The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 06, 2015
Filed:
Oct. 31, 2007
Seong-bae Kim, Incheon, KR;
Woo-seong Kim, Gyeonggi-do, KR;
Ji-jun Hong, Seoul, KR;
Sung-tae Koh, Chungcheongnam-do, KR;
Yoon-jeong Heo, Chungcheongnam-do, KR;
Seong-Bae Kim, Incheon, KR;
Woo-Seong Kim, Gyeonggi-do, KR;
Ji-Jun Hong, Seoul, KR;
Sung-Tae Koh, Chungcheongnam-do, KR;
Yoon-Jeong Heo, Chungcheongnam-do, KR;
Daejung Em Co., Ltd., Incheon, KR;
Kokam Co., Ltd., Siheung, KR;
Abstract
The present invention relates to a cathode active material for lithium secondary batteries with high safety, a method of preparing the same and lithium secondary batteries comprising the same. The cathode active material of the present invention comprises a lithium metal oxide secondary particle core portion formed by aggregation of lithium metal oxide primary particles; and a shell portion formed by coating the secondary particle core portion with an olivine-structured lithium iron phosphate oxide. The cathode active material of the present invention allows to manufacture lithium secondary batteries with improved safety, especially overcharge characteristics.