US5478674A
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Nonaqueous electrolyte-secondary battery
Assignee: Ube Corp
•
Filing: 1994-04-28
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Granted: 1995-12-26
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Expires: 2014-04-28
Abstract
Abstract A lithium ion type nonaqueous electrolyte-secondary battery which comprises a positive electrode which comprises, as an active material, a compound oxide represented by the following chemical formula (I): LixAyMzJmOp(I) wherein A represents at least one alkali element selected from the group consisting of Na and K; M represents at least one transition element selected from the group consisting of Co, Mn and Ni; J represents an element having a glass-forming ability selected from the group consisting of B, Si, Ge, P, V, Zr, Sb and Ti; 0.8</=x</=1.3; 0</=y</=0.2; 0.8</=z</=2.0; 0.01</=m</=0.2; and 2.0</=p</=2.7; a negative electrode; and a nonaqueous electrolyte. The positive electrode-active material permits the production of nonaqueous electrolyte lithium type secondary batteries having excellent charge-discharge characteristics, discharge voltages and cycle properties.
Inventors
- 👤 Tsutomu Miyasaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:00
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/485; H01M4/62; H01M4/621; H01M4/624; H01M4/625; H01M6/00; H01M6/14; H01M6/16; H01M6/162; H01M6/164; H01M6/168
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
98 words
A lithium ion type nonaqueous electrolyte-secondary battery comprising a positive electrode which comprises, as an active material, a compound oxide represented by the following chemical formula (I): Li.sub.x A.sub.y M.sub.z J.sub.m O.sub.p (I) wherein A represents at least one alkali element selected from the group consisting of Na and K; M represents at least one transition element selected from the group consisting of Co, Mn and Ni; J represents an element selected from the group consisting of B, Si, Ge, P, V, Zr, and Sb; 0.8≦x≦1.3; 0.01≦y≦0.2; 0.8≦z≦2.0; 0.01≦m≦0.2; and 2.0≦p≦4.7; a negative electrode; and a nonaqueous electrolyte.
Claim 2
Dependent Claim
98 words
A lithium ion type nonaqueous electrolyte-secondary battery comprising a positive electrode which comprises, as an active material, a compound oxide represented by the following chemical formula (I): Li.sub.x A.sub.y M.sub.z J.sub.m O.sub.p (I) wherein A represents at least one alkali element selected from the group consisting of Na and K; M represents at least one transition element selected from the group consisting of Co, Mn and Ni; J represents an element selected from the group consisting of B, Si, Ge, P, V, Zr, and Sb; 0.8≦x≦1.3; 0.01≦y≦0.2; 0.8≦z≦2.0; 0.01≦m≦0.2; and 2.0≦p≦4.7; a negative electrode; and a nonaqueous electrolyte.
Claim 3
Dependent Claim
27 words
The nonaqueous electrolyte-secondary battery of claim 1 wherein, in the chemical formula (I), A represents Na and M represents Co; and 0.8≦x≦1.3; 0.02≦y≦0.1; 0.8≦z≦1. 0.02≦m≦0.1; and 2.0≦p≦2.7.
Claim 4
Dependent Claim
25 words
The nonaqueous electrolyte-secondary battery of claim 1 wherein, in the chemical formula (I), A represents Na; M represents Co; and J represents P or V.
Claim 5
Dependent Claim
53 words
The nonaqueous electrolyte-secondary battery of claim 1 wherein the positive electrode-active material is a compound oxide represented by the following chemical formula: Li x M z Ge m O p (wherein M represents at least one transition element selected from the group consisting of Co, Mn and Ni; 0.9≦x≦1.3; 0.8≦z≦2.0; 0.01≦m≦0.2; and 2.0≦p≦4.5).
Claim 6
Dependent Claim
23 words
The nonaqueous electrolyte-secondary battery of claim 4 wherein, in the chemical formula of the compound oxide, M represents Co; 0.9≦x≦1.3; 0.8≦z≦1.0; and 2.0≦p≦2.2.
Claim 7
Dependent Claim
25 words
The nonaqueous electrolyte-secondary battery of claim 4 wherein the compound oxide positive electrode-active material has an average particle size of not more than 2.5 μm.
Claim 8
Dependent Claim
73 words
The nonaqueous electrolyte-secondary battery of claim 1 wherein the positive electrode-active material is a compound oxide represented by the following chemical formula: Li x A y M z T m O p (wherein A represents at least one alkali element selected from the group consisting of Na and K; M represents at least one transition element selected from the group consisting of Co, Mn and Ni; 0.8≦x≦1.3; 0.01≦y≦ 0.2; 0.8≦z≦2.0; 0.01≦m≦0.2; and 2.0≦p≦4.7).
Claim 9
Dependent Claim
23 words
The nonaqueous electrolyte-secondary battery of claim 7 wherein, in the chemical formula of the compound oxide, A represents Na and M represents Co.
Claim 10
Dependent Claim
28 words
The nonaqueous electrolyte-secondary battery of claim 7 wherein, in the chemical formula of the compound oxide, A represents Na; M represents Co; 0.8≦x≦1.3; 0.02≦y≦0.1; 0.8≦z≦1.0; 0.02≦m≦0.1; and 2.0≦p≦2.7.
Claim 11
Dependent Claim
24 words
The nonaqueous electrolyte-secondary battery of claim 1 wherein the nonaqueous electrolyte comprises a propylene carbonate or ethylene carbonate-containing mixed solvent and a supporting salt.
Claim 12
Dependent Claim
21 words
The nonaqueous electrolyte-secondary battery of claim 1 wherein a carbonaceous material is used as an active material for the negative electrode.
Claim 13
Dependent Claim
39 words
The nonaqueous electrolyte-secondary battery of claim 1 wherein the nonaqueous electrolyte comprises a mixed solvent containing at least two members selected from the group consisting of propylene carbonate, ethylene carbonate, diethyl carbonate and methyl propionate and a supporting salt.
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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) | 1998-12-25 | 1999-06-26 | 1999-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-25 | 2003-06-26 | 2003-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-25 | 2007-06-26 | 2007-12-26 | $7700.00 | Window Closed / Lapsed |