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 18:38
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 .
References Cited (Backward Citations)
US4056885A
Cited
JPS5375434A
Cited
JPS6290863A
Cited
JPS63178449A
Cited
JPH02139860A
Cited
JPH02139861A
Cited
JPH02172163A
Cited
JPH02183963A
Cited
JPH03196467A
Cited
US5284721A
Cited
JPH04328244A
Cited
JPH04328245A
Cited
US5154990A
Cited
US5352548A
Cited
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 |