US4863818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graphite intercalation compound electrodes for rechargeable batteries and a method for the manufacture of the same
Assignee: Sharp Corp
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Filing: 1987-06-23
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Granted: 1989-09-05
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Expires: 2007-06-23
Abstract
Abstract A method for the manufacture of a pyrolytic graphite with high crystallinity comprising the deposition of graphite directly onto a catalytic substrate by thermal decomposition of a carbon-containing material at low temperatures. An electrode with graphite as an active material and an electrode substrate as a current collector unified, said graphite being pyrolytic graphite that is deposited on a metal electrode substrate with catalytic properties so as to cover said metal electrode substrate by the method. A battery has a pair of positive and negative electrodes, at least one of which is made of graphite as its electrode active material.
Inventors
- 👤 Yoshikazu Yoshimoto
- 👤 Tomonari Suzuki
- 👤 Hiroshi Wada
- 👤 Masaru Yoshida
- 👤 Shigeo Nakajima
- 👤 Yoshimitsu Tajima
- 👤 Nobuhiro Yanagisawa
- 👤 Motoo Mohri
- 👤 Michiyo Kasahara
- 👤 Hideaki Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:58
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/13; H01M4/133; B; B82; B82Y; B82Y30/00; C; C01; C01B; C01B32/00; C01B32/20; C01B32/205; C01B32/21; C01B32/22; C23; C23C; C23C16/00; C23C16/22; C23C16/26; D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/127; D01F9/1271; D01F9/1272; D01F9/1273; D01F9/1275; D01F9/1276; D01F9/133; H01M10/00; H01M10/05; H01M10/052; H01M10/0525; H01M4/36; H01M4/58; H01M4/583; H01M4/86; H01M4/96; C01P; C01P2002/00; C01P2002/70; C01P2002/78; H01M4/587; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
77 words
An electrode with graphite as an active material and a metal electrode substrate as a current collector unified, said graphite being pyrolytic graphite that is directly deposited on said metal electrode substrate with catalytic properties so as to cover said metal electrode substrate by thermal decomposition of a carbon-containing material at a temperature of 1000° C. or less, wherein said pyrolytic graphite is doped with an alkali metal, alkaline earth metal, rare earth metal, or transition metal.
Claim 2
Dependent Claim
77 words
An electrode with graphite as an active material and a metal electrode substrate as a current collector unified, said graphite being pyrolytic graphite that is directly deposited on said metal electrode substrate with catalytic properties so as to cover said metal electrode substrate by thermal decomposition of a carbon-containing material at a temperature of 1000° C. or less, wherein said pyrolytic graphite is doped with an alkali metal, alkaline earth metal, rare earth metal, or transition metal.
Claim 3
Dependent Claim
72 words
An electrode with graphite as an active material and a metal electrode substrate as a current collector unified, said graphite being pyrolytic graphite that is directly deposited on said metal electrode substrate with catalytic properties so as to cover said metal electrode substrate by thermal decomposition of a carbon-containing material at a temperature of 1000° C. or less, wherein said pyrolytic graphite is doped with a halogen, halogen compound, or oxygen acid.
Claim 4
Dependent Claim
72 words
An electrode with graphite as an active material and a metal electrode substrate as a current collector unified, said graphite being pyrolytic graphite that is directly deposited on said metal electrode substrate with catalytic properties so as to cover said metal electrode substrate by thermal decomposition of a carbon-containing material at a temperature of 1000° C. or less, wherein said pyrolytic graphite is doped with a halogen, halogen compound, or oxygen acid.
Claim 5
Dependent Claim
46 words
An electrode according to claim 1, wherein the starting material for said graphite is at least one compound selected from the group consisting of acetylene, diphenylacetylene, acrylonitrile, 1,2-dibromoethylene, 2-butyne, benzene, toluene, pyridine, aniline, phenol, diphenyl, anthracene, pyrene, hexamethylbenzene, styrene, allylbenzene, cyclohexane, n-hexane, propane, pyrrole, and thiophene.
Claim 6
Dependent Claim
19 words
An electrode according to claim 1, wherein said metal electrode substrate is iron, cobalt, nickel, or an alloy thereof.
Claim 7
Dependent Claim
46 words
An electrode according to claim 2, wherein the starting material for said graphite is at least one compound selected from the group consisting of acetylene, diphenylacetylene, acrylonitrile, 1,2-dibromoethylene, 2-butyne, benzene, toluene, pyridine, aniline, phenol, diphenyl, anthracene, pyrene, hexamethybenzene, styrene, allylbenzene, cyclohexane, n-hexane, propane, pyrrole, and thiophene.
Claim 8
Dependent Claim
33 words
A battery having a pair of positive and negative electrodes, at least one of which is made of graphite as its electrode active material, said electrode being the electrode according to claim 1.
Claim 9
Dependent Claim
21 words
A battery according to claim 6, wherein said metal electrode substrate is iron, cobalt, nickel, or an alloy of these metals.
Claim 10
Dependent Claim
33 words
A battery having a pair of positive and negative electrodes, at least one of which is made of graphite as its electrode active material, said electrode being the electrode according to claim 2.
Claim 11
Dependent Claim
18 words
The battery of claim 8 wherein said metal electrode substrate is iron, cobalt, nickel, or an alloy thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-09-04 | 1993-03-06 | 1993-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-04 | 1997-03-06 | 1997-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-04 | 2001-03-06 | 2001-09-05 | $7700.00 | Window Closed / Lapsed |