EP0165047A2
Expired / Lapsed
EP
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Pseudo graphite electrode material obtained by pyrolysis
Assignee: Mitsubishi Chemical Corp
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Filing: 1985-06-11
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Granted: —
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Expires: 2005-06-11
Abstract
Abstract @ An electrode material is made of a carbonaceous material obtained by the pyrolysis of an organic compound capable of forming the graphite structure. This carbonaceous material is such that the spacing of (002) planes, d002, is at least 3.37Å and the crystallite size in the directionof c axis, Lc, is not more than 220 Å, as determined by X-ray wide-angle diffractiometry, and the line width pp between peaks in the first differential of the absorption spectrum of electron spin resonance is at least 10 gauss. Classes of organic compound wherein C - C bonds change to a benzene structure on pyrolysis are disclosed. Pyrolysis can be at 300-3,000 for 10 minutes to 20 hours. The electrode material can be in various forms and is capable of providing a stable secondary battery that produces high electromotive force and which has high energy density.
Inventors
- 👤 Mitsutaka Miyabayashi
- 👤 Akira Itsubo
- 👤 Yoshitomo Nakano
- 👤 Masami Takahashi
- 👤 Mitsuru Ueda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 00:54
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/583; H01M4/587; C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/524; H01M10/00; H01M10/05; H01M10/052; H01M4/86; H01M4/96; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
87 words
An electrode material which is a carbonaceous material obtained by pyrolyzing an organic compound capable of forming the graphite structure, said carbonaceous material having such a pseudo-graphite structure that the spacing of (002) planes, d002, is at least 3.37 Å and the crystallite size in the direction of c axis, Lc, is not more than 220 A, as determined by X-ray wide-angle diffractiometry, and the line width ΔHpp between peaks in the first differential of the absorption spectrum of electron spin resonance is at least 10 gauss.
Claim 2
Dependent Claim
87 words
An electrode material which is a carbonaceous material obtained by pyrolyzing an organic compound capable of forming the graphite structure, said carbonaceous material having such a pseudo-graphite structure that the spacing of (002) planes, d002, is at least 3.37 Å and the crystallite size in the direction of c axis, Lc, is not more than 220 A, as determined by X-ray wide-angle diffractiometry, and the line width ΔHpp between peaks in the first differential of the absorption spectrum of electron spin resonance is at least 10 gauss.
Claim 3
Dependent Claim
53 words
An electrode material according to claim 1, wherein the spacing of (002) planes, d002, is at least 3.40 A and not more than 3.74 A and the crystallite size in the direction of c axis, Lc, is at least 7.0 A and not more' than 150 A, as determined by X-ray wide-angle diffractiometry.
Claim 4
Dependent Claim
53 words
An electrode material according to claim 1; wherein the spacing of (002) planes, d002, is at least 3.41 A and not more than 3.70 A and the crystallite size in the direction of c axis, Lc, is at least 7.0 A and not more than 70 A, as determined by X-ray wide-angle diffractiometry.
Claim 5
Dependent Claim
27 words
An electrode material according to claim 1, wherein the line width (AHpp) between peaks in the first differential of the absorption spectrum is at least 12 gauss.
Claim 6
Dependent Claim
38 words
An electrode material according to any of claims 1 to 4, wherein said carbonaceous material was obtained by pyrolyzing said organic compound at between 300 and 3,000°C and for a period of from 10 minutes to 20 hours.
Claim 7
Dependent Claim
31 words
An electrode material according to any of Claims 1 to 5, wherein said organic compound capable of forming the graphite structure comprises a condensed polycyclic hydrocarbon compound or polycyclic heterocyclic compound.
Claim 8
Dependent Claim
40 words
An electrode material according to claim 6, wherein said organic compound capable of forming the graphite structure comprises tetracarboxylic acid, tetracarboxylic acid dianhydride or tetracarboxylic acid diimide substituted compounds of benzene, naphthalene, isoquinolene, phthalazine, perylene, terylene, pyrene, chrysene or coronene.
Claim 9
Dependent Claim
65 words
An electrode material according to any of claims 1 to 5, wherein said organic compound capable of forming the graphite structure is a linear high-molecular weight novolak resin obtained by polycondensing an aldehyde compound with a mono-substituted phenol having a substituent on the ortho- or para-position in the presence of an acidic catalyst; and which resin may be cured by reaction with a curing agent.
Claim 10
Dependent Claim
24 words
An electrode material according to claim 8, wherein said linear high-molecular weight novolak resin has a number average molecular weight of at least 1,000.
Claim 11
Dependent Claim
42 words
An electrode material according to any of claims 1 to 5, wherein said organic compound capable of forming the graphite structure comprises poly(α-halo- crylonitrile), poly(α-halocrylonitrile), poly(halodicyanoethylene), poly(cyanoacetylene) or poly(dicyanoacetylene), the pyrolyzed carbonaceous material having a H/C atomic ratio of 0.010 - 0.55.
Claim 12
Dependent Claim
27 words
. An electrode material according to any of claims 1 to 5, wherein said organic compound capable of forming the graphite structure is polyphenylene or poly(substituted phenylene).
References Cited (Backward Citations)
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