent Claim
42 words
A thermal cell as claimed in claim 2 wherein the active cathode material comprises between one and three parts by weight of the VO 2 ±z component for every one part by weight of the Li y V 2 O 5 component.
Claim 5
Dependent Claim
24 words
A thermal cell as claimed in claim 3 wherein the Li y V 2 O 5 component is the gamma form of that composition.
Claim 6
Dependent Claim
23 words
A thermal cell as claimed in claim 3 wherein the active cathode material is present as a coating upon a conventional cathode material.
Claim 7
Dependent Claim
114 words
A thermal cell having a lithium metal or lithium alloy anode, an electrolyte which comprises at least one lithium salt and is contained in an inert binder, and a cathode which comprises an active cathode material in intimate admixture with an electrolyte material comprising at least one lithium salt; wherein the active cathode material, in the pre-discharge condition thereof, is a mixture consisting essentially of a VO 2 ±z component and a Li y V 2 O 5 component, the mixture comprising between one and three parts by weight of the VO 2 ±z component for every part by weight of the Li y V 2 O 5 component, y being 1 and 0≦l≦0.01.
Claim 8
Dependent Claim
114 words
A thermal cell having a lithium metal or lithium alloy anode, an electrolyte which comprises at least one lithium salt and is contained in an inert binder, and a cathode which comprises an active cathode material in intimate admixture with an electrolyte material comprising at least one lithium salt; wherein the active cathode material, in the pre-discharge condition thereof, is a mixture consisting essentially of a VO 2 ±z component and a Li y V 2 O 5 component, the mixture comprising between one and three parts by weight of the VO 2 ±z component for every part by weight of the Li y V 2 O 5 component, y being 1 and 0≦l≦0.01.
Claim 9
Dependent Claim
45 words
A thermal cell as claimed in claim 6 in which the electrolyte and the electrolyte material in the cathode are of the same formulation and wherein this comprises a eutectic mixture of 22 molar percent LiF, 31 molar percent LiCl and 47 molar percent LiBr.
Claim 10
Dependent Claim
31 words
A thermal cell as claimed in claim 7 in which the electrolyte material in the cathode comprises 25-35 percent by weight of the total of active cathode material and electrolyte therein.
Claim 11
Dependent Claim
20 words
A thermal cell as claimed in claim 6 in which the electrolyte comprises a eutectic mixture of LiCl and KCl.
Claim 12
Dependent Claim
34 words
A thermal cell as claimed in claim 9 in which the electrolyte material in the cathode comprises a eutectic mixture of 22 molar percent LiF, 31 molar percent LiCl and 47 molar percent LiBr.
References Cited (Backward Citations)
US4315059A
Cited
US4340652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-23 | 1989-12-23 | 1990-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-23 | 1993-12-23 | 1994-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-23 | 1997-12-23 | 1998-06-24 | $7700.00 | Window Closed / Lapsed |