US4978600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode and a method for the production of the same
Assignee: Sharp Corp
•
Filing: 1989-06-07
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Granted: 1990-12-18
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Expires: 2009-06-07
Abstract
Abstract An electrode comprising a graphite composition as an active material is disclosed wherein the graphite composition is composed of high-crystalline graphite having interlayer spacings in the range of 0.3354 to 0.3400 nm and low-crystalline graphite having interlayer spacings in the range of 0.343 to 0.355 nm.
Inventors
- 👤 Tomonari Suzuki
- 👤 Hiroshi Wada
- 👤 Yoshikazu Yoshimoto
- 👤 Masaru Yoshida
- 👤 Shigeo Nakajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:40
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/583; H01M4/587; C; C23; C23C; C23C16/00; C23C16/22; C23C16/26; H01M4/13; H01M4/133; H01M4/86; H01M4/96; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
49 words
In an electrode comprising a graphite composition as an active material, the improvement including that said graphite composition is a mixture of high-crystalline graphite having interlayer spacings in the range of 0.3354 to 0.3400 nm and low-crystalline graphite having interlayer spacings in the range of 0.343 to 0.355 nm.
Claim 2
Dependent Claim
49 words
In an electrode comprising a graphite composition as an active material, the improvement including that said graphite composition is a mixture of high-crystalline graphite having interlayer spacings in the range of 0.3354 to 0.3400 nm and low-crystalline graphite having interlayer spacings in the range of 0.343 to 0.355 nm.
Claim 3
Dependent Claim
43 words
An electrode according to claim 1, wherein said graphite composition has a ratio of the diffraction intensity at 2θ=25.0° to a diffraction intensity of the peak corresponding to the (002) reflection at 2θ=26.3° in an X-ray diffraction profile ranging from 0.03 to 0.90.
Claim 4
Dependent Claim
16 words
An electrode according to claim 1, wherein said diffraction intensity ratio ranges from 0.03 to 0.50.
Claim 5
Dependent Claim
21 words
An electrode according to claim 1, wherein said graphite composition is directly deposited on an electrode substrate by chemical vapor deposition.
Claim 6
Dependent Claim
26 words
An electrode according to claim 4, wherein said electrode substrate is made of iron, cobalt, nickel, or an alloy containing at least one of these metals.
Claim 7
Dependent Claim
24 words
An electrode according to claim 1, wherein said high-crystalline graphite is carbon fibers heat-treated at high temperatures and said low-crystalline graphite is pitch coke.
Claim 8
Dependent Claim
16 words
An electrode according to claim 1, wherein said diffraction intensity ratio ranges from 0.03 to 0.50.
Claim 9
Dependent Claim
21 words
An electrode according to claim 2, wherein said graphite composition is directly deposited on an electrode substrate by chemical vapor deposition.
Claim 10
Dependent Claim
26 words
An electrode according to claim 8, wherein said electrode substrate is made of iron, cobalt, nickel, or an alloy containing at least one of these metals.
Claim 11
Dependent Claim
24 words
An electrode according to claim 2, wherein said high-crystalline graphite is carbon fibers heat-treated at high temperatures and said low-crystalline graphite is pitch coke.
Claim 12
Dependent Claim
30 words
An electrode according to claim 4, wherein the coating of said graphite composition directly deposited on said electrode substrate has a thickness in the range of 1 to 300 μm.
Claim 13
Dependent Claim
26 words
An electrode according to claim 11, wherein said electrode substrate is made of iron, cobalt, nickel, or an alloy containing at least one of these metals.
References Cited (Backward Citations)
US3725110A
Cited
US3844837A
Cited
US4048953A
Cited
US4264686A
Cited
US4707423A
Cited
EP0165047A2
Cited
US4645713A
Cited
EP0201038A1
Cited
EP0205856A2
Cited
EP0239410A2
Cited
US4863814A
Cited
EP0249331A1
Cited
EP0248386A2
Cited
EP0251677A2
Cited
EP0273562A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-17 | 1994-06-18 | 1994-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-17 | 1998-06-18 | 1998-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-17 | 2002-06-18 | 2002-12-18 | $7700.00 | Window Closed / Lapsed |