Cathode active material for lithium-ion battery, cathode for lithium-ion battery and lithium-ion battery

Patent metadata

Field	Value
Publication number	US-9911518-B2
Application number	US-201314416797-A
Country	US
Kind code	B2
Filing date	Sep 30, 2013
Priority date	Sep 28, 2012
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

A cathode active material for lithium-ion battery is provided, which provides good battery characteristics such as cycle characteristics. The cathode active material for lithium-ion battery is expressed by the composition formula: Li x Ni 1-y M y O α , wherein M is one or more selected from Ti, Cr, Mn, Fe, Co, Cu, Al, Sn, Mg and Zr; 0.9≦x≦1.2; 0<y≦0.5; and 2.0≦α≦2.2, wherein the crystallite size obtained by analyzing the XRD pattern is 870 Å or more and the unit lattice volume is 101.70 Å 3 or less.

First claim

The invention claimed is:

1. A cathode active material for lithium-ion battery expressed by the composition formula:
Li x Ni 1-y M y O α ,
wherein M is any one of (1)-(3);
(1) Co and Mn;
(2) Co, Ti and Mg;
(3) Co and Al,
wherein 0.9≦x≦1.2; 0<y≦0.5; and 2.0≦α≦2.2,
wherein the crystallite size obtained by analyzing the XRD pattern and calculated using the Williamson-Hall method is 930 Å to 1100 Å and the unit lattice volume is 101.70 Å 3 or less.

2. A cathode for lithium-ion battery comprising a cathode active material for lithium-ion battery according to claim 1 .

3. A lithium-ion battery comprising a cathode for lithium-ion battery according to claim 2 .

Assignees

• Jx Nippon Mining & Metals Corp

Inventors

• Kameyama Tatsuya
• Tamura Tomoya

Classifications

• C01P2002/60

  Compounds characterised by their crystallite size · CPC title

• H01M10/0525 Primary

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

• C01G53/42

  containing alkali metals, e.g. LiNiO2 · CPC title

• C01G53/50

  of the type (MnO2)n-, e.g. Li(NixMn1-x)O2 or Li(MyNixMn1-x-y)O2 · CPC title

• H01B1/08 Primary

  oxides · CPC title