continued from part 1 - Controller General of Patents, Designs, and ...

(12) PATENT APPLICATION PUBLICATION (21) Application No.6767/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :06/08/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : "MATERIAL FOR LITHIUM SECONDARY BATTERY OF HIGH PERFORMANCE"
(51) International classification :H01M 4/58 (71)Name of Applicant :
(31) Priority Document No :PCT/KR2006/001739 1)LG CHEM, LTD
(32) Priority Date :10/05/2006
Address of Applicant :20, YOIDO-DONG, YOUNGUNGPO-
(33) Name of priority country :Republic of Korea GU, SEOUL 150-721, KOREA Republic of Korea
(86) International Application No :PCT/KR2007/002267 (72)Name of Inventor :
Filing Date
:09/05/2007
1)HONG-KYU PARK
(87) International Publication No :WO 2007/129860 2)SUN SIK SHIN
(61) Patent of Addition to Application
Number
Filing Date
:NA
:NA
3)SIN YOUNG PARK
4)HO SUK SHIN
5)JENS M PAULSEN
(62) Divisional to Application Number :NA
Filing Date
:NA
(57) Abstract :
Provided is a cathode active material containing a Ni-based lithium mixed transition metal oxide. More specifically, the cathode active
material comprises the lithium mixed transition metal oxide having a composition represented by Formula I of LixMyO2 wherein M,
x and y are as defined in the specification, which is prepared by a solid-state reaction of Li2CO3 with a mixed transition metal
precursor under an oxygen- deficient atmosphere, and has a Li2CO3 content of less than 0.07% as determined by pH titration. The
cathode active material in accordance with the present invention is substantially free of water-soluble bases such as lithium carbonates
and lithium sulfates and therefore has excellent high-temperature and storage stabilities and a stable crystal structure. A secondary
battery comprising such a cathode active material exhibits a high capacity and excellent characteristics, and can be produced by an
environmentally friendly method with low production costs and high production efficiency.
No. of Pages : 57 No. of Claims : 19
The Patent Office Journal 24/10/2008 26193