US4959281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non aqueous electrolyte cell
Assignee: Sony Corp
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Filing: 1989-08-29
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Granted: 1990-09-25
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Expires: 2009-08-29
Abstract
Abstract An improved non-aqueous electrolyte cell is disclosed in which specific carbonaceous material is used as an anode. The carbonaceous material has interlayer spacing d 002 of not less than 3.70 A, true density not larger than 1.70 g/cm 3 and no exothermic peak not less than 700° C. upon differential thermal analysis under air stream. The combination with cathode active material containing Li in an amount not less than 250 mAH/g in term of charging/discharging capacity, provides superior cyclic life characterisitcs and large capacity.
Inventors
- 👤 Yoshio Nishi
- 👤 Hideto Azuma
- 👤 Atsuo Omaru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:04
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M10/00; H01M10/05; H01M10/052; H01M10/0525; H01M4/36; H01M4/58; H01M4/583; H01M4/587; H01M4/48; H01M4/52; H01M4/525; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
81 words
A non-aqueous electrolyte cell comprising an anode of a carbonaceous material having an interlayer spacing d 002 of not less than 3.70 A, true density of less than 1.70 g/cm 3 and not having exothermic peak at not less than 700° C. as measured by a differential thermal analysis in air stream, a cathode containing Li in an amount corresponding to the charging/discharging capacity of not less than 200 mAH per 1 gram of said carbonaceous material; and a non-aqueous electrolyte.
Claim 2
Dependent Claim
81 words
A non-aqueous electrolyte cell comprising an anode of a carbonaceous material having an interlayer spacing d 002 of not less than 3.70 A, true density of less than 1.70 g/cm 3 and not having exothermic peak at not less than 700° C. as measured by a differential thermal analysis in air stream, a cathode containing Li in an amount corresponding to the charging/discharging capacity of not less than 200 mAH per 1 gram of said carbonaceous material; and a non-aqueous electrolyte.
Claim 3
Dependent Claim
29 words
A non-aqueous electrolyte cell according to claim 1, said cathode contains cathode active material expressed as LiMO 2 wherein M stands for at least one of Co and Ni.
Claim 4
Dependent Claim
17 words
A non-aqueous electrolyte cell according to claim 1, said carbonaceous material is obtained by carbonizing furan resin.
References Cited (Backward Citations)
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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) | 1993-09-24 | 1994-03-26 | 1994-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-24 | 1998-03-26 | 1998-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-24 | 2002-03-26 | 2002-09-25 | $7700.00 | Window Closed / Lapsed |