Cathode active material, and cathode and lithium battery including the material

Patent metadata

Field	Value
Publication number	US-9246171-B2
Application number	US-201314050459-A
Country	US
Kind code	B2
Filing date	Oct 10, 2013
Priority date	Oct 11, 2012
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

A cathode active material including a lithium metal oxide represented by Formula 1:

Li[Li x Me y M′ z ]O (2+d)   Formula 1

wherein x+y+z=1, 0<x<0.33, 0<z≦0.1, and 0≦d≦0.1, Me is at least one metal selected from Mn, V, Cr, Fe, Co, Ni, Al, and B, and M′ is at least one metal selected from Sc, Y, and La.

First claim

What is claimed is:

1. A cathode active material comprising a lithium metal oxide represented by Formula 1:
Li[Li x Me y M′ z ]O (2+d)   Formula 1

wherein
x+y+z=1, 0<x<0.33, 0<z≦0.1, and 0≦d≦0.1,
Me is at least one metal selected from Mn, V, Cr, Fe, Co, Ni, Al and B, and
M′ is [at least one metal selected from] Sc[, and Y].

2. The cathode active material of claim 1 , wherein z satisfies the inequality 0.005≦z≦0.05.

3. The cathode active material of claim 1 , wherein Me comprises:
at least one metal selected from V, Cr, Fe, Co, Ni, Al, and B; and
Mn.

4. The cathode active material of claim 1 , wherein an amount of Mn is in a range of about 20 to about 80 mole percent, based on a total number of moles of [Li x Me y M′ z ] in the lithium metal oxide of Formula 1.

5. The cathode active material of claim 1 , wherein the lithium metal oxide is represented by Formula 3:
Li[Li x Ni a Co b Mn c M′ z ]O (2+d)   Formula 3

wherein x+a+b+c+z=1, 0<x<0.33, 0<z≦0.1,0<a≦0.5, 0<b≦0.5, 0.2≦c≦0.8, and 0≦d≦0.1, and
M′ is Sc [or Y].

6. The cathode active material of claim 5 , wherein z satisfies the inequality 0.005≦z≦0.05.

7. The cathode active material of claim 1 , wherein the lithium metal oxide is represented by Formula 4:
Li[Li x Ni a Co b Mn c M′ z ]O (2+d)   Formula 4

wherein x+a+b+c+z=1, 0.1<x<0.2, 0<z≦0.1,0<a≦0.3, 0<b≦0.3, 0.4≦c≦0.6, and 0≦d≦0.1, and
M′ is Sc [or Y].

8. The cathode active material of claim 7 , wherein z satisfies the condition of 0.005≦z≦0.05.

9. The cathode active material of claim 1 , wherein the lithium metal oxide is represented by Formula 5:
Li[Li x Ni a Co b Mn c Sc z ]O (2+d)   Formula 5

wherein x+a+b+c+z=1, 0.1<x<0.2, 0.005≦z≦0.1, 0<a≦0.3, 0<b≦0.3, 0.4≦c≦0.6, and 0≦d≦0.1.

10. A cathode comprising the cathode active material of claim 1 .

11. A lithium battery comprising the cathode of claim 10 .

Assignees

• Samsung Sdi Co Ltd

Inventors

• Choi Byung-Jin
• Yoon Jae-Gu
• Kim Myung-Hoon
• Park Jin-Hwan
• Keogh David
• Kaye Steven
• Tong Wei

Classifications

• Y02T10/7011

  Cross-Sectional Technologies · mapped topic

• C01P2002/52

  containing elements as dopants · CPC title

• C01G45/1235

  of the type (Mn2O4)2-, e.g. Li2Mn2O4 or Li2(MxMn2-x)O4 · CPC title

• C01G53/54

  of the type (Mn2O4)-, e.g. Li(NixMn2-x)O4 or Li(MyNixMn2-x-y)O4 · CPC title

• H01M10/0525

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