US5604057A
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US
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Secondary cell having a lithium intercolating manganese oxide
Assignee: Motors Liquidation Co
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Filing: 1995-11-27
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Granted: 1997-02-18
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Expires: 2015-11-27
Abstract
Abstract A secondary lithium ion cell having an anode, a cathode and a nonaqueous electrolyte wherein the cathode comprises sub-micron-size amorphous, microporous, lithium-intercalateable manganese oxide having an internal surface area greater than about 100 m2/g. The cathode may include an electrically conductive lithium-intercalateable polymer binder. A sol-gel process for making the amorphous quatravalent manganese oxide is disclosed.
Inventors
- 👤 Gholam-Abbas Nazri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:25
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/13; H01M4/131; C; C01; C01G; C01G45/00; C01G45/02; H01M4/36; H01M4/48; H01M4/50; H01M4/505; H01M4/60; H01M4/602; H01M4/606; H01M4/608; H01M4/62; H01M4/621; H01M4/622; H01M4/64; H01M4/66; H01M4/665; H01M4/667; C01P; C01P2002/00; C01P2002/02; C01P2002/70; C01P2002/72; C01P2004/00; C01P2004/01; C01P2004/03; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/12; C01P2006/40; H01M10/00; H01M10/05; H01M10/052; H01M2300/00; H01M2300/0017; H01M2300/0025; H01M4/139; H01M4/1391; H01M4/661; H01M4/663; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
54 words
In a secondary lithium-ion cell comprising an anode, a cathode and a non-aqueous, lithium-ion conducting electrolyte between said anode and cathode, the improvement wherein said cathode comprises submicron-size, amorphous, microporous, lithium-intercalateable, quatravalent, manganese oxide particles supported on an electrical conductor, said particles having an internal surface area greater than about 100 m 2 /g.
Claim 2
Dependent Claim
54 words
In a secondary lithium-ion cell comprising an anode, a cathode and a non-aqueous, lithium-ion conducting electrolyte between said anode and cathode, the improvement wherein said cathode comprises submicron-size, amorphous, microporous, lithium-intercalateable, quatravalent, manganese oxide particles supported on an electrical conductor, said particles having an internal surface area greater than about 100 m 2 /g.
Claim 3
Dependent Claim
31 words
A cell according to claim 1 wherein said manganese oxide has a particle size less than about 0.3 microns and an internal surface area greater than about 200 m 2 /g.
Claim 4
Dependent Claim
63 words
In a secondary lithium-ion cell comprising an anode, a cathode and a non-aqueous, lithium-ion conducting electrolyte between said anode and cathode, the improvement wherein said cathode comprises submicron-size, amorphous, microporous, lithium-intercalateable, quatravalent, manganese oxide particles supported on an electrical conductor and bound together by an electrically conductive, lithium-intercalateable, polymer, said particles having an internal surface area greater than about 100 m 2 /g.
Claim 5
Dependent Claim
63 words
In a secondary lithium-ion cell comprising an anode, a cathode and a non-aqueous, lithium-ion conducting electrolyte between said anode and cathode, the improvement wherein said cathode comprises submicron-size, amorphous, microporous, lithium-intercalateable, quatravalent, manganese oxide particles supported on an electrical conductor and bound together by an electrically conductive, lithium-intercalateable, polymer, said particles having an internal surface area greater than about 100 m 2 /g.
Claim 6
Dependent Claim
23 words
A secondary cell according to claim 3 wherein said polymer is selected from the group consisting of polyaniline, polypyrole, polythiophene and derivatives thereof.
Claim 7
Dependent Claim
12 words
A secondary cell according to claim 4 wherein said polymer comprises polyaniline.
Claim 8
Dependent Claim
26 words
A secondary cell according to claim 5 wherein said polyaniline comprises up to about 22% by weight of the mixture of manganese oxide particles and polyaniline.
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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) | 2000-02-18 | 2000-08-19 | 2001-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-18 | 2004-08-19 | 2005-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-18 | 2008-08-19 | 2009-02-18 | $7700.00 | Window Closed / Lapsed |