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:
Mar. 07, 2017
Filed:
Jun. 18, 2014
Lg Chem, Ltd., Seoul, KR;
Hong-Kyu Park, Daejeon, KR;
Sun sik Shin, Daejeon, KR;
Sin young Park, Daejeon, KR;
Ho suk Shin, Daejeon, KR;
Jens M. Paulsen, Chungcheongnam-do, KR;
LG Chem, Ltd., , KR;
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 LiMOwherein M, x and y are as defined in the specification, which is prepared by a solid-state reaction of LiCOwith a mixed transition metal precursor under an oxygen-deficient atmosphere, and has a LiCOcontent of less than 0.07% by weight of the cathode active material as determined by pH titration. The cathode active material in accordance with the present invention and 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.