US5093216A
Expired / Lapsed
US
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Carbonaceous material and a non aqueous electrolyte cell using the same
Assignee: Sony Corp
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Filing: 1990-07-27
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Granted: 1992-03-03
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Expires: 2010-07-27
Abstract
Abstract A carbonaceous material and a non-aqueous electrolyte cell using the carbonaceous material as an anode are disclosed. The carbonaceous material has an interlayer spacing, d002, of not less than 3.70 angstroms and a true density of less than 1.70 g/cm<3>, and contains from 0.2 to 5.0 weight % of phosphorus. The carbonaceous material has a large doping capacity for Li, and the non-aqueous electrolyte cell using the material has a large capacity and improved charge-discharge cycle characteristics.
Inventors
- 👤 Hideto Azuma
- 👤 Atsuo Omaru
- 👤 Yoshio Nishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:18
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/02; C10C3/04; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; H; H01; H01M; H01M10/00; H01M10/05; H01M10/052; H01M10/0525; H01M4/00; H01M4/02; H01M4/04; H01M4/0438; H01M4/0459; H01M4/36; H01M4/38; H01M4/58; H01M4/583; H01M4/587; H01M2004/026; H01M2004/027; H01M2300/00; H01M2300/0017; H01M2300/0025; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
57 words
A carbonaceous material having an interlayer spacing, d 002 , of not less than 3.70 angstroms and a true density of less than 1.70 g/cm 3 , having no exothermic peak at not less than 700° C. as measured by a differential thermal analysis in air stream, and containing from 0.2 to 5.0 weight % of phosphorus.
Claim 2
Dependent Claim
57 words
A carbonaceous material having an interlayer spacing, d 002 , of not less than 3.70 angstroms and a true density of less than 1.70 g/cm 3 , having no exothermic peak at not less than 700° C. as measured by a differential thermal analysis in air stream, and containing from 0.2 to 5.0 weight % of phosphorus.
Claim 3
Dependent Claim
18 words
A carbonaceous material according to claim 1, wherein said carbonaceous material is obtained by carbonizing an organic material.
Claim 4
Dependent Claim
15 words
A carbonaceous material according to claim 2, wherein said organic material is a furan resin.
Claim 5
Dependent Claim
30 words
A carbonaceous material according to claim 2, wherein said organic material is a petroleum pitch having a H/C atomic ratio between 0.6 and 0.8 and containing functional groups containing oxygen.
Claim 6
Dependent Claim
102 words
A non-aqueous electrolyte cell comprising: an anode including a carbonaceous material amenable to doping and de-doping with Li; a cathode of a compound including Li for doping said carbonaceous material when a charge is applied to said non-acqueous electrolyte cell; and a non-aqueous electrolyte; wherein said carbonaceous material has an interlayer spacing, d 002 , of not less than 3.70 angstroms and a true density of less than 1.70 g/cm 3 , having no exothermic peak at not less than 700° C. as measured by a differential thermal analysis in air stream, and contains from 0.2 to 5.0 weight % of phosphorus.
Claim 7
Dependent Claim
102 words
A non-aqueous electrolyte cell comprising: an anode including a carbonaceous material amenable to doping and de-doping with Li; a cathode of a compound including Li for doping said carbonaceous material when a charge is applied to said non-acqueous electrolyte cell; and a non-aqueous electrolyte; wherein said carbonaceous material has an interlayer spacing, d 002 , of not less than 3.70 angstroms and a true density of less than 1.70 g/cm 3 , having no exothermic peak at not less than 700° C. as measured by a differential thermal analysis in air stream, and contains from 0.2 to 5.0 weight % of phosphorus.
Claim 8
Dependent Claim
34 words
A non-aqueous electrolyte cell according to claim 5, wherein said cathode contains Li in an amount of corresponding to the charge/discharge capacity of not less than 350 mAH per gram of said carbonaceous material.
Claim 9
Dependent Claim
33 words
A non-aqueous electrolyte cell according to claim 5, wherein said cathode contains Li in an amount corresponding to the charge/discharge capacity of not less than 350 mAH per gram of said carbonaceous material.
Claim 10
Dependent Claim
33 words
A non-aqueous electrolyte cell according to claim 5, wherein said cathode contains a cathode active material of the formula, LiMO 2 , wherein M stands for at least one of Co and Ni.
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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) | 1995-03-03 | 1995-09-02 | 1996-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-03 | 1999-09-02 | 2000-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-03 | 2003-09-02 | 2004-03-03 | $7700.00 | Window Closed / Lapsed |