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:
Oct. 02, 2012
Filed:
Jul. 09, 2010
Sung Kyun Chang, Daejeon, KR;
Hong-kyu Park, Daejeon, KR;
Hyo-shik Kil, Daejeon, KR;
Jin-hyung Lim, Daejeon, KR;
Sung kyun Chang, Daejeon, KR;
Hong-Kyu Park, Daejeon, KR;
Hyo-shik Kil, Daejeon, KR;
Jin-hyung Lim, Daejeon, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
Provided is a cathode active material which is lithium transition metal oxide having an α-NaFeOlayered crystal structure, wherein the transition metal is a blend of Ni and Mn, an average oxidation number of the transition metals except lithium is +3 or higher, and lithium transition metal oxide satisfies the Equation m(Ni)≧m(Mn) (in which m (Ni) and m (Mn) represent an molar number of manganese and nickel, respectively). The lithium transition metal oxide has a uniform and stable layered structure through control of oxidation number of transition metals to a level higher than +3, thus advantageously exerting improved overall electrochemical properties including electric capacity, in particular, superior high-rate charge/discharge characteristics.