US5494762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-aqueous electrolyte lithium secondary cell
Assignee: Denso Corp
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Filing: 1995-02-09
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Granted: 1996-02-27
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Expires: 2015-02-09
Abstract
Abstract In order to improve the charge-discharge energy density of a lithium secondary cell with a nonaqueous electrolyte having such a construction that a metallic compound capable of occluding or releasing lithium is used as an electrode active material, lithium or a lithium alloy is used as a negative electrode material and a solution of a lithium salt is used as an electrolyte, the microstructure of the metallic compound is rendered acicular. Further, a lithium-containing metallic compound grown into such a columnar form that has the angle Θ to the normal of the surface of the substrate of 0°≦Θ<90° is used as the electrode active material.
Inventors
- 👤 Hirofumi Isoyama
- 👤 Satoru Suzuki
- 👤 Jun Hasegawa
- 👤 Hirohiko Saito
- 👤 Hisano Kojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:41
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/052; C; C01; C01G; C01G45/00; C01G45/12; C01G45/1221; C01G45/1242; H01M10/42; H01M10/44; H01M4/00; H01M4/02; H01M4/13; H01M4/134; H01M4/36; H01M4/38; H01M4/40; H01M4/48; H01M4/50; H01M4/505; H01M4/52; H01M4/525; H01M50/00; H01M50/20; H01M50/233; H01M50/24; H01M50/40; H01M50/489; H01M50/497; H01M50/50; H01M50/572; H01M50/574; H01M50/581; C01P; C01P2002/00; C01P2002/70; C01P2002/72; C01P2002/77; C01P2004/00; C01P2004/80; C01P2006/00; C01P2006/40; H01M10/0525; H01M10/4235; H01M2200/00; H01M2200/10; H01M2200/20; H01M2300/00; H01M2300/0017; H01M2300/0025; H01M2300/0065; H01M2300/0068; H01M4/485; H01M4/58; H01M4/583; H01M4/587; H01M4/62; H01M4/64; H01M4/66; H01M4/661; H01M4/663; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
52 words
A lithium secondary cell comprising a positive electrode, a negative electrode facing said positive electrode and a nonaqueous electrolyte interposed between said positive electrode and said negative electrode, wherein a metallic compound capable of occluding or releasing lithium is used as an electrode active material, said metallic compound having an acicular microstructure.
Claim 2
Dependent Claim
52 words
A lithium secondary cell comprising a positive electrode, a negative electrode facing said positive electrode and a nonaqueous electrolyte interposed between said positive electrode and said negative electrode, wherein a metallic compound capable of occluding or releasing lithium is used as an electrode active material, said metallic compound having an acicular microstructure.
Claim 3
Dependent Claim
23 words
The lithium secondary cell according to claim 1, wherein said metallic compound capable of occluding or releasing lithium is a lithium-containing metallic compound.
Claim 4
Dependent Claim
53 words
The lithium secondary cell according to claim 1, wherein said metallic compound capable of occluding or releasing lithium is at least one member selected from the group consisting of LiMn 2 O 4 , Li x MnO 2 , LiCoO 2 , LiNiO 2 , LiFeO 2 and LiV 3 O 8 .
Claim 5
Dependent Claim
79 words
A lithium secondary cell comprising a positive electrode, a negative electrode facing said positive electrode and a nonaqueous electrolyte interposed between said positive electrode and said negative electrode, wherein a metallic compound capable of occluding or releasing lithium is used as an electrode active material, said electrode active material comprising a lithium-containing metal oxide grown into such a columnar form that the angle Θ of a conductive substrate to the normal of the surface of said substrate is 0°≦Θ<90°.
Claim 6
Dependent Claim
79 words
A lithium secondary cell comprising a positive electrode, a negative electrode facing said positive electrode and a nonaqueous electrolyte interposed between said positive electrode and said negative electrode, wherein a metallic compound capable of occluding or releasing lithium is used as an electrode active material, said electrode active material comprising a lithium-containing metal oxide grown into such a columnar form that the angle Θ of a conductive substrate to the normal of the surface of said substrate is 0°≦Θ<90°.
Claim 7
Dependent Claim
56 words
The lithium secondary cell according to claim 4 wherein said lithium-containing metal oxide is at least one member selected from the group consisting of LiMn 2 O 4 , Li x WO 3 , LiCoO 2 , LiNi 0 .4 Co 0 .6 O 2 , Li x MnO 2 and LiV 3 O 8 .
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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) | 1999-02-26 | 1999-08-28 | 2000-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-26 | 2003-08-28 | 2004-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-26 | 2007-08-28 | 2008-02-27 | $7700.00 | Window Closed / Lapsed |