EP0346088A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electrode and method for its production
Assignee: Sharp Corp
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Filing: 1989-06-07
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Granted: —
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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
EP
Data Source
google_patents
Last Synchronized
2026-10-31 06:03
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: 16
Claim 1
Independent Claim
44 words
An electrode comprising a graphite composition as an active material, wherein said 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.
Claim 2
Dependent Claim
44 words
An electrode comprising a graphite composition as an active material, wherein said 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.
Claim 3
Dependent Claim
49 words
An electrode according to claim 1, wherein said graphite composition has the ratio of the diffraction intensity at 2ϑ = 25.0 o to the diffraction intensity of the peak corresponding to the (002) reflection at 2ϑ = 26.3 o in the 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 tempeatures and said low-crystalline graphite is pitch coke.
Claim 8
Dependent Claim
60 words
A method for the production of an electrode of claim 1 comprising disposing an electrode substrate within a reaction chamber for chemical vapor deposition, supplying a hydrocarbon compound as a starting material to said reaction chamber, thermally decomposing said hydrocarbon compound at a certain temperature to form a graphite composition, and directly depositing said graphite composition on said electrode substrate.
Claim 9
Dependent Claim
26 words
A method for the production of an electrode according to claim 7, wherein said hydrocarbon compound has a molecular weight equal to or less than 150.
Claim 10
Dependent Claim
32 words
A method for the production of an electrode according to claim 7, wherein said electrode substrate is made of iron, cobalt, nickel, or an alloy containing at least one of these metals.
Claim 11
Dependent Claim
29 words
A method for the production of an electrode according to claim 7, wherein the feed rate of said hydrocarbon compound is in the range of 0.05 to 15 mol/hr.
Claim 12
Dependent Claim
35 words
A method for the production of an electrode according to claim 7, wherein the number density of molecules of said hydrocarbon compound is in the range of 2.0 x 10²¹ to 2.6 x 10²² molecules/ℓ.
Claim 13
Dependent Claim
29 words
A method for the production of an electrode according to claim 7, wherein the flow rate of said hydrocarbon compound is in the range of 0.5 to 70 cm/min.
Claim 14
Dependent Claim
26 words
A method for the production of an electrode according to claim 7, wherein said temperature is in the range of 450 o to 1300 o C.
Claim 15
Dependent Claim
26 words
A method for the production of an electrode according to claim 13, wherein said temperature is in the range of 700 o to 1200 o C.
Claim 16
Dependent Claim
35 words
A method for the production of an electrode according to claim 7, wherein the coating of said graphite composition directly deposited on said electrode substrate has a thickness in the range of 1 to 300µm.
References Cited (Backward Citations)
US3725110A
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