US5326658A
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US
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Lithium secondary battery using a non-aqueous solvent
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1992-12-17
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Granted: 1994-07-05
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Expires: 2012-12-17
Abstract
Abstract The invention provides for a lithium secondary battery using a non-aqueous solvent wherein the anode material is prepared by the pyrolysis of organic compound starting materials obtained by reacting at least one conjugated polycyclic compound with a nitro compound or with a nitrating agent. The anode material contains at least the elements carbon and nitrogen, the nitrogen content ranging from 0.5% to 6% by weight. Eighty percent or more of this nitrogen is bound to carbon by either C--N or C═N bonds. The ratio of the intensity of the x-ray photoelectron spectroscopy ("XPS") peak observed for the anode material at 401.2±0.2 eV to the intensity of peak observed for the anode material at 398.8±0.4 eV is 1.0:1 or more.
Inventors
- 👤 Yuzuru Takahashi
- 👤 Kenichi Nakamura
- 👤 Jitsuo Oishi
- 👤 Hiroaki Shigeta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:01
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/583; H01M4/587; H01M10/00; H01M10/05; H01M10/052; H01M10/0525; H01M4/13; H01M4/131; H01M4/133; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
115 words
A lithium secondary battery using a non-aqueous solvent wherein the anode material is prepared by the pyrolysis of organic compound starting materials obtained by reacting at least one conjugated polycyclic compound with a nitrocompound or with a nitrating agent, the anode material containing at least the elements carbon and nitrogen; the nitrogen content ranging from 0.5% to 6% by weight and 80% or more of this nitrogen is bound to carbon by either C--N or C═N bonds; and the ratio of the intensity of the x-ray photoelectron spectroscopy ("XPS") peak observed for the anode material at 401.2±0.2 eV to the intensity of peak observed for the anode material at 398.8±0.4 eV is 1.0:1 or more.
Claim 2
Dependent Claim
115 words
A lithium secondary battery using a non-aqueous solvent wherein the anode material is prepared by the pyrolysis of organic compound starting materials obtained by reacting at least one conjugated polycyclic compound with a nitrocompound or with a nitrating agent, the anode material containing at least the elements carbon and nitrogen; the nitrogen content ranging from 0.5% to 6% by weight and 80% or more of this nitrogen is bound to carbon by either C--N or C═N bonds; and the ratio of the intensity of the x-ray photoelectron spectroscopy ("XPS") peak observed for the anode material at 401.2±0.2 eV to the intensity of peak observed for the anode material at 398.8±0.4 eV is 1.0:1 or more.
Claim 3
Dependent Claim
31 words
A lithium secondary battery using a non-aqueous solvent according to claim 1 wherein the conjugated polycyclic compound is a pitch having a softening point of 170° C. or less or tar.
Claim 4
Dependent Claim
19 words
A lithium secondary battery using a non-aqueous solvent according to claim 2 wherein the nitrocompound is an aromatic nitrocompound.
Claim 5
Dependent Claim
18 words
A lithium secondary battery using a non-aqueous solvent according to claim 3 wherein the aromatic nitrocompound is dinitronaphthalene.
Claim 6
Dependent Claim
40 words
A lithium secondary battery using a non-aqueous solvent according to claim 1 wherein the anode material is prepared by pyrolyzing the organic compound starting materials at temperatures of from 800° C. to 1800° C. under an atmosphere of non-reactive gas,
Claim 7
Dependent Claim
36 words
A lithium secondary battery using a non-aqueous solvent according to claim 1 wherein the d 002 interlayer spacing of the pyrolyzed organic compound starting material is in the range of from 3.4 Å to 3.7 Å.
Claim 8
Dependent Claim
28 words
A lithium secondary battery using a non-aqueous solvent according to claim 1 wherein the crystallite size of the pyrolyzed organic compound starting material is 70 Å or less.
Claim 9
Dependent Claim
112 words
An anode material for a lithium secondary battery using a non-aqueous solvent prepared by pyrolyzing organic compound starting materials obtained by reacting at least one conjugated polycyclic compound with a nitrocompound or with a nitrating agent, the anode material containing at least the elements carbon and nitrogen; the nitrogen content ranging from 0.5% to 6% by weight and 80% or more of this nitrogen is bound to carbon by either C--N or C═N bonds; and the ratio of the intensity of the x-ray photoelectron spectroscopy ("XPS") peak observed for the anode material at 401.2±0.2 eV to the intensity of peak observed for the anode material at 398.8±0.4 eV is 1.0:1 or more.
Claim 10
Dependent Claim
112 words
An anode material for a lithium secondary battery using a non-aqueous solvent prepared by pyrolyzing organic compound starting materials obtained by reacting at least one conjugated polycyclic compound with a nitrocompound or with a nitrating agent, the anode material containing at least the elements carbon and nitrogen; the nitrogen content ranging from 0.5% to 6% by weight and 80% or more of this nitrogen is bound to carbon by either C--N or C═N bonds; and the ratio of the intensity of the x-ray photoelectron spectroscopy ("XPS") peak observed for the anode material at 401.2±0.2 eV to the intensity of peak observed for the anode material at 398.8±0.4 eV is 1.0:1 or more.
Claim 11
Dependent Claim
31 words
An anode material according to claim 8 wherein the conjugated polycyclic compound is a pitch having a softening point of 170° C. or less or tar and the nitrocompound is dinitronaphthalene.
Claim 12
Dependent Claim
121 words
An anode material is sheet form for use in the preparation of anodes for a secondary battery, which anode material is prepared by pyrolyzing organic compound starting materials obtained by reacting at least one conjugated polycyclic compound with a nitrocompound or with a nitrating agent, the anode material containing at least the elements carbon and nitrogen; the nitrogen content ranging from 0.5% to 6% by weight and 80% or more of this nitrogen is bound to carbon by either C--N or C═N bonds; and the ratio of the intensity of the x-ray photoelectron spectroscopy ("XPS") peak observed for the anode material at 401.2±0.2 eV to the intensity of peak observed for the anode material at 398.8±0.4 eV is 1.0:1 or more.
Claim 13
Dependent Claim
121 words
An anode material is sheet form for use in the preparation of anodes for a secondary battery, which anode material is prepared by pyrolyzing organic compound starting materials obtained by reacting at least one conjugated polycyclic compound with a nitrocompound or with a nitrating agent, the anode material containing at least the elements carbon and nitrogen; the nitrogen content ranging from 0.5% to 6% by weight and 80% or more of this nitrogen is bound to carbon by either C--N or C═N bonds; and the ratio of the intensity of the x-ray photoelectron spectroscopy ("XPS") peak observed for the anode material at 401.2±0.2 eV to the intensity of peak observed for the anode material at 398.8±0.4 eV is 1.0:1 or more.
Claim 14
Dependent Claim
34 words
An anode material in sheet form according to claim 10 wherein the conjugated polycyclic compound is a pitch having a softening point of 170° C. or less or tar and the nitrocompound is dinitronaphthalene.
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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) | 1997-07-04 | 1998-01-03 | 1998-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-04 | 2002-01-03 | 2002-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-04 | 2006-01-03 | 2006-07-05 | $7700.00 | Window Closed / Lapsed |