US4281048A
Expired / Lapsed
US
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Battery cathode and method of making same
Assignee: BRITISH COLUMBIA DEVELOPMENT Corp 272 - 200 GRANVILL STREET VANCOUVER BRITISH COLUMBIA
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Filing: 1979-08-30
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Granted: 1981-07-28
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Expires: 1999-08-30
Abstract
Abstract A battery cathode comprising MoO 2 or MoS 2 particles coated with MoO 2 and methods of making same are disclosed.
Inventors
- 👤 Rudolph R. Haering
- 👤 James A. R. Stiles
- 👤 Klaus Brandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:43
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; C; C01; C01G; C01G39/00; C01G39/02; C01P; C01P2004/00; C01P2004/30; C01P2004/40; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/40; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
113 words
A method of making a battery cathode having a predominantly molybdenum dioxide cathode-active material, said method comprising the steps of: (a) baking finely divided molybdenum disulphide particles in an oxygen-containing atmosphere to convert substantially all of the molybdenum disulphide particles to finely divided molybdenum trioxide particles; (b) further baking the molybdenum trioxide particles in a reducing atmosphere to convert substantially all of the molybdenum trioxide particles to finely divided molybdenum dioxide particles; (c) applying a suspension of said molybdenum dioxide particles in a viscous liquid as a film on a selected substrate; and (d) baking the substrate and applied film in an inert atmosphere to drive off substantially all of the viscous liquid.
Claim 2
Independent Claim
113 words
A method of making a battery cathode having a predominantly molybdenum dioxide cathode-active material, said method comprising the steps of: (a) baking finely divided molybdenum disulphide particles in an oxygen-containing atmosphere to convert substantially all of the molybdenum disulphide particles to finely divided molybdenum trioxide particles; (b) further baking the molybdenum trioxide particles in a reducing atmosphere to convert substantially all of the molybdenum trioxide particles to finely divided molybdenum dioxide particles; (c) applying a suspension of said molybdenum dioxide particles in a viscous liquid as a film on a selected substrate; and (d) baking the substrate and applied film in an inert atmosphere to drive off substantially all of the viscous liquid.
Claim 3
Independent Claim
84 words
A method of making a battery cathode having a cathode-active material which comprises molybdenum dioxide, said method comprising the steps of: (a) baking finely divided molybdenum disulphide particles in an oxygen-containing atmosphere to convert a selected proportion of the molybdenum disulphide to molybdenum dioxide; (b) applying a suspension of the converted particles in a viscous liquid as a film on a selected substrate; and (c) baking the substrate and applied film in an inert atmosphere to drive off substantially all of the viscous liquid.
Claim 4
Independent Claim
84 words
A method of making a battery cathode having a cathode-active material which comprises molybdenum dioxide, said method comprising the steps of: (a) baking finely divided molybdenum disulphide particles in an oxygen-containing atmosphere to convert a selected proportion of the molybdenum disulphide to molybdenum dioxide; (b) applying a suspension of the converted particles in a viscous liquid as a film on a selected substrate; and (c) baking the substrate and applied film in an inert atmosphere to drive off substantially all of the viscous liquid.
Claim 5
Independent Claim
89 words
A method of making a battery cathode having a cathode-active material of substantially all molybdenum dioxide, said method comprising the steps of: (a) applying a suspension of finely divided molybdenum disulphide particles in a viscous liquid as a film on a selected substrate; (b) baking the substrate and applied film in an inert atmosphere to drive off substantially all of the viscous liquid; and (c) baking the substrate and applied film in an oxygen-containing atmosphere to convert substantially all of the molybdenum disulphide to molybdenum dioxide coating said substrate.
Claim 6
Independent Claim
89 words
A method of making a battery cathode having a cathode-active material of substantially all molybdenum dioxide, said method comprising the steps of: (a) applying a suspension of finely divided molybdenum disulphide particles in a viscous liquid as a film on a selected substrate; (b) baking the substrate and applied film in an inert atmosphere to drive off substantially all of the viscous liquid; and (c) baking the substrate and applied film in an oxygen-containing atmosphere to convert substantially all of the molybdenum disulphide to molybdenum dioxide coating said substrate.
Claim 7
Independent Claim
92 words
A method of making a battery cathode having a cathode-active material of substantially all molybdenum dioxide, said method comprising the steps of: (a) applying a suspension of finely divided molybdenum disulphide particles in a viscous liquid as a film on a selected substrate; (b) baking the substrate and applied film in an oxygen containing atmosphere to convert substantially all of the molybdenum disulphide to molybdenum trioxide; and (c) baking the substrate and applied film in a reducing atmosphere to convert substantially all of the molybdenum trioxide to molybdenum dioxide coating said substrate.
Claim 8
Independent Claim
92 words
A method of making a battery cathode having a cathode-active material of substantially all molybdenum dioxide, said method comprising the steps of: (a) applying a suspension of finely divided molybdenum disulphide particles in a viscous liquid as a film on a selected substrate; (b) baking the substrate and applied film in an oxygen containing atmosphere to convert substantially all of the molybdenum disulphide to molybdenum trioxide; and (c) baking the substrate and applied film in a reducing atmosphere to convert substantially all of the molybdenum trioxide to molybdenum dioxide coating said substrate.
Claim 9
Independent Claim
116 words
A method of making a battery cathode having a cathode active material at least a portion of which material is molybdenum dioxide, said method comprising the steps of: (a) applying a suspension of finely divided molybdenum disulphide particles in a viscous liquid as a film on a selected substrate; (b) baking the substrate and applied film in an inert atmosphere to drive off substantially all of the viscous liquid; and (c) baking the substrate and applied film in an oxygen-containing atmosphere to convert molybdenum disulphide to molybdenum dioxide such that the cathode-active material consists essentially of molybdenum disulphide and molybdenum dioxide, the mole percentage of molybdenum dioxide being greater than the mole percentage of molybdenum disulphide.
Claim 10
Independent Claim
116 words
A method of making a battery cathode having a cathode active material at least a portion of which material is molybdenum dioxide, said method comprising the steps of: (a) applying a suspension of finely divided molybdenum disulphide particles in a viscous liquid as a film on a selected substrate; (b) baking the substrate and applied film in an inert atmosphere to drive off substantially all of the viscous liquid; and (c) baking the substrate and applied film in an oxygen-containing atmosphere to convert molybdenum disulphide to molybdenum dioxide such that the cathode-active material consists essentially of molybdenum disulphide and molybdenum dioxide, the mole percentage of molybdenum dioxide being greater than the mole percentage of molybdenum disulphide.
Claim 11
Dependent Claim
26 words
A method as defined in claim 5, wherein the mole percentage of molybdenum disulphide is relatively small in relation to the mole percentage of molybdenum dioxide.
Claim 12
Dependent Claim
86 words
A battery cathode, comprising: (a) a substrate; and (b) a cathode-active material consisting essentially of molybdenum disulphide and molybdenum dioxide formed on the substrate by applying a suspension of finely divided molybdenum disulphide particles in a viscous liquid as a film on the substrate, then baking the substrate and applied film in an oxygen-containing atmosphere to convert a selected proportion of the molybdenum disulphide to molybdenum dioxide; wherein the mole percentage of molybdenum disulphide is relatively small in relation to the mole percentage of molybdenum dioxide.
Claim 13
Dependent Claim
86 words
A battery cathode, comprising: (a) a substrate; and (b) a cathode-active material consisting essentially of molybdenum disulphide and molybdenum dioxide formed on the substrate by applying a suspension of finely divided molybdenum disulphide particles in a viscous liquid as a film on the substrate, then baking the substrate and applied film in an oxygen-containing atmosphere to convert a selected proportion of the molybdenum disulphide to molybdenum dioxide; wherein the mole percentage of molybdenum disulphide is relatively small in relation to the mole percentage of molybdenum dioxide.
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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) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |