JP2001143708A5 - - Google Patents
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- JP2001143708A5 JP2001143708A5 JP1999327033A JP32703399A JP2001143708A5 JP 2001143708 A5 JP2001143708 A5 JP 2001143708A5 JP 1999327033 A JP1999327033 A JP 1999327033A JP 32703399 A JP32703399 A JP 32703399A JP 2001143708 A5 JP2001143708 A5 JP 2001143708A5
- Authority
- JP
- Japan
- Prior art keywords
- metal element
- trivalent metal
- cobalt
- nickel
- composite oxide
- 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.)
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- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 12
- 239000002131 composite material Substances 0.000 description 8
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 6
- 229910052803 cobalt Inorganic materials 0.000 description 6
- 239000010941 cobalt Substances 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 6
- -1 lithium nickel-cobalt Chemical compound 0.000 description 5
- 239000007774 positive electrode material Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 210000004940 Nucleus Anatomy 0.000 description 3
- 239000011255 nonaqueous electrolyte Substances 0.000 description 3
- 229910013716 LiNi Inorganic materials 0.000 description 2
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Description
【特許請求の範囲】
【請求項１】 リチウムニッケルコバルト複合酸化物（ＬｉＮｉｘＣｏ１−ｘＯ２、ｘ＞０．５）からなる核の表面に、リチウムニッケルコバルト複合酸化物のニッケルまたは／およびコバルトの一部を３価の金属元素で置換した複合酸化物からなる第二層を形成した正極活物質を用いたことを特徴とする非水電解質二次電池。
【請求項２】 リチウムニッケルコバルト複合酸化物（ＬｉＮｉｘＣｏ１−ｘＯ２、ｘ＞０．５）のニッケルまたは／およびコバルトの一部を３価の金属元素で置換した複合酸化物からなる核の表面に、リチウムニッケルコバルト複合酸化物のニッケルまたは／およびコバルトの一部を３価の金属元素で置換した複合酸化物からなる第二層を形成し、前記第二層に含まれる３価の金属元素の含有量が前記核に含まれる３価の金属元素の含有量よりも多い正極活物質を用いたことを特徴とする非水電解質二次電池。
[Claims]
1. On the surface of a nucleus composed of a lithium nickel-cobalt composite oxide (LiNi x Co 1-x O 2 , x> 0.5), a part of nickel and / or cobalt of the lithium nickel-cobalt composite oxide is applied. A non-aqueous electrolyte secondary battery characterized by using a positive electrode active material having a second layer formed of a composite oxide substituted with a trivalent metal element.
2. A composite oxide obtained by substituting a part of nickel and / or cobalt of lithium nickel-cobalt composite oxide (LiNi x Co 1-x O 2, x> 0.5) with a trivalent metal element. On the surface of the nucleus, a second layer composed of a composite oxide in which nickel and / or a part of cobalt of the lithium nickel-cobalt composite oxide is replaced with a trivalent metal element is formed, and the trivalent layer contained in the second layer is formed. A non-aqueous electrolyte secondary battery, wherein a positive electrode active material having a content of a metal element higher than that of a trivalent metal element contained in the nucleus is used.
さらに本発明は、上記非水電解質二次電池の正極活物質において、第二層におけるニッケル、コバルトおよび３価の金属元素の合計量に対する３価の金属元素の比率（原子数比）が２０％以下であることが好ましく、また、３価の金属元素がアルミニウムであることが好ましい。 Further, in the present invention, in the positive electrode active material of the non-aqueous electrolyte secondary battery, the ratio (atomic number ratio) of the trivalent metal element to the total amount of nickel, cobalt and the trivalent metal element in the second layer is 20%. The following is preferable , and the trivalent metal element is preferably aluminum.
なお、本発明の正極活物質の第二層においては、ニッケル、コバルトおよび３価の金属元素の合計量に対する３価の金属元素の比率（原子数比）を２０％以下とすることが好ましい。この比率が２０％を超えても、電池の安全性に対する効果は変わらないが、放電容量が減少するためである。 In the second layer of the positive electrode active material of the present invention, the ratio (atomic number ratio) of the trivalent metal element to the total amount of nickel, cobalt and the trivalent metal element is preferably 20% or less. Even if this ratio exceeds 20%, the effect on the safety of the battery does not change, but the discharge capacity decreases.
また、本発明の正極活物質においては、３価の金属元素としてアルミニウムを使用することが好ましい。アルミニウムは入手が容易であるうえ、リチウムニッケルコバルト複合酸化物中のニッケルまたは／およびコバルトとの置換が容易であるためである。ただし、アルミニウム以外のインジウムやイットリウム等の３価の金属元素を使用することも可能である。 Further, in the positive electrode active material of the present invention, it is preferable to use aluminum as a trivalent metal element. This is because aluminum is easily available and can be easily replaced with nickel and / or cobalt in the lithium nickel-cobalt composite oxide. However, it is also possible to use a trivalent metal element such as indium or yttrium other than aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32703399A JP2001143708A (en) | 1999-11-17 | 1999-11-17 | Non-aqueous electrolyte secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32703399A JP2001143708A (en) | 1999-11-17 | 1999-11-17 | Non-aqueous electrolyte secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001143708A JP2001143708A (en) | 2001-05-25 |
| JP2001143708A5 true JP2001143708A5 (en) | 2006-11-24 |
Family
ID=18194568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32703399A Pending JP2001143708A (en) | 1999-11-17 | 1999-11-17 | Non-aqueous electrolyte secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001143708A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6855461B2 (en) | 2001-06-15 | 2005-02-15 | Kureha Chemical Industry Co., Ltd. | Cathode material for lithium rechargeable batteries |
| US6921609B2 (en) | 2001-06-15 | 2005-07-26 | Kureha Chemical Industry Co., Ltd. | Gradient cathode material for lithium rechargeable batteries |
| JP4999292B2 (en) | 2004-07-21 | 2012-08-15 | 三洋電機株式会社 | Non-aqueous electrolyte battery |
| US10454106B2 (en) | 2004-12-31 | 2019-10-22 | Iucf-Hyu (Industry-University Cooperation Foundation Hanyang University) | Double-layer cathode active materials for lithium secondary batteries, method for preparing the active materials, and lithium secondary batteries using the active materials |
| WO2006101138A1 (en) * | 2005-03-23 | 2006-09-28 | Matsushita Electric Industrial Co., Ltd. | Lithium ion secondary battery and method for manufacturing same |
| JP5079247B2 (en) * | 2005-03-23 | 2012-11-21 | パナソニック株式会社 | Lithium ion secondary battery and manufacturing method thereof |
| US9054374B2 (en) | 2005-05-17 | 2015-06-09 | Sony Corporation | Cathode active material, method of manufacturing the same and battery |
| JP5093997B2 (en) | 2005-06-30 | 2012-12-12 | 三洋電機株式会社 | Non-aqueous electrolyte secondary battery and manufacturing method thereof |
| CN101356671B (en) | 2006-06-09 | 2010-12-15 | Agc清美化学股份有限公司 | Positive electrode active material for rechargeable battery with nonaqueous electrolyte, and method for manufacturing the same |
| JP6632233B2 (en) * | 2015-07-09 | 2020-01-22 | マクセルホールディングス株式会社 | Non-aqueous electrolyte secondary battery |
-
1999
- 1999-11-17 JP JP32703399A patent/JP2001143708A/en active Pending
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