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. 10, 2015
Filed:
Oct. 22, 2009
Sanghoon Choy, Daejeon, KR;
Yong Tae Lee, Jeonju-Si, KR;
Hong-kyu Park, Daejeon, KR;
Soo Min Park, Daejeon, KR;
Hyo-shik Kil, Daejeon, KR;
Cheol-hee Park, Daejeon, KR;
Ji Eun Lee, Seoul, KR;
Sanghoon Choy, Daejeon, KR;
Yong Tae Lee, Jeonju-Si, KR;
Hong-Kyu Park, Daejeon, KR;
Soo Min Park, Daejeon, KR;
Hyo-shik Kil, Daejeon, KR;
Cheol-Hee Park, Daejeon, KR;
Ji Eun Lee, Seoul, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
Provided is a cathode active material having a composition represented by the following Formula I: LiFe(PO) (I) wherein a molar fraction (1−x) of phosphorus (P) is in the range of 0.910 to 0.999, to allow operational efficiency of the cathode active material to be leveled to a lower operational efficiency of an anode active material and improve energy density of the cathode active material. Furthermore, a cathode active material, wherein a molar fraction (1−x) of phosphorus (P) is lower than 1, contains both Feand Fe, thus advantageously preventing structural deformation, improving ionic conductivity, exhibiting superior rate properties and inhibiting IR drop upon charge/discharge, thereby imparting high energy density to batteries.