Lithium complex oxide

Patent metadata

Field	Value
Publication number	US-10153487-B2
Application number	US-201515111021-A
Country	US
Kind code	B2
Filing date	Feb 25, 2015
Priority date	Mar 3, 2014
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

Provided is a novel lithium complex oxide containing molybdenum. A complex oxide represented by the following compositional formula: LixMyMozO wherein M is one or two or more selected from the group consisting of Mn, Ru, Sn, Mg, Al, Ti, V, Cr, Fe, Co, Ni, Cu, and Zn; x is in the range of 0.60 to 0.75; y is in the range of 0.15 to 0.25; and z is in the range of 0.075 to 0.20.

First claim

The invention claimed is:

1. A complex oxide represented by the following compositional formula:
Li x M y Mo z O
wherein M is one or two or more selected from the group consisting of Mn, Ru, Sn, Mg, Al, Ti, V, Cr, Fe, Co, Ni, Cu, and Zn, and x is in the range of 0.60 to 0.75, y is in the range of 0.15 to 0.25, z is in the range of 0.075 to 0.20, and an average valence of Mo is 5.7 to 6.0, wherein the complex oxide has a Li 5 ReO 6 -type crystal structure with Re sites substituted with Mo or M, and with a part of Li sites substituted with M.

2. The complex oxide according to claim 1 , satisfying: x+y+z=0.95 to 1.05.

3. The complex oxide according to claim 1 , wherein M is one or two or more selected from the group consisting of Ni, Mn, Fe, and Co.

4. A positive electrode for a nonaqueous electrolyte secondary battery, comprising the complex oxide according to claim 1 as a positive electrode active material.

5. A non-aqueous electrolyte secondary battery comprising the positive electrode according to claim 4 .

6. A complex oxide represented by the following compositional formula:
Li x M y Mo z O
wherein M is one or two or more selected from the group consisting of Mn, Ru, Sn, Mg, Al, Ti, V, Cr, Fe, Co, Ni, Cu, and Zn, and x is in the range of 0.60 to 0.75, y is in the range of 0.15 to 0.25, z is in the range of 0.075 to 0.20, and an average valence of Mo is 5.7 to 6.0, wherein the complex oxide has a Li 4 MoO 5 -type crystal structure with a part of Mo sites substituted with M, and with a part of Li sites substituted with M.

7. The complex oxide according to claim 6 , satisfying: x+y+z=0.95 to 1.05.

8. The complex oxide according to claim 6 , wherein M is one or two or more selected from the group consisting of Ni, Mn, Fe, and Co.

9. A positive electrode for a nonaqueous electrolyte secondary battery, comprising the complex oxide according to claim 6 as a positive electrode active material.

10. A non-aqueous electrolyte secondary battery comprising the positive electrode according to claim 9 .

11. A complex oxide represented by the following compositional formula:
Li x M y Mo z O
wherein M is one or two or more selected from the group consisting of Mn, Ru, Sn, Mg, Al, Ti, V, Cr, Fe, Co, Ni, Cu, and Zn, and x is in the range of 0.60 to 0.75, y is in the range of 0.15 to 0.25, z is in the range of 0.075 to 0.20, and an average valence of Mo is 5.7 to 6.0, wherein the complex oxide has a Li 2 MnO 3 -type crystal structure with Mn sites substituted with Mo or M, and with a part of Li sites substituted with M.

12. The complex oxide according to claim 11 , satisfying: x+y+z=0.95 to 1.05.

13. The complex oxide according to claim 11 , wherein M is one or two or more selected from the group consisting of Ni, Mn, Fe, and Co.

14. A positive electrode for a nonaqueous electrolyte secondary battery, comprising the complex oxide according to claim 11 as a positive electrode active material.

15. A non-aqueous electrolyte secondary battery comprising the positive electrode according to claim 14 .

Assignees

• Jx Nippon Mining & Metals Corp
• Univ Tokyo Science Found

Inventors

• Yabuuchi Naoaki
• Komaba Shinichi
• Kajiya Yoshio

Classifications

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/625

  Carbon or graphite · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• C01P2002/76

  by a space-group or by other symmetry indications · CPC title

• C01G45/1221

  Manganates or manganites with trivalent manganese, tetravalent manganese or mixtures thereof · CPC title