US 7,008,608 B2 · Li-Co-Mn oxide as cathode material for lithium batteries and method of synthesis of the same

Abstract

Provided is a lithium-cobalt-manganese oxide having the formula Li[CoxLi(1/3−x/3)Mn(2/3−2x/3)]O2(0.05<X<0.9) which provide a stable structure and a superior discharge capacity, and the method of synthesizing of the same. The method of synthesizing the oxides according to the present invention comprises: preparing an aqueous solution of lithium salt, cobalt salt, and manganese salt; forming a gel by burning the aqueous solution; making oxide powder by burning the gel; forming a fine oxide powder having a layered structure by the twice of treatments. The lithium-cobalt-manganese oxide synthesized according to the present invention has a stable and superior electrochemical characteristic. The oxide is synthesized by simple and low cost heat treatment process.

Claims10

Dependent claims

A method of synthesizing a lithium-cobalt-manganese oxide for secondary batteries, the method comprising:

preparing an aqueous solution of lithium salt, cobalt salt, and manganese salt;
forming a gel by heating the aqueous solution;
burning the gel to generate an oxide powder;
and
forming an oxide powder having a layered structure and a compound composition of Li[CoxLi(1/3−x/3)Mn(2/3−2x/3)]O2(0.05<X<0.9) by heat treating the oxide powder.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

10/740,885Filed 17 Dec 2003

Priority

KR 10-2003-00288677 May 2003

Published

US 2004/0228791 A118 Nov 2004

Granted

7 Mar 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification12 codes

H01M 4/505
Of manganese: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
C01G 45/1228
Manganates or manganites with trivalent manganese, tetravalent manganese or mixtures thereof: of the type -, e.g. LiMnO2 or LiO2
C01G 51/50
Containing manganese: of the type n-, e.g. LiO2 or LiO2
H01M 4/525
Of nickel, cobalt or iron: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g.…

Li-Co-Mn oxide as cathode material for lithium batteries and method of synthesis of the same

Life of this patent

Li-Co-Mn oxide as cathode material for lithium batteries and method of synthesis of the same

Life of this patent

Abstract

Claims10