METHOD FOR PREPARING CATHODE ACTIVE MATERIAL PRECURSOR FOR LITHIUM SECONDARY BATTERY, CATHODE ACTIVE MATERIAL PRECURSOR FOR LITHIUM SECONDARY BATTERY PREPARED THEREBY, AND CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY CONTAINING SAME

Title:

Document Type and Number:

WIPO Patent Application WO/2013/147537

Kind Code:

A1

Abstract:

The present invention relates to a method for preparing a cathode active material precursor for a lithium secondary battery, a cathode active material precursor for a lithium secondary battery prepared thereby, and a cathode active material for a lithium secondary battery containing the same. According to the present invention, the method for preparing a cathode active material precursor for a lithium secondary battery, which has excellent thermal stability due to a metal composition having a continuous concentration gradient from the interface at which a core and an outer shell make contact to an active material surface, controls the concentration of a concentration gradient portion and a shell portion in a precursor, thereby obtaining a desired concentration of a transition metal in a shell.

Inventors:

SUN YANG-KOOK (KR)

Application Number:

PCT/KR2013/002616

Publication Date:

October 03, 2013

Filing Date:

March 29, 2013

Export Citation:

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Assignee:

IUCF HYU (KR)

International Classes:

H01M4/525; H01M4/139

Foreign References:

KR20070097923A	2007-10-05
KR100815583B1	2008-03-20
KR20110083383A	2011-07-20
US20100209779A1	2010-08-19
US20110159365A1	2011-06-30
JPH09237631A	1997-09-09
JPH08171910A	1996-07-02
JP2000227858A	2000-08-15
EP0918041A1	1999-05-26
US6040090A	2000-03-21
EP0872450A1	1998-10-21
KR20060035547A	2006-04-26
KR100744759B1	2007-08-01

Other References:

J. R. DAHN ET AL., SOLID STATE IONICS, vol. 69, 1994, pages 265
T. OHZUKU ET AL., J. ELECTROCHEM. SOC., vol. 142, 1995, pages 4033