US4391729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal oxide composite cathode material for high energy density batteries
Assignee: Greatbatch Ltd
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Filing: 1980-06-30
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Granted: 1983-07-05
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Expires: 2000-06-30
Abstract
Abstract An electrochemical cell incorporating cathode materials comprising at least one metal oxide, at least one metal, or mixture of metals or metal oxides incorporated in the matrix of a host metal oxide. The cathode materials of this invention are constructed by the chemical addition, reaction, or otherwise intimate contact of various metal oxides and/or metal elements during thermal treatment in mixed states. The materials thereby produced contain metals and oxides of the groups IB, IIB, IIIB, IVB, VB, VIB, VIIB, and VIII, which includes the noble metals and/or their oxide compounds. The incorporation of the metal oxides, metals or mixtures thereof substantially increases the discharge capacity and the overall performance of the cathode materials.
Inventors
- 👤 Charles C. Liang
- 👤 M. Elizabeth Bolster
- 👤 Robert M. Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:17
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/485; H01M4/54; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
78 words
A method of making a composite cathode comprising at least one metal oxide, metal or mixtures of metals and metal oxides in the matrix of a host metal oxide which comprises: thermally treating by heating above decomposition temperature a mixture of a host metal oxide and a thermally decomposable metal compound of a metal selected from the group consisting of Groups IB, IIB, IIIB, IVB, VB, VIB, VIIB and VIII, and forming the resultant mass into said cathode.
Claim 2
Independent Claim
78 words
A method of making a composite cathode comprising at least one metal oxide, metal or mixtures of metals and metal oxides in the matrix of a host metal oxide which comprises: thermally treating by heating above decomposition temperature a mixture of a host metal oxide and a thermally decomposable metal compound of a metal selected from the group consisting of Groups IB, IIB, IIIB, IVB, VB, VIB, VIIB and VIII, and forming the resultant mass into said cathode.
Claim 3
Dependent Claim
17 words
A method of claim 1, wherein thermal treatment is for a period of at least 24 hours.
Claim 4
Dependent Claim
14 words
A method of claim 1, wherein the decomposable metal compound is a metal oxide.
Claim 5
Dependent Claim
14 words
A method of claim 3, wherein the decomposable metal compound is a metal salt.
Claim 6
Dependent Claim
29 words
A method of claim 4, wherein the decomposable compound is selected from the group consisting of metal nitrate, metal nitrite, metal carbonate and ammonium salts of transition metal oxyanions.
Claim 7
Dependent Claim
13 words
A method of claim 4, wherein the decomposable metal compound is ammonium vanadate.
Claim 8
Dependent Claim
13 words
A method of claim 1, wherein the decomposable metal compound is silver nitrate.
Claim 9
Dependent Claim
23 words
A method of claim 1, wherein a first decomposable metal compound is mixed with a second decomposable metal compound prior to thermal treatment.
Claim 10
Dependent Claim
16 words
A method of claim 8, wherein the decomposable metal salts are ammonium vanadate and silver nitrate.
Claim 11
Dependent Claim
23 words
A method of claim 1, wherein the thermally treated decomposable metal compound is combined with a metal oxide prior to forming the cathode.
Claim 12
Dependent Claim
20 words
A method of claim 1, further comprising the step of admixing a suitable binder material prior to forming the cathode.
Claim 13
Dependent Claim
11 words
A method of claim 11, wherein the binder material is carbon.
Claim 14
Dependent Claim
13 words
A method of claim 12, wherein the binder material is carbon and Teflon.
Claim 15
Dependent Claim
34 words
A method of claim 1, further comprising the step of admixing a metal selected from the group consisting of groups IB, IIB, IIIB, IVB, VB, VIB, VIIB, and VIII prior to forming 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) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |