EP0484187A2
Expired / Lapsed
EP
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Positive active material for non-aqueous electrolyte secondary battery
Assignee: Seiko Electronic Components Ltd
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Filing: 1991-11-04
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Granted: —
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Expires: 2011-11-04
Abstract
Abstract A positive active material (5) for a non-aqueous electrolyte secondary battery, the said material being composed of a layer-like structure composite oxide of the formula LixMyLz0₂, wherein M is a transition metal element and L is one or more elements selected from the group consisting of non-metal, metalloid and semi-metal elements selected from Groups IIIB, IVB and VB of the periodic table, alkaline earth metal elements and metal elements selected from Zn, Cu and Ti.
Inventors
- 👤 Kensuke Tahara
- 👤 Hideki Ishikawa
- 👤 Tsugio Sakai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 17:04
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: 16
Claim 1
Independent Claim
80 words
A positive active material for a non-aqueous electrolyte secondary battery, the said material being composed of a layer-like structure composite oxide of the formula Li x M y L z 0₂, wherein M is a transition metal element and L is one or more elements selected from the group consisting of non-metal, metalloid and semi-metal elements selected from Groups IIIB, IVB and VB of the periodic table, alkaline earth metal elements and metal elements selected from Zn, Cu and Ti.
Claim 2
Dependent Claim
31 words
A material as claimed in claim 1 characterised in that x, y and z are 0 < x < 1.15 and and 0.85 ≦ y+z ≦ 1.3 and 0 < z.
Claim 3
Dependent Claim
126 words
A non-aqueous electrolyte secondary battery comprising a negative electrode having lithium or a material capable of absorbing and releasing lithium as an active material and a lithium ion conductive non-aqueous electrolyte and a positive electrode as an active material composed of a layer-like structure composite oxide of the formula Li x M y L z 0₂, wherein M is a transition metal element and L is one or more elements selected from the group consisting of non-metal, metalloid and semi-metal elements selected from Groups IIIB, IVB and VB of the periodic table, alkaline earth metal elements and metal elements selected from Zn, Cu and Ti, and x, y and z are 0 < x ≦ 1.15 and 0.85 ≦ y+z < 1.3 and 0 < z.
Claim 4
Dependent Claim
40 words
A battery as claimed in claim 3 characterised in that the L element constituting the layer-like structure composite oxide of the said formula comprises at least one non-metal or metalloid element selected from boron B, silicon Si and phosphorus P.
Claim 5
Dependent Claim
28 words
A battery as claimed in claim 3 characterised in that the L element constituting the layer-like structure composite oxide of the said formula comprises at least magnesium Mg.
Claim 6
Dependent Claim
48 words
A battery as claimed in claim 3, characterised in that 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 in unity are used as the negative active material.
Claim 7
Dependent Claim
20 words
A battery as claimed in claim 6 characterised in that the metal which can be alloyed with lithium is aluminium.
Claim 8
Dependent Claim
135 words
A process for producing a positive active material for a non-aqueous electrolyte secondary battery, which comprises mixing lithium Li with a transition metal element M and an L element, as the simple substance or their compounds, and heating the mixture in air or in an atmosphere containing oxygen to produce a layer-like structure composite oxide of the formula Li x M y L z 0₂, wherein M is a transition metal element and L is one or more elements selected from the group consisting of non-metal, metalloid and semi-metal elements selected from Groups IIIB, IVB and VB of the periodic table, alkaline earth metal elements and metal elements selected from Zn, Cu and Ti, and x, y and z are 0 < x ≦ 1.15 and 0.85 ≦ y+z < 1.3 and 0 < z.
Claim 9
Dependent Claim
38 words
A process as claimed in claim 8 characterised in that the L element constituting the composite oxide of the said formula comprises at least one non-metal or metalloid element selected from boron B, silicon Si and phosphorus P.
Claim 10
Dependent Claim
26 words
A process as claimed in claim 8 characterised in that the L element constituting the composite oxide of the said formula comprises at least magnesium Mg.
Claim 11
Dependent Claim
21 words
A process as claimed in any of claims 8-10 characterised in that lithium hydroxide is used as the lithium Li compound.
Claim 12
Dependent Claim
18 words
A process as claimed in claim 11 characterised in that the lithium hydroxide is hydrated lithium hydroxide Li0H.H₂0.
Claim 13
Dependent Claim
28 words
A process as claimed in claims 8, 11 or 12 characterised in that the compound of the transition metal element M is a carbonate or oxide of M.
Claim 14
Dependent Claim
27 words
A process as claimed in claims 8, 11, 12 or 13 characterised in that the compound of the L element is an oxide or carbonate of L.
Claim 15
Dependent Claim
40 words
A process as claimed in any of claims 8-14 characterised in that lithium hydroxide and cobalt carbonate are mixed with an oxide of the L element, and the mixture is heated in air at a temperature of 600° to 900°C.
Claim 16
Dependent Claim
38 words
A process as claimed in claim 8 characterised in that lithium hydroxide and nickel oxide are mixed with an oxide of the L element, and the mixture is heated in air at a temperature of 600° to 900°C.
References Cited (Backward Citations)
No citation records indexed.
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