US5013620A
Expired / Lapsed
US
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Nonaqueous electrolyte secondary cell
Assignee: Bridgestone Corp
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Filing: 1990-04-23
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Granted: 1991-05-07
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Expires: 2010-04-23
Abstract
Abstract A secondary cell comprising a positive electrode of an active material in the form of a lithium-containing vanadium oxide Li 1+x V 3 O 8+y which forms a solid solution with silicon or aluminum, a negative electrode of lithium or a lithium alloy, and a nonaqueous electrolytic solution containing lithium ions, the positive electrode has an increased capacity and improved cycle performance.
Inventors
- 👤 Tadaaki Miyazaki
- 👤 Takao Ogino
- 👤 Yoshitomo Masuda
- 👤 Hiroaki Wada
- 👤 Takahiro Kawagoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:23
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/485; H01M10/00; H01M10/05; H01M10/052; H01M4/38; H01M4/40; H01M4/13; H01M4/131; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
72 words
In a nonaqueous electrolyte secondary cell comprising a positive electrode, a negative electrode of lithium or a lithium alloy, and a nonaqueous electrolytic solution containing lithium ions, the improvement wherein said positive electrode includes an active material in the form of a solid solution which is obtained by incorporating a SI or Al component into a lithium-containing vanadium oxide of the formula: Li 1+x V 3 O 8+y wherein 0≦x≦0.6 and -0.5≦y≦0.3.
Claim 2
Dependent Claim
72 words
In a nonaqueous electrolyte secondary cell comprising a positive electrode, a negative electrode of lithium or a lithium alloy, and a nonaqueous electrolytic solution containing lithium ions, the improvement wherein said positive electrode includes an active material in the form of a solid solution which is obtained by incorporating a SI or Al component into a lithium-containing vanadium oxide of the formula: Li 1+x V 3 O 8+y wherein 0≦x≦0.6 and -0.5≦y≦0.3.
Claim 3
Dependent Claim
16 words
The cell of claim 1 wherein the Si component is elemental Si or SiO 2 .
Claim 4
Dependent Claim
18 words
The cell of claim 1 wherein the Al component is elemental Al or Al 2 O 3 .
Claim 5
Dependent Claim
30 words
The cell of claim 1 wherein the amount of the Si or Al component is in the range of from 0.1 to 5 atoms % relative to the vanadium atoms.
Claim 6
Dependent Claim
23 words
The cell of claim 2 wherein the amount of the Si component is 0.5 to 2.0 atom % relative to the vanadium atoms.
Claim 7
Dependent Claim
23 words
The cell of claim 3 wherein the amount of the Al component is 2 to 4 atom % relative to the vanadium atoms.
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) | 1994-05-06 | 1994-11-05 | 1995-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-06 | 1998-11-05 | 1999-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-06 | 2002-11-05 | 2003-05-07 | $7700.00 | Window Closed / Lapsed |