POSITIVE ELECTRODE MATERIAL FOR LITHIUM SECONDARY CELL AND SECONDARY CELL USING THE SAME, AND METHOD FOR PRODUCING POSITIVE ELECTRODE MATERIAL FOR LITHIUM SECONDARY CELL

WIPO Patent Application WO/2003/083969

A1

A positive electrode material for a lithium secondary cell, characterized in that it comprises secondary particles of a lithium transition metal composite oxide containing boron and/or bismuth, and an atomic ratio of the sum of boron and bismuth to the sum of the metals except boron and bismuth in the surface portion of the secondary particles is 5 to 70 times the above atomic ratio in the whole of the secondary particles. The positive electrode material exhibits enhanced capacity and enhanced output power, and is suppressed in the reduction in output power when used with repeated charge and discharge.

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KIKUCHI KAZUHIRO (JP)
SHIMA KOJI (JP)

PCT/JP2003/003357

October 09, 2003

March 19, 2003

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MITSUBISHI CHEM CORP (JP)
KIKUCHI KAZUHIRO (JP)
SHIMA KOJI (JP)

C01G53/00; H01M4/131; H01M4/48; H01M4/485; H01M4/50; H01M4/505; H01M4/52; H01M4/525; H01M4/02; (IPC1-7): H01M4/58; C01B35/12; C01G53/00; H01M4/02

JP2001185146A	2001-07-06
JP3195175B2	2001-08-06
JPH10316431A	1998-12-02

See also references of EP 1492180A4

Oguri, Shohei (28th Floor ARK Mori Building, 12-32, Akasaka 1-chom, Minato-ku Tokyo, JP)

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