Production method of lithium-containing composite oxide and lithium-containing composite oxide

Patent metadata

Field	Value
Publication number	US-10483536-B2
Application number	US-201514824681-A
Country	US
Kind code	B2
Filing date	Aug 12, 2015
Priority date	Aug 20, 2014
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

There is provided a production method of a lithium-containing composite oxide capable of improving performances of cycle characteristics, rate characteristics, and the like of a lithium ion secondary battery. A production method of a lithium-containing composite oxide is characterized in that when producing a lithium-containing composite oxide by mixing a transition metal hydroxide containing Ni and Mn essentially and a lithium source and heating the mixture, a transition metal hydroxide having a crystallite diameter of the (100) plane being 35 nm or less in a crystal structure model in the space group P-3m1 of an X-ray diffraction pattern is used.

First claim

What is claimed is:

1. A lithium-containing composite oxide represented by Formula 5-B,
wherein a peak intensity ratio (I 003 /I 104 ) of an integral value (I 003 ) of a diffraction peak of the (003) plane and an integral value (I 104 ) of a diffraction peak of the (104) plane in an X-ray diffraction pattern is from 1.18 to 1.35, and a crystallite size of the (110) plane in the X-ray diffraction pattern is less than 30 nm; and
wherein Formula 5-B is:
Li α2 Ni x2 Mn y2 Co z2 Me a2 O b2 . . . ,

wherein Me represents at least one type of element selected from the group consisting of Mg, Ca, Al, Ti, V, Cr, Nb, Mo, W, and Zr, and wherein α2, x2, y2, z2, a2, and b2 satisfy the relations of 1.02≤α2≤1.2, 0.3<x2≤0.6, 0.2≤y2≤0.4, 0.15≤z2≤0.35, 0≤a2≤0.1, x2+y2+z2+a2=1, and 1.9≤b2≤2.1 respectively.

2. The lithium-containing composite oxide according to claim 1 ,
wherein a specific surface area of the lithium-containing composite oxide is 0.1 to 10 m 2 /g.

3. The lithium-containing composite oxide according to claim 1 ,
wherein the peak intensity ratio (I 003 /I 104 ) is 1.20 to 1.35.

4. The lithium-containing composite oxide according to claim 1 , wherein
x2 satisfies the relation of 0.33≤x2≤0.6.

Assignees

• Sumitomo Chemical Co

Inventors

• Tamura Masahiko
• Kawasato Takeshi
• Asakura Satoshi

Classifications

• H01M2004/028

  Positive electrodes · CPC title

• C01P2006/12

  Surface area · CPC title

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M4/485 Primary

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title