US5028500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbonaceous electrodes for lithium cells
Assignee: MOLI ENERGY (1990) Ltd A CANADIAN CORP
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Filing: 1989-05-11
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Granted: 1991-07-02
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Expires: 2009-05-11
Abstract
Abstract A rechargeble battery of alkali metal, organic electrolyte type has a low surface area particulate carbonaceous electrode intercalable with the alkali metal and experiences little capacity loss upon intercalation of the carbonaceous electrode with the alkali metal. The carbonaeous electrode may include a multi-phase composition including both highly graphitized and less graphitized phases or may include a single phase, highly graphitized composition which has been subjected to interlation of lithium at above about 50° C. Incorporation of an electrically conductive filamentary material such as carbon black intimately interspersed with the carbonaceous composition minimizing capacity loss upon repeated cycling.
Inventors
- 👤 Rosamaria Fong
- 👤 Harith Al-Janby
- 👤 Jeffrey R. Dahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:03
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/583; H01M4/587; D; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F11/129; H01M10/00; H01M10/05; H01M10/052; H01M10/0525; H01M4/13; H01M4/133; H01M10/056; H01M10/0564; H01M10/0566; H01M10/0569; H01M10/058; H01M10/0587; H01M10/42; H01M10/44; H01M10/446; H01M4/62; H01M4/624; H01M4/625; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
89 words
A rechargeable battery comprising a first electrode and a counterelectrode each capable of reversibly incorporating an alkali metal, an alkali metal incorporated in at least one of said electrodes, and an electrolyte comprising an organic solvent and a salt of said alkali metal wherein said first electrode includes a particulate composition including carbon, substantially every particle of said composition including a first carbonaceous phase and a second carbonaceous phase intimately admixed with said first carbonaceous phase, said first phase having a higher degree of graphitization than said second phase.
Claim 2
Dependent Claim
89 words
A rechargeable battery comprising a first electrode and a counterelectrode each capable of reversibly incorporating an alkali metal, an alkali metal incorporated in at least one of said electrodes, and an electrolyte comprising an organic solvent and a salt of said alkali metal wherein said first electrode includes a particulate composition including carbon, substantially every particle of said composition including a first carbonaceous phase and a second carbonaceous phase intimately admixed with said first carbonaceous phase, said first phase having a higher degree of graphitization than said second phase.
Claim 3
Dependent Claim
21 words
A battery as claimed in claim 1 wherein said composition has a mean degree of graphitization of at least about 0.40.
Claim 4
Dependent Claim
37 words
A battery as claimed in claim 2 wherein said first phase comprises carbon having a degree of graphitization greater than about 0.40 and said second phase comprises carbon having a degree of graphitization less than about 0.40.
Claim 5
Dependent Claim
24 words
A battery as claimed in claim 1 wherein in substantially every particle of said composition said first phase includes a plurality of graphitic domains.
Claim 6
Dependent Claim
13 words
A battery as claimed in claim 1 wherein said composition comprises spherical graphite.
Claim 7
Dependent Claim
13 words
A battery as claimed in claim 1 wherein said composition comprises isotropic graphite.
Claim 8
Dependent Claim
104 words
A rechargeable battery comprising a first electrode, and a counterelectrode each capable of reversibly incorporating an alkali metal, an alkali metal incorporated in at least one of said electrodes and an electrolyte comprising an organic solvent and a salt of said alkali metal wherein said first electrode comprises a particulate composition including carbon, said composition having a surface area subsequent to intercalation with said alkali metal which is substantially the same as surface area of said composition prior to intercalation with said alkali metal, and wherein at least a portion of said composition is carbon having a degree of graphitization greater than about 0.40.
Claim 9
Dependent Claim
104 words
A rechargeable battery comprising a first electrode, and a counterelectrode each capable of reversibly incorporating an alkali metal, an alkali metal incorporated in at least one of said electrodes and an electrolyte comprising an organic solvent and a salt of said alkali metal wherein said first electrode comprises a particulate composition including carbon, said composition having a surface area subsequent to intercalation with said alkali metal which is substantially the same as surface area of said composition prior to intercalation with said alkali metal, and wherein at least a portion of said composition is carbon having a degree of graphitization greater than about 0.40.
Claim 10
Dependent Claim
42 words
A rechargeable battery as claimed in claim 9 wherein said first electrode includes a composition consisting essentially of carbon having a degree of graphitization greater than about 0.40 which has been intercalated with lithium at a temperature greater than about 50° C.
Claim 11
Dependent Claim
14 words
A battery as claimed in claim 7 wherein said composition is in particulate form.
Claim 12
Dependent Claim
24 words
A battery as claimed in claim 1 or claim 8 or claim 9 or claim 7 wherein said alkali metal consists essentially of lithium.
Claim 13
Dependent Claim
29 words
A battery as claimed in claim 1 or claim 8 or claim 7 wherein said alkali metal is present in intercalated form in at least one of said electrodes.
Claim 14
Dependent Claim
35 words
A battery as claimed in claim 1 or claim 9 or claim 7 wherein said particulate composition has a surface area prior to intercalation of said alkali metal less than about 10 m 2 /g.
Claim 15
Dependent Claim
26 words
A battery as claimed in claim 1 or claim 9 or claim 7 wherein said first electrode further includes carbon black interspersed with said particulate composition.
Claim 16
Dependent Claim
18 words
A rechargeable battery as claimed in claim 13 which is substantially free of pressure on said first electrode.
Claim 17
Dependent Claim
23 words
A rechargeable battery as claimed claim 13 wherein said carbon black has a surface area of less than about 50 m 2 /gm.
Claim 18
Dependent Claim
75 words
A rechargeable battery comprising a first electrode and a counterelectrode each capable of reversibly incorporating an alkali metal, an alkali metal incorporated in at least one of said electrodes and an electrolyte including an organic solvent and a salt of said alkali metal wherein said first electrode includes a particulate composition including carbon and carbon black interspersed with said particulate carbon composition, and wherein said battery is essentially free of pressure on said first electrode.
Claim 19
Dependent Claim
75 words
A rechargeable battery comprising a first electrode and a counterelectrode each capable of reversibly incorporating an alkali metal, an alkali metal incorporated in at least one of said electrodes and an electrolyte including an organic solvent and a salt of said alkali metal wherein said first electrode includes a particulate composition including carbon and carbon black interspersed with said particulate carbon composition, and wherein said battery is essentially free of pressure on said first electrode.
Claim 20
Dependent Claim
15 words
A battery as claimed in claim 16 wherein said alkali metal consists essentially of lithium.
Claim 21
Dependent Claim
23 words
A battery as claimed in claim 16 wherein said carbon black has a surface area of less than about 50 m 2 /gm.
Claim 22
Dependent Claim
21 words
A battery as claimed in claim 18 wherein said carbon black has a surface area of about 40 m 2 /gm.
Claim 23
Dependent Claim
26 words
A battery as claimed in claim 16 wherein said first electrode includes between about 1 wt. % and about 12 wt. % of said carbon black.
Claim 24
Dependent Claim
26 words
A battery as claimed in claim 20 wherein said first electrode includes between about 4 wt. % and about 7 wt. % of said carbon black.
Claim 25
Dependent Claim
77 words
A rechargeable battery comprising a first electrode and a counterelectrode each capable of reversibly incorporating an alkaline metal, an alkaline metal incorporated in at least one of said electrodes and an electrolyte comprising an organic solvent and a salt of said alkaline metal wherein said first electrode includes a particulate composition including carbon, said particulate composition having a surface area of less than about 8 m 2 /gm and a degree of graphitization less than about 0.40.
Claim 26
Dependent Claim
77 words
A rechargeable battery comprising a first electrode and a counterelectrode each capable of reversibly incorporating an alkaline metal, an alkaline metal incorporated in at least one of said electrodes and an electrolyte comprising an organic solvent and a salt of said alkaline metal wherein said first electrode includes a particulate composition including carbon, said particulate composition having a surface area of less than about 8 m 2 /gm and a degree of graphitization less than about 0.40.
Claim 27
Dependent Claim
15 words
A battery as claimed in claim 22 wherein said alkali metal consists essentially of lithium.
Claim 28
Dependent Claim
22 words
A battery as claimed in claim 22 wherein said composition has a surface area of less than about 6 m 2 /gm.
Claim 29
Dependent Claim
22 words
A battery as claimed in claim 22 wherein said composition has a surface area of less than about 4 m 2 /gm.
Claim 30
Dependent Claim
22 words
A battery as claimed in claim 22 wherein said composition has a surface area of less than about 2 m 2 /gm.
Claim 31
Dependent Claim
22 words
A battery as claimed in claim 22 wherein said composition has a surface area of at least about 0.03 m 2 /g.
Claim 32
Dependent Claim
14 words
A battery as claimed in claim 22 wherein said composition consists essentially of coke.
Claim 33
Dependent Claim
15 words
A battery as claimed in claim 28 wherein said composition consists essentially of petroleum coke.
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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) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |