JPH1154122A5 - - Google Patents
Info
- Publication number
- JPH1154122A5 JPH1154122A5 JP1997221965A JP22196597A JPH1154122A5 JP H1154122 A5 JPH1154122 A5 JP H1154122A5 JP 1997221965 A JP1997221965 A JP 1997221965A JP 22196597 A JP22196597 A JP 22196597A JP H1154122 A5 JPH1154122 A5 JP H1154122A5
- Authority
- JP
- Japan
- Prior art keywords
- lithium
- composite oxide
- weight
- cobalt
- secondary battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Description
【０００９】
【課題を解決するための手段】
本発明は、リチウム化合物を活物質とする正極を備えたリチウムイオン電池において、活物質が、リチウムコバルト複合酸化物、リチウムニッケルコバルトアルミ複合酸化物及びリチウムマンガン複合酸化物の３種混合物からなることを特徴とする。また、３種混合物中のリチウムマンガン複合酸化物の含有量を２０重量％以上、３種混合物中のリチウムニッケルコバルトアルミ複合酸化物とリチウムコバルト複合酸化物との合計含有量を４０重量％以上、７０重量％以下、３種混合物中のリチウムコバルト複合酸化物の含有量を１０重量％以上とすることを特徴とする。
[0009]
[Means for solving the problem]
The present invention provides a lithium-ion battery having a positive electrode with a lithium compound as an active material, characterized in that the active material is a ternary mixture of lithium-cobalt composite oxide, lithium-nickel-cobalt-aluminum composite oxide, and lithium-manganese composite oxide, wherein the content of the lithium-manganese composite oxide in the ternary mixture is 20% by weight or more, the total content of the lithium-nickel-cobalt-aluminum composite oxide and the lithium-cobalt composite oxide in the ternary mixture is 40% by weight or more and 70% by weight or less, and the content of the lithium-cobalt composite oxide in the ternary mixture is 10% by weight or more.
【００１０】
【発明の実施の形態】
本発明によるリチウムイオン電池では、活物質がリチウムコバルト複合酸化物、リチウムニッケルコバルトアルミ複合酸化物及びリチウムマンガン複合酸化物の３種混合物からなり、３種混合物中のリチウムマンガン複合酸化物の含有量を２０重量％以上、リチウムニッケルコバルトアルミ複合酸化物とリチウムコバルト複合酸化物との合計含有量を４０重量％以上、７０重量％以下、リチウムコバルト複合酸化物の含有量を１０重量％以上とする。このようにすることにより、リチウムコバルト複合酸化物の高容量と電子伝導性、リチウムニッケルコバルトアルミ複合酸化物の高容量、リチウムマンガン複合酸化物の低価格と導電助剤量の低減化が発現し、容量、サイクル、価格の全ての面でバランスのとれた正極を得ることができ、特にハイレート特性が向上する。安全性は低下しない。また、リチウムコバルト複合酸化物、リチウムニッケルコバルトアルミ複合酸化物混合系もしくは単独系より低コストとなる。
[0010]
[Embodiments of the Invention]
In the lithium-ion battery according to the present invention, the active material is a ternary mixture of lithium-cobalt composite oxide, lithium-nickel-cobalt-aluminum composite oxide, and lithium-manganese composite oxide, with the lithium-manganese composite oxide content being 20% by weight or more, the combined content of the lithium-nickel-cobalt-aluminum composite oxide and the lithium-cobalt composite oxide being 40% by weight or more but 70% by weight or less, and the lithium-cobalt composite oxide content being 10% by weight or more. This achieves the high capacity and electronic conductivity of the lithium-cobalt composite oxide, the high capacity of the lithium-nickel-cobalt-aluminum composite oxide, the low cost of the lithium-manganese composite oxide, and a reduced amount of conductive additive. This results in a positive electrode that is well-balanced in terms of capacity, cycle life, and cost, with particularly improved high-rate performance. Safety is not compromised. Furthermore, the cost is lower than a mixture of lithium-cobalt composite oxide and lithium-nickel-cobalt-aluminum composite oxide or a single oxide system.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9221965A JPH1154122A (en) | 1997-08-04 | 1997-08-04 | Lithium ion secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9221965A JPH1154122A (en) | 1997-08-04 | 1997-08-04 | Lithium ion secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1154122A JPH1154122A (en) | 1999-02-26 |
| JPH1154122A5 true JPH1154122A5 (en) | 2005-05-26 |
Family
ID=16774947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9221965A Withdrawn JPH1154122A (en) | 1997-08-04 | 1997-08-04 | Lithium ion secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1154122A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3869605B2 (en) * | 1999-03-01 | 2007-01-17 | 三洋電機株式会社 | Nonaqueous electrolyte secondary battery |
| US7041239B2 (en) * | 2003-04-03 | 2006-05-09 | Valence Technology, Inc. | Electrodes comprising mixed active particles |
| JP5117730B2 (en) * | 2006-03-27 | 2013-01-16 | 日立マクセルエナジー株式会社 | Non-aqueous secondary battery and method of using the same |
| JP5117729B2 (en) * | 2006-03-27 | 2013-01-16 | 日立マクセルエナジー株式会社 | Non-aqueous secondary battery and method of using the same |
| CN101188282B (en) * | 2006-03-20 | 2010-09-08 | 日立麦克赛尔株式会社 | Non-aqueous secondary battery and method of use thereof |
| JP5110556B2 (en) * | 2006-03-27 | 2012-12-26 | 日立マクセルエナジー株式会社 | Non-aqueous secondary battery and method of using the same |
-
1997
- 1997-08-04 JP JP9221965A patent/JPH1154122A/en not_active Withdrawn
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