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US5286582A
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Monaqueous electrolyte secondary battery and process for producing positive active materials
Assignee: Seiko Electronic Components Ltd
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Filing: 1991-11-01
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Granted: 1994-02-15
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Expires: 2011-11-01
Abstract
Abstract A nonaqueous electrolyte secondary battery uses lithium or a substance capable of absorbing and releasing lithium as a negative active material of a negative electrode, and uses a layer-like composite oxide of the formula Li x M y L z O 2 , where M is one or more transistion metal elements selected from Groups IIIB, IVB, VB, VIB, VIIB and VIII of the periodic table, L is one or more elements selected from nonmetal, metalloid and semimetal elements selected from Groups IIIA, IVA and VA of the periodic table, alkaline earth metal elements and metal elements of Zn and Cu as a positive active material constituting a positive electrode. The polarization (internal resistance) at the time of charging and discharging is reduced and an effective charging-discharging capacity is enhanced. Charging and discharging at a large current become easy, and a cycle deterioration is improved.
Inventors
- 👤 Kensuke Tahara
- 👤 Hideki Ishikawa
- 👤 Tsugio Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:54
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/485; C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/45; C01B33/00; C01B33/20; C01B35/00; C01B35/08; C01B35/10; C01B35/12; C01B35/128; C01G; C01G51/00; C01G51/40; C01G51/42; C01G53/00; C01G53/40; C01G53/42; H01M10/00; H01M10/05; H01M10/052; H01M4/52; H01M4/525; H01M4/58; C01P; C01P2002/00; C01P2002/20; C01P2002/50; C01P2002/52; C01P2002/54; C01P2002/70; C01P2002/72; C01P2002/74; C01P2004/00; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/40; H01M4/13; H01M4/131; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
126 words
A nonaqueous electrolyte secondary battery comprising: a negative electrode having lithium or a material capable of absorbing and releasing lithium as an active material; a lithium ion conductive nonaqueous electrolyte; and a positive electrode having an active material composed of a layer-like structure composite oxide Li.sub.x M.sub.y L.sub.z O.sub.2 ( 1) wherein M is one or more transition metal elements selected from Groups IIIB, IVB, VB, VIB, VIIB and VIII of the periodic table and L is one or more elements selected from the group consisting of nonmetal, metalloid and semimetal elements selected from Groups IIIA, IVB and VA of the periodic table, alkaline earth metal elements and metal elements selected from Zn and Cu, and x, y and z are 0<x≦1.15 and 0.85≦y+z≦1.3 and 0<z.
Claim 2
Dependent Claim
126 words
A nonaqueous electrolyte secondary battery comprising: a negative electrode having lithium or a material capable of absorbing and releasing lithium as an active material; a lithium ion conductive nonaqueous electrolyte; and a positive electrode having an active material composed of a layer-like structure composite oxide Li.sub.x M.sub.y L.sub.z O.sub.2 ( 1) wherein M is one or more transition metal elements selected from Groups IIIB, IVB, VB, VIB, VIIB and VIII of the periodic table and L is one or more elements selected from the group consisting of nonmetal, metalloid and semimetal elements selected from Groups IIIA, IVB and VA of the periodic table, alkaline earth metal elements and metal elements selected from Zn and Cu, and x, y and z are 0<x≦1.15 and 0.85≦y+z≦1.3 and 0<z.
Claim 3
Dependent Claim
38 words
A nonaqueous electrolyte secondary battery of claim 1; wherein the L element constituting the layer-like structure composite oxide of formula (1) comprises at least one nonmetal or metalloid element selected from boron B, silicon Si and phosphorus P.
Claim 4
Dependent Claim
26 words
A nonaqueous electrolyte secondary battery of claim 1; wherein the L element constituting the layer-like structure composite oxide of formula (1) comprises at least magnesium Mg.
Claim 5
Dependent Claim
47 words
A nonaqueous electrolyte secondary battery of claim 1; wherein the active material of the negative electrode comprises a metal which can be alloyed with lithium, an alloy of lithium and a metal or a metal which can be alloyed with lithium and lithium which are laminated together.
Claim 6
Dependent Claim
19 words
A nonaqueous electrolyte secondary battery of claim 4; wherein the metal which can be alloyed with lithium is aluminum.
Claim 7
Dependent Claim
125 words
A positive active material for use in a secondary cell having a negative active material composed of lithium or a material capable of absorbing and releasing lithium and a nonaqueous electrolyte capable of conducting lithium ions, the positive active material comprising: a composite oxide Li.sub.x M.sub.y L.sub.z O.sub.2 ( 1) wherein M is one or more transition metal elements selected from Groups IIIB, IVB, VB, VIB, VIIB and VIII of the periodic table and L is one or more elements selected from the group consisting of nonmetal, metalloid and semimetal elements selected from Groups IIIA, IVA and VA of the periodic table, alkaline earth metal elements and metal elements selected from Zn and Cu, and x, y and z are 0<x≦1.15 and 0.85≦y+z≦1.3 and 0<z.
Claim 8
Dependent Claim
125 words
A positive active material for use in a secondary cell having a negative active material composed of lithium or a material capable of absorbing and releasing lithium and a nonaqueous electrolyte capable of conducting lithium ions, the positive active material comprising: a composite oxide Li.sub.x M.sub.y L.sub.z O.sub.2 ( 1) wherein M is one or more transition metal elements selected from Groups IIIB, IVB, VB, VIB, VIIB and VIII of the periodic table and L is one or more elements selected from the group consisting of nonmetal, metalloid and semimetal elements selected from Groups IIIA, IVA and VA of the periodic table, alkaline earth metal elements and metal elements selected from Zn and Cu, and x, y and z are 0<x≦1.15 and 0.85≦y+z≦1.3 and 0<z.
Claim 9
Dependent Claim
36 words
A positive active material according to claim 6; wherein the L element constituting the composite oxide of formula (1) comprises at least one nonmetal or metalloid element selected from boron B, silicon Si and phosphorus P.
Claim 10
Dependent Claim
24 words
A positive active material according to claim 6; wherein the L element constituting the composite oxide of formula (1) comprises at least magnesium Mg.
Claim 11
Dependent Claim
53 words
A secondary cell which includes the positive active material according to claim 6; wherein the secondary cell has a negative active material comprising a metal which can be alloyed with lithium, an alloy of lithium and a metal or a metal which can be alloyed with lithium and lithium which are laminated together.
Claim 12
Dependent Claim
18 words
A secondary cell according to claim 9; wherein the metal which can be alloyed with lithium is aluminum.
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) | 1997-02-14 | 1997-08-16 | 1998-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-14 | 2001-08-16 | 2002-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-14 | 2005-08-16 | 2006-02-15 | $7700.00 | Window Closed / Lapsed |