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Title:
POSITIVE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND ITS MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2003059490
Kind Code:
A
Abstract:

To provide a lithium nickel cobalt manganese composite oxide with high characteristics and useful as a positive active material for a lithium ion secondary battery, its manufacturing method, and the lithium ion secondary battery using this composite oxide.

The lithium nickel cobalt manganese composite oxide is represented by the composition formula of Li[Ni1/3Co1/3Mn1/3]O2 in which the actual atomic ratio of nickel, cobalt, and manganese is 1:1:1, has high crystalline layered structure of a rhombohedral system, and the length of a C axis belonging as a hexagonal system is 14.15 or more.


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Inventors:
ITO HIROYUKI
USUI TAKESHI
SHIMAKAWA MAMORU
Application Number:
JP2001247816A
Publication Date:
February 28, 2003
Filing Date:
August 17, 2001
Export Citation:
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Assignee:
TANAKA CHEMICAL CORP
International Classes:
H01M10/05; H01M4/505; H01M4/525; (IPC1-7): H01M4/58; H01M10/40
Domestic Patent References:
JP2003051308A2003-02-21
JP2003017052A2003-01-17
Foreign References:
WO2002086993A12002-10-31
Attorney, Agent or Firm:
Chika Takagi (2 outside)



 
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