EP0390185A2
Expired / Lapsed
EP
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Non-aqueous electrolyte secondary cell
Assignee: Panasonic Holdings Corp
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Filing: 1990-03-30
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Granted: —
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Expires: 2010-03-30
Abstract
Abstract A non-aqueous electrolyte secondary cell comprises a negative electrode composed of at least one selected from the group consisting of lithium and lithium compounds, a non-aqueous electrolyte containing a lithium salt, and a positive electrode active material having a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein M is at least one selected from the group consisting of Co, Cr, Fe and the like, 0.85 ≦ x < 1.15, and 0.02 ≦ y ≦ 0.3. The positive electrode active material in a charged state has a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein x ≦ 0.7, owing to the extraction of lithium ions from the positive electrode active material on charging. The non-aqueous electrolyte secondary cell has an improved cycle life.
Inventors
- 👤 Yoshinori Toyoguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 09:58
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/485; H01M10/00; H01M10/05; H01M10/052; H01M4/50; H01M4/505; H01M4/58; H01M4/52; H01M4/525; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
81 words
A non-aqueous electrolyte secondary cell comprising a negative electrode composed of at least one selected from the group consisting of lithium and lithium compounds, a non-aqueous electrolyte containing a lithium salt, and a positive electrode active material having a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein M is at least one selected from the group consisting of Co, Cr, Fe and the like, 0.85 ≦ x < 1.15, and 0.02 ≦ y ≦ 0.3.
Claim 2
Dependent Claim
81 words
A non-aqueous electrolyte secondary cell comprising a negative electrode composed of at least one selected from the group consisting of lithium and lithium compounds, a non-aqueous electrolyte containing a lithium salt, and a positive electrode active material having a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein M is at least one selected from the group consisting of Co, Cr, Fe and the like, 0.85 ≦ x < 1.15, and 0.02 ≦ y ≦ 0.3.
Claim 3
Dependent Claim
53 words
The non-aqueous electrolyte secondary cell according to Claim 1, wherein said positive electrode active material in a charged state has a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein x ≦ 0.7, owing to the extraction of lithium ions from said positive electrode active material on charging.
Claim 4
Dependent Claim
21 words
The non-aqueous electrolyte secondary cell according to Claim 1 or 2, wherein said charging is performed at 4 volts or more.
Claim 5
Dependent Claim
124 words
A non-aqueous electrolyte secondary cell comprising a negative electrode composed of at least one selected from the group consisting of lithium and lithium compounds, a non-aqueous electrolyte containing a lithium salt, and a positive electrode active material having a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein M is at least one selected from the group consisting of Co, Cr, Fe and the like, 0.85 ≦ x < 1.15, and 0.02 ≦ y ≦ 0.3, said positive electrode active material in a charged state having the composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein x ≦ 0.7, owing to the extraction of lithium ions from said positive electrode active material on charging.
Claim 6
Dependent Claim
124 words
A non-aqueous electrolyte secondary cell comprising a negative electrode composed of at least one selected from the group consisting of lithium and lithium compounds, a non-aqueous electrolyte containing a lithium salt, and a positive electrode active material having a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein M is at least one selected from the group consisting of Co, Cr, Fe and the like, 0.85 ≦ x < 1.15, and 0.02 ≦ y ≦ 0.3, said positive electrode active material in a charged state having the composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein x ≦ 0.7, owing to the extraction of lithium ions from said positive electrode active material on charging.
Claim 7
Dependent Claim
67 words
A non-aqueous electrolyte secondary cell comprising a negative electrode composed of at least one selected from the group consisting of lithium and lithium compounds, a non-aqueous electrolyte containing a lithium salt, and a positive electrode active material having a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein M is Co, 0.85 ≦ x < 1.15, and 0.02 ≦ y ≦ 0.3.
Claim 8
Dependent Claim
67 words
A non-aqueous electrolyte secondary cell comprising a negative electrode composed of at least one selected from the group consisting of lithium and lithium compounds, a non-aqueous electrolyte containing a lithium salt, and a positive electrode active material having a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein M is Co, 0.85 ≦ x < 1.15, and 0.02 ≦ y ≦ 0.3.
Claim 9
Dependent Claim
53 words
The non-aqueous electrolyte secondary cell according to Claim 5, wherein said positive electrode active material in a charged state has a composition represented by the general formula, Li x M y Mn (2-y )O₄, wherein x ≦ 0.7, owing to the extraction of lithium ions from said positive electrode active material on charging.
Claim 10
Dependent Claim
21 words
The non-aqueous electrolyte secondary cell according to Claim 5 or 6, wherein said charging is performed at 4 volts or more.
Claim 11
Dependent Claim
110 words
A non-aqueous electrolyte secondary cell comprising a negative electrode composed of at least one selected from the group consisting of lithium and lithium compounds, a non-aqueous electrolyte containing a lithium salt, and a positive electrode active material having a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein M is Co, 0.85 ≦ x < 1.15, and 0.02 ≦ y < 0.3, said positive electrode active material in a charged state having the composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein x ≦ 0.7, owing to the extraction of lithium ions from said positive electrode active material on charging.
Claim 12
Dependent Claim
110 words
A non-aqueous electrolyte secondary cell comprising a negative electrode composed of at least one selected from the group consisting of lithium and lithium compounds, a non-aqueous electrolyte containing a lithium salt, and a positive electrode active material having a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein M is Co, 0.85 ≦ x < 1.15, and 0.02 ≦ y < 0.3, said positive electrode active material in a charged state having the composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein x ≦ 0.7, owing to the extraction of lithium ions from said positive electrode active material on charging.
Claim 13
Dependent Claim
80 words
A non-aqueous electrolyte secondary cell comprising a negative electrode composed of at least one selected from the group consisting of lithium and lithium compounds, a non-aqueous electrolyte containing a lithium salt, and a positive electrode active material having a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein M is at least one selected from the group consisting of Cr, Fe and the like, 0.85 ≦ x < 1.15, and 0.02 ≦ y ≦ 0.3.
Claim 14
Dependent Claim
80 words
A non-aqueous electrolyte secondary cell comprising a negative electrode composed of at least one selected from the group consisting of lithium and lithium compounds, a non-aqueous electrolyte containing a lithium salt, and a positive electrode active material having a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein M is at least one selected from the group consisting of Cr, Fe and the like, 0.85 ≦ x < 1.15, and 0.02 ≦ y ≦ 0.3.
Claim 15
Dependent Claim
53 words
The non-aqueous electrolyte secondary cell according to Claim 9, wherein said positive electrode active material in a charged state has a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein x ≦ 0.7, owing to the extraction of lithium ions from said positive electrode active material on charging.
Claim 16
Dependent Claim
21 words
The non-aqueous electrolyte secondary cell according to Claim 9 or 10, wherein said charging is performed at 4 volts or more.
Claim 17
Dependent Claim
123 words
A non-aqueous electrolyte secondary cell comprising a negative electrode composed of at least one selected from the group consisting of lithium and lithium compounds, a non-aqueous electrolyte containing a lithium salt, and a positive electrode active material having a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein M is at least one selected from the group consisting of Cr, Fe and the like, 0.85 ≦ x < 1.15, and 0.02 ≦ y ≦ 0.3, said positive electrode active material in a charged state having a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein x ≦ 0.7, owing to the extraction of lithium ions from said positive electrode active material on charging.
Claim 18
Dependent Claim
123 words
A non-aqueous electrolyte secondary cell comprising a negative electrode composed of at least one selected from the group consisting of lithium and lithium compounds, a non-aqueous electrolyte containing a lithium salt, and a positive electrode active material having a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein M is at least one selected from the group consisting of Cr, Fe and the like, 0.85 ≦ x < 1.15, and 0.02 ≦ y ≦ 0.3, said positive electrode active material in a charged state having a composition represented by the general formula, Li x M y Mn (2-y) O₄, wherein x ≦ 0.7, owing to the extraction of lithium ions from said positive electrode active material on charging.
References Cited (Backward Citations)
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