US4980250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary battery
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1987-05-05
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Granted: 1990-12-25
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Expires: 2007-05-05
Abstract
Abstract A secondary battery comprising a rechargeable positive electrode, a rechargeable lithium-containing negative electrode, a separator allowing the positive electrode and negative electrode to be separated from each other, and organic electrolyte solution for connecting the positive electrode and negative electrode. The negative electrode includes a complex having a carbon molded article made of carbon fiber or carbon powder having an interfacial distance (d 002 ) of 3.38 to 3.56 Å as measured by X-ray diffraction analysis using silicon as standard material, wherein lithium have been absorbed into the carbon molded article beforehand. The above value of interfacial distance corresponds to 3.36 to 3.48 Å as measured by X-ray diffraction analysis using no standard material.
Inventors
- 👤 Yuzuru Takahashi
- 👤 Yoshio Kawai
- 👤 Naoto Sakurai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:31
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; H01M4/64; H01M4/66; H01M4/663; H01M10/056; H01M10/0564; H01M10/0566; H01M10/0568; H01M4/13; H01M4/133; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
95 words
A secondary battery comprising: a rechargeable positive electrode; a rechargeable lithium-containing negative electrode including a complex having a carbon molded article made of carbon fiber or carbon powder having an interfacial distance (d 002 ) of 3.38 to 3.56 Å as measured by X-ray diffraction analysis using silicon as standard material, wherein lithium is absorbed into said carbon molded article before said negative electrode is placed in the secondary battery; a separator for separating said positive electrode and negative electrode from each other; and organic electrolyte solution for connecting said positive electrode and negative electrode.
Claim 2
Dependent Claim
95 words
A secondary battery comprising: a rechargeable positive electrode; a rechargeable lithium-containing negative electrode including a complex having a carbon molded article made of carbon fiber or carbon powder having an interfacial distance (d 002 ) of 3.38 to 3.56 Å as measured by X-ray diffraction analysis using silicon as standard material, wherein lithium is absorbed into said carbon molded article before said negative electrode is placed in the secondary battery; a separator for separating said positive electrode and negative electrode from each other; and organic electrolyte solution for connecting said positive electrode and negative electrode.
Claim 3
Dependent Claim
19 words
A secondary battery according to claim 1, wherein said carbon fiber has a diameter of 0.01 to 100 μm.
Claim 4
Dependent Claim
21 words
A secondary battery according to claim 1, wherein said carbon powder has a mean particle size of 0.1 to 30 μm.
Claim 5
Dependent Claim
16 words
A secondary battery according to claim 1, wherein said carbon molded article is a laminated product.
Claim 6
Dependent Claim
25 words
A secondary battery according to claim 1, wherein said carbon molded article contains binder of 50 weight % of the carbon molded article or less.
Claim 7
Dependent Claim
24 words
A secondary battery according to claim 5, wherein said carbon molded article made of carbon fiber contains binder of 2 to 50 weight %.
Claim 8
Dependent Claim
24 words
A secondary battery according to claim 5, wherein said carbon molded article made of carbon powder contains binder of 1 to 20 weight %.
Claim 9
Dependent Claim
24 words
A secondary battery according to claim 1, wherein said carbon molded article has a specific electric resistance of 10 6 Ω. cm or less.
Claim 10
Dependent Claim
23 words
A secondary battery according to claim 1, wherein said carbon molded article has a bulk density of 1 to 2 g/cm 3 .
Claim 11
Dependent Claim
30 words
A secondary battery according to claim 1, wherein said carbon molded article includes absorbed lithium, the amount of which is 0.2 to 65 g per 100 g carbon molded article.
Claim 12
Dependent Claim
22 words
A secondary battery according to claim 1, wherein said organic electrolyte solution contains organic solvent into which lithium salt has been dissolved.
Claim 13
Dependent Claim
19 words
A secondary battery according to claim 11, wherein said lithium salt has a concentration of 0.1 to 5 mol/l.
Claim 14
Dependent Claim
17 words
A secondary battery according to claim 1, wherein said separator includes synthetic resin containing organic electrolyte solution.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-24 | 1994-06-25 | 1994-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-24 | 1998-06-25 | 1998-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-24 | 2002-06-25 | 2002-12-25 | $7700.00 | Window Closed / Lapsed |